2020-03-16 release

2020-09-06 19:02:03 +02:00 · 2020-09-06 19:02:03 +02:00 · 383e2b06c8
commit 383e2b06c8
parent 0e8fffd4de
26 changed files with 2352 additions and 2020 deletions
--- a/11
+++ b/11
@ -1,3 +1,14 @@
+2020-03-16:
+
+- reworked error handling in std and os libraries: suppressed I/O
+  exceptions in std FILE functions and return a positive errno value
+  when it is explicit
+- output exception messages to stderr
+- added std.loadFile(), std.strerror(), std.FILE.prototype.tello()
+- added JS_GetRuntimeOpaque(), JS_SetRuntimeOpaque(), JS_NewUint32()
+- updated to Unicode 13.0.0
+- misc bug fixes
+
 2020-01-19:

 - keep CONFIG_BIGNUM in the makefile
--- a/5
+++ b/5
@ -73,5 +73,6 @@ REPL:
 Test262o:   0/11262 errors, 463 excluded
 Test262o commit: 7da91bceb9ce7613f87db47ddd1292a2dda58b42 (es5-tests branch)

-Test262:   17/69942 errors, 855 excluded, 581 skipped
-test262 commit: 28b4fcca4b1b1d278dfe0cc0e69c7d9d59b31aab
+Test262:   22/70040 errors, 860 excluded, 581 skipped
+test262 commit: 25c9e334d301944537215caba1d7f44319f3e0da
+
--- a/2
+++ b/2
@ -1 +1 @@
-2020-01-19
+2020-03-16
--- a/doc/jsbignum.html
+++ b/doc/jsbignum.html
@ -1,8 +1,7 @@
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
-<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.1, http://www.gnu.org/software/texinfo/ -->
 <head>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>Javascript Bignum Extensions</title>

 <meta name="description" content="Javascript Bignum Extensions">
@ -10,6 +9,7 @@
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="#SEC_Contents" rel="contents" title="Table of Contents">
 <style type="text/css">
 <!--
@ -121,7 +121,7 @@ changes were done in order to simplify the implementation.
 <ul>
 <li> <code>with operators from</code> is not supported. Operator overloading is always enabled.

-</li><li> The dispatch is not based on a static <code>[[OperatorSet]]</code> field in all instances. Instead, a dynamic lookup the of the <code>Symbol.operatorSet</code> property is done. This property is typically added in the prototype of each object.
+</li><li> The dispatch is not based on a static <code>[[OperatorSet]]</code> field in all instances. Instead, a dynamic lookup of the <code>Symbol.operatorSet</code> property is done. This property is typically added in the prototype of each object.

 </li><li> <code>Operators.create(...dictionaries)</code> is used to create a new OperatorSet object. The <code>Operators</code> function is supported as an helper to be closer to the TC39 proposal.

@ -194,7 +194,7 @@ raised if <em>a &lt; 0</em>.
 <h3 class="section">4.1 Introduction</h3>

 <p>This extension adds the <code>BigFloat</code> primitive type. The
-<code>BigFloat</code> type represents floating point numbers are in base 2
+<code>BigFloat</code> type represents floating point numbers in base 2
 with the IEEE 754 semantics. A floating
 point number is represented as a sign, mantissa and exponent. The
 special values <code>NaN</code>, <code>+/-Infinity</code>, <code>+0</code> and <code>-0</code>
@ -216,15 +216,13 @@ point environment is used.
 <code>RNDN</code> (&ldquo;round to nearest with ties to even&rdquo;)<a name="DOCF1" href="#FOOT1"><sup>1</sup></a>. The status flags of the global environment cannot be
 read<a name="DOCF2" href="#FOOT2"><sup>2</sup></a>. The precision of the global environment is
 <code>BigFloatEnv.prec</code>. The number of exponent bits of the global
-environment is <code>BigFloatEnv.expBits</code>.  If <code>BigFloatEnv.expBits</code> is
-strictly smaller than the maximum allowed number of exponent bits
-(<code>BigFloatEnv.expBitsMax</code>), then the global environment subnormal
-flag is set to <code>true</code>. Otherwise it is set to <code>false</code>;
+environment is <code>BigFloatEnv.expBits</code>. The global environment
+subnormal flag is set to <code>true</code>.
 </p>
-<p>For example, <code>prec = 53</code> and <code> expBits = 11</code> give exactly
-the same precision as the IEEE 754 64 bit floating point. The
+<p>For example, <code>prec = 53</code> and <code> expBits = 11</code> exactly give
+the same precision as the IEEE 754 64 bit floating point format. The
 default precision is <code>prec = 113</code> and <code> expBits = 15</code> (IEEE
-754 128 bit floating point).
+754 128 bit floating point format).
 </p>
 <p>The global floating point environment can only be modified temporarily
 when calling a function (see <code>BigFloatEnv.setPrec</code>). Hence a
@ -433,9 +431,8 @@ environment. The initial value is <code>113</code>.
 </dd>
 <dt><code>expBits</code></dt>
 <dd><p>Getter. Return the exponent size in bits of the global floating point
-environment assuming an IEEE 754 representation. If <code>expBits &lt;
-expBitsMax</code>, then subnormal numbers are supported. The initial value
-is <code>15</code>.
+environment assuming an IEEE 754 representation. The initial value is
+<code>15</code>.
 </p>
 </dd>
 <dt><code>setPrec(f, p[, e])</code></dt>
@ -608,7 +605,7 @@ Number value.

 <p>It returns <code>0m</code> if no parameter is provided. Otherwise the first
 parameter is converted to a bigdecimal by using ToString(). Hence
-Number value are not converted to their exact numerical value as
+Number values are not converted to their exact numerical value as
 BigDecimal.
 </p>
 <a name="Properties-of-the-BigDecimal-object"></a>
@ -702,12 +699,12 @@ always represented as BigFloat.

 </li><li> The logical xor operator is still available with the <code>^^</code> operator.

-</li><li> The integer division operator can be overloaded by modifying the corresponding operator in <code>BigInt.prototype.[[OperatorSet]]</code>.
-
-</li><li> The integer power operator with a non zero negative exponent can be overloaded by modifying the corresponding operator in <code>BigInt.prototype.[[OperatorSet]]</code>.
-
 </li><li> The modulo operator (<code>%</code>) returns the Euclidian remainder (always positive) instead of the truncated remainder.

+</li><li> The integer division operator can be overloaded with <code>Operators.updateBigIntOperators(dictionary)</code>.
+
+</li><li> The integer power operator with a non zero negative exponent can be overloaded with <code>Operators.updateBigIntOperators(dictionary)</code>.
+
 </li></ul>

 <div class="footnote">
--- a/doc/jsbignum.pdf
+++ b/doc/jsbignum.pdf
--- a/doc/jsbignum.texi
+++ b/doc/jsbignum.texi
@ -57,7 +57,7 @@ More precisely, the following modifications were made:

@item @code{with operators from} is not supported. Operator overloading is always enabled.

-@item The dispatch is not based on a static @code{[[OperatorSet]]} field in all instances. Instead, a dynamic lookup the of the @code{Symbol.operatorSet} property is done. This property is typically added in the prototype of each object.
+@item The dispatch is not based on a static @code{[[OperatorSet]]} field in all instances. Instead, a dynamic lookup of the @code{Symbol.operatorSet} property is done. This property is typically added in the prototype of each object.

@item @code{Operators.create(...dictionaries)} is used to create a new OperatorSet object. The @code{Operators} function is supported as an helper to be closer to the TC39 proposal.

@ -119,7 +119,7 @@ Return the number of trailing zeros in the two's complement binary representatio
@section Introduction

 This extension adds the @code{BigFloat} primitive type. The
-@code{BigFloat} type represents floating point numbers are in base 2
+@code{BigFloat} type represents floating point numbers in base 2
 with the IEEE 754 semantics. A floating
 point number is represented as a sign, mantissa and exponent. The
 special values @code{NaN}, @code{+/-Infinity}, @code{+0} and @code{-0}
@ -143,15 +143,13 @@ explicit.}. The status flags of the global environment cannot be
 read@footnote{The rationale is to avoid side effects for the built-in
 operators.}. The precision of the global environment is
@code{BigFloatEnv.prec}. The number of exponent bits of the global
-environment is @code{BigFloatEnv.expBits}.  If @code{BigFloatEnv.expBits} is
-strictly smaller than the maximum allowed number of exponent bits
-(@code{BigFloatEnv.expBitsMax}), then the global environment subnormal
-flag is set to @code{true}. Otherwise it is set to @code{false};
+environment is @code{BigFloatEnv.expBits}. The global environment
+subnormal flag is set to @code{true}.

-For example, @code{prec = 53} and @code{ expBits = 11} give exactly
-the same precision as the IEEE 754 64 bit floating point. The
+For example, @code{prec = 53} and @code{ expBits = 11} exactly give
+the same precision as the IEEE 754 64 bit floating point format. The
 default precision is @code{prec = 113} and @code{ expBits = 15} (IEEE
-754 128 bit floating point).
+754 128 bit floating point format).

 The global floating point environment can only be modified temporarily
 when calling a function (see @code{BigFloatEnv.setPrec}). Hence a
@ -345,9 +343,8 @@ environment. The initial value is @code{113}.

@item expBits
 Getter. Return the exponent size in bits of the global floating point
-environment assuming an IEEE 754 representation. If @code{expBits <
-expBitsMax}, then subnormal numbers are supported. The initial value
-is @code{15}.
+environment assuming an IEEE 754 representation. The initial value is
+@code{15}.

@item setPrec(f, p[, e])
 Set the precision of the global floating point environment to @code{p}
@ -492,7 +489,7 @@ BigDecimal literals are decimal floating point numbers with a trailing

 It returns @code{0m} if no parameter is provided. Otherwise the first
 parameter is converted to a bigdecimal by using ToString(). Hence
-Number value are not converted to their exact numerical value as
+Number values are not converted to their exact numerical value as
 BigDecimal.

@subsection Properties of the @code{BigDecimal} object
@ -581,12 +578,12 @@ The following changes are made to the Javascript semantics:

@item The logical xor operator is still available with the @code{^^} operator.

-@item The integer division operator can be overloaded by modifying the corresponding operator in @code{BigInt.prototype.[[OperatorSet]]}.
-
-@item The integer power operator with a non zero negative exponent can be overloaded by modifying the corresponding operator in @code{BigInt.prototype.[[OperatorSet]]}.
-
@item The modulo operator (@code{%}) returns the Euclidian remainder (always positive) instead of the truncated remainder.

+@item The integer division operator can be overloaded with @code{Operators.updateBigIntOperators(dictionary)}.
+
+@item The integer power operator with a non zero negative exponent can be overloaded with @code{Operators.updateBigIntOperators(dictionary)}.
+
@end itemize

@bye
--- a/doc/quickjs.html
+++ b/doc/quickjs.html
@ -1,8 +1,7 @@
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
-<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.1, http://www.gnu.org/software/texinfo/ -->
 <head>
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <title>QuickJS Javascript Engine</title>

 <meta name="description" content="QuickJS Javascript Engine">
@ -10,6 +9,7 @@
 <meta name="resource-type" content="document">
 <meta name="distribution" content="global">
 <meta name="Generator" content="makeinfo">
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 <link href="#SEC_Contents" rel="contents" title="Table of Contents">
 <style type="text/css">
 <!--
@ -519,50 +519,39 @@ optional properties:
 <dd><p>Evaluate the file <code>filename</code> as a script (global eval).
 </p>
 </dd>
-<dt><code>Error(errno)</code></dt>
-<dd>
-<p><code>std.Error</code> constructor. Error instances contain the field
-<code>errno</code> (error code) and <code>message</code> (result of
-<code>std.Error.strerror(errno)</code>).
-</p>
-<p>The constructor contains the following fields:
-</p>
-<dl compact="compact">
-<dt><code>EINVAL</code></dt>
-<dt><code>EIO</code></dt>
-<dt><code>EACCES</code></dt>
-<dt><code>EEXIST</code></dt>
-<dt><code>ENOSPC</code></dt>
-<dt><code>ENOSYS</code></dt>
-<dt><code>EBUSY</code></dt>
-<dt><code>ENOENT</code></dt>
-<dt><code>EPERM</code></dt>
-<dt><code>EPIPE</code></dt>
-<dd><p>Integer value of common errors (additional error codes may be defined).
-  </p></dd>
-<dt><code>strerror(errno)</code></dt>
-<dd><p>Return a string that describes the error <code>errno</code>.
-  </p></dd>
-</dl>
-
-</dd>
-<dt><code>open(filename, flags)</code></dt>
-<dd><p>Open a file (wrapper to the libc <code>fopen()</code>). Throws 
-<code>std.Error</code> in case of I/O error.
+<dt><code>loadFile(filename)</code></dt>
+<dd><p>Load the file <code>filename</code> and return it as a string assuming UTF-8
+encoding. Return <code>null</code> in case of I/O error.
 </p>
 </dd>
-<dt><code>popen(command, flags)</code></dt>
-<dd><p>Open a process by creating a pipe (wrapper to the libc <code>popen()</code>). Throws 
-<code>std.Error</code> in case of I/O error.
+<dt><code>open(filename, flags, errorObj = undefined)</code></dt>
+<dd><p>Open a file (wrapper to the libc <code>fopen()</code>). Return the FILE
+object or <code>null</code> in case of I/O error. If <code>errorObj</code> is not
+undefined, set its <code>errno</code> property to the error code or to 0 if
+no error occured.
 </p>
 </dd>
-<dt><code>fdopen(fd, flags)</code></dt>
+<dt><code>popen(command, flags, errorObj = undefined)</code></dt>
+<dd><p>Open a process by creating a pipe (wrapper to the libc
+<code>popen()</code>). Return the FILE
+object or <code>null</code> in case of I/O error. If <code>errorObj</code> is not
+undefined, set its <code>errno</code> property to the error code or to 0 if
+no error occured.
+</p>
+</dd>
+<dt><code>fdopen(fd, flags, errorObj = undefined)</code></dt>
 <dd><p>Open a file from a file handle (wrapper to the libc
-<code>fdopen()</code>). Throws <code>std.Error</code> in case of I/O error.
+<code>fdopen()</code>). Return the FILE
+object or <code>null</code> in case of I/O error. If <code>errorObj</code> is not
+undefined, set its <code>errno</code> property to the error code or to 0 if
+no error occured.
 </p>
 </dd>
-<dt><code>tmpfile()</code></dt>
-<dd><p>Open a temporary file. Throws <code>std.Error</code> in case of I/O error.
+<dt><code>tmpfile(errorObj = undefined)</code></dt>
+<dd><p>Open a temporary file. Return the FILE
+object or <code>null</code> in case of I/O error. If <code>errorObj</code> is not
+undefined, set its <code>errno</code> property to the error code or to 0 if
+no error occured.
 </p>
 </dd>
 <dt><code>puts(str)</code></dt>
@ -589,6 +578,29 @@ optional properties:
 <dd><p>Constants for seek().
 </p>
 </dd>
+<dt><code>Error</code></dt>
+<dd>
+<p>Enumeration object containing the integer value of common errors
+(additional error codes may be defined):
+</p>
+<dl compact="compact">
+<dt><code>EINVAL</code></dt>
+<dt><code>EIO</code></dt>
+<dt><code>EACCES</code></dt>
+<dt><code>EEXIST</code></dt>
+<dt><code>ENOSPC</code></dt>
+<dt><code>ENOSYS</code></dt>
+<dt><code>EBUSY</code></dt>
+<dt><code>ENOENT</code></dt>
+<dt><code>EPERM</code></dt>
+<dt><code>EPIPE</code></dt>
+</dl>
+
+</dd>
+<dt><code>strerror(errno)</code></dt>
+<dd><p>Return a string that describes the error <code>errno</code>.
+</p>
+</dd>
 <dt><code>gc()</code></dt>
 <dd><p>Manually invoke the cycle removal algorithm. The cycle removal
 algorithm is automatically started when needed, so this function is
@ -614,12 +626,14 @@ optional properties:
 </p>
 </dd>
 <dt><code>full</code></dt>
-<dd><p>Boolean (default = false). If true, return the an object contains
+<dd>  
+<p>Boolean (default = false). If true, return the an object contains
  the properties <code>response</code> (response content),
  <code>responseHeaders</code> (headers separated by CRLF), <code>status</code>
-  (status code). If <code>full</code> is false, only the response is
-  returned if the status is between 200 and 299. Otherwise an
-  <code>std.Error</code> exception is raised.
+  (status code). <code>response</code> is <code>null</code> is case of protocol or
+  network error. If <code>full</code> is false, only the response is
+  returned if the status is between 200 and 299. Otherwise <code>null</code>
+  is returned.
 </p>
 </dd>
 </dl>
@ -631,7 +645,7 @@ optional properties:
 </p>
 <dl compact="compact">
 <dt><code>close()</code></dt>
-<dd><p>Close the file.
+<dd><p>Close the file. Return 0 if OK or <code>-errno</code> in case of I/O error.
 </p></dd>
 <dt><code>puts(str)</code></dt>
 <dd><p>Outputs the string with the UTF-8 encoding.
@ -643,17 +657,27 @@ optional properties:
 <dd><p>Flush the buffered file.
 </p></dd>
 <dt><code>seek(offset, whence)</code></dt>
-<dd><p>Seek to a give file position (whence is <code>std.SEEK_*</code>). Throws a
-<code>std.Error</code> in case of I/O error.
+<dd><p>Seek to a give file position (whence is
+<code>std.SEEK_*</code>). <code>offset</code> can be a number or a bigint. Return
+0 if OK or <code>-errno</code> in case of I/O error.
 </p></dd>
 <dt><code>tell()</code></dt>
 <dd><p>Return the current file position.
 </p></dd>
+<dt><code>tello()</code></dt>
+<dd><p>Return the current file position as a bigint.
+</p></dd>
 <dt><code>eof()</code></dt>
 <dd><p>Return true if end of file.
 </p></dd>
 <dt><code>fileno()</code></dt>
 <dd><p>Return the associated OS handle.
+</p></dd>
+<dt><code>error()</code></dt>
+<dd><p>Return true if there was an error.
+</p></dd>
+<dt><code>clearerr()</code></dt>
+<dd><p>Clear the error indication.
 </p>
 </dd>
 <dt><code>read(buffer, position, length)</code></dt>
@ -727,7 +751,9 @@ error code.
 </p>
 </dd>
 <dt><code>seek(fd, offset, whence)</code></dt>
-<dd><p>Seek in the file. Use <code>std.SEEK_*</code> for <code>whence</code>.
+<dd><p>Seek in the file. Use <code>std.SEEK_*</code> for
+<code>whence</code>. <code>offset</code> is either a number or a bigint. If
+<code>offset</code> is a bigint, a bigint is returned too.
 </p>
 </dd>
 <dt><code>read(fd, buffer, offset, length)</code></dt>
@ -755,11 +781,11 @@ Return the number of written bytes or &lt; 0 if error.
 </p>
 </dd>
 <dt><code>remove(filename)</code></dt>
-<dd><p>Remove a file. Return 0 if OK or &lt; 0 if error.
+<dd><p>Remove a file. Return 0 if OK or <code>-errno</code>.
 </p>
 </dd>
 <dt><code>rename(oldname, newname)</code></dt>
-<dd><p>Rename a file. Return 0 if OK or &lt; 0 if error.
+<dd><p>Rename a file. Return 0 if OK or <code>-errno</code>.
 </p>
 </dd>
 <dt><code>realpath(path)</code></dt>
@ -773,11 +799,11 @@ and <code>err</code> the error code.
 </p>
 </dd>
 <dt><code>chdir(path)</code></dt>
-<dd><p>Change the current directory. Return the error code.
+<dd><p>Change the current directory. Return 0 if OK or <code>-errno</code>.
 </p>
 </dd>
 <dt><code>mkdir(path, mode = 0o777)</code></dt>
-<dd><p>Create a directory at <code>path</code>. Return the error code.
+<dd><p>Create a directory at <code>path</code>. Return 0 if OK or <code>-errno</code>.
 </p>
 </dd>
 <dt><code>stat(path)</code></dt>
@ -809,11 +835,11 @@ itself.
 </dd>
 <dt><code>utimes(path, atime, mtime)</code></dt>
 <dd><p>Change the access and modification times of the file <code>path</code>. The
-times are specified in milliseconds since 1970.
+times are specified in milliseconds since 1970. Return 0 if OK or <code>-errno</code>.
 </p>
 </dd>
 <dt><code>symlink(target, linkpath)</code></dt>
-<dd><p>Create a link at <code>linkpath</code> containing the string <code>target</code>.
+<dd><p>Create a link at <code>linkpath</code> containing the string <code>target</code>. Return 0 if OK or <code>-errno</code>.
 </p>
 </dd>
 <dt><code>readlink(path)</code></dt>
@ -896,7 +922,8 @@ object containing optional parameters:

 </dd>
 <dt><code>waitpid(pid, options)</code></dt>
-<dd><p><code>waitpid</code> Unix system call. Return the array <code>[ret, status]</code>.
+<dd><p><code>waitpid</code> Unix system call. Return the array <code>[ret,
+status]</code>. <code>ret</code> contains <code>-errno</code> in case of error.
 </p>
 </dd>
 <dt><code>WNOHANG</code></dt>
--- a/doc/quickjs.pdf
+++ b/doc/quickjs.pdf
--- a/doc/quickjs.texi
+++ b/doc/quickjs.texi
@ -373,44 +373,35 @@ optional properties:
@item loadScript(filename)
 Evaluate the file @code{filename} as a script (global eval).

-@item Error(errno)
+@item loadFile(filename)
+Load the file @code{filename} and return it as a string assuming UTF-8
+encoding. Return @code{null} in case of I/O error.

-@code{std.Error} constructor. Error instances contain the field
-@code{errno} (error code) and @code{message} (result of
-@code{std.Error.strerror(errno)}).
+@item open(filename, flags, errorObj = undefined)
+Open a file (wrapper to the libc @code{fopen()}). Return the FILE
+object or @code{null} in case of I/O error. If @code{errorObj} is not
+undefined, set its @code{errno} property to the error code or to 0 if
+no error occured.

-The constructor contains the following fields:
+@item popen(command, flags, errorObj = undefined)
+Open a process by creating a pipe (wrapper to the libc
+@code{popen()}). Return the FILE
+object or @code{null} in case of I/O error. If @code{errorObj} is not
+undefined, set its @code{errno} property to the error code or to 0 if
+no error occured.

-  @table @code
-  @item EINVAL
-  @item EIO
-  @item EACCES
-  @item EEXIST
-  @item ENOSPC
-  @item ENOSYS
-  @item EBUSY
-  @item ENOENT
-  @item EPERM
-  @item EPIPE
-    Integer value of common errors (additional error codes may be defined).
-  @item strerror(errno)
-    Return a string that describes the error @code{errno}.
-  @end table
-
-@item open(filename, flags)
-Open a file (wrapper to the libc @code{fopen()}). Throws 
-@code{std.Error} in case of I/O error.
-
-@item popen(command, flags)
-Open a process by creating a pipe (wrapper to the libc @code{popen()}). Throws 
-@code{std.Error} in case of I/O error.
-
-@item fdopen(fd, flags)
+@item fdopen(fd, flags, errorObj = undefined)
 Open a file from a file handle (wrapper to the libc
-@code{fdopen()}). Throws @code{std.Error} in case of I/O error.
+@code{fdopen()}). Return the FILE
+object or @code{null} in case of I/O error. If @code{errorObj} is not
+undefined, set its @code{errno} property to the error code or to 0 if
+no error occured.

-@item tmpfile()
-Open a temporary file. Throws @code{std.Error} in case of I/O error.
+@item tmpfile(errorObj = undefined)
+Open a temporary file. Return the FILE
+object or @code{null} in case of I/O error. If @code{errorObj} is not
+undefined, set its @code{errno} property to the error code or to 0 if
+no error occured.

@item puts(str)
 Equivalent to @code{std.out.puts(str)}.
@ -431,6 +422,27 @@ Wrappers to the libc file @code{stdin}, @code{stdout}, @code{stderr}.
@item SEEK_END
 Constants for seek().

+@item Error
+
+Enumeration object containing the integer value of common errors
+(additional error codes may be defined):
+
+  @table @code
+  @item EINVAL
+  @item EIO
+  @item EACCES
+  @item EEXIST
+  @item ENOSPC
+  @item ENOSYS
+  @item EBUSY
+  @item ENOENT
+  @item EPERM
+  @item EPIPE
+  @end table
+
+@item strerror(errno)
+Return a string that describes the error @code{errno}.
+
@item gc()
 Manually invoke the cycle removal algorithm. The cycle removal
 algorithm is automatically started when needed, so this function is
@ -453,12 +465,14 @@ optional properties:
  to be UTF-8 encoded.

  @item full
+  
  Boolean (default = false). If true, return the an object contains
  the properties @code{response} (response content),
  @code{responseHeaders} (headers separated by CRLF), @code{status}
-  (status code). If @code{full} is false, only the response is
-  returned if the status is between 200 and 299. Otherwise an
-  @code{std.Error} exception is raised.
+  (status code). @code{response} is @code{null} is case of protocol or
+  network error. If @code{full} is false, only the response is
+  returned if the status is between 200 and 299. Otherwise @code{null}
+  is returned.

  @end table

@ -468,7 +482,7 @@ FILE prototype:

@table @code
@item close()
-Close the file.
+Close the file. Return 0 if OK or @code{-errno} in case of I/O error.
@item puts(str)
 Outputs the string with the UTF-8 encoding.
@item printf(fmt, ...args)
@ -476,14 +490,21 @@ Formatted printf, same formats as the libc printf.
@item flush()
 Flush the buffered file.
@item seek(offset, whence)
-Seek to a give file position (whence is @code{std.SEEK_*}). Throws a
-@code{std.Error} in case of I/O error.
+Seek to a give file position (whence is
+@code{std.SEEK_*}). @code{offset} can be a number or a bigint. Return
+0 if OK or @code{-errno} in case of I/O error.
@item tell()
 Return the current file position.
+@item tello()
+Return the current file position as a bigint.
@item eof()
 Return true if end of file.
@item fileno()
 Return the associated OS handle.
+@item error()
+Return true if there was an error.
+@item clearerr()
+Clear the error indication.

@item read(buffer, position, length)
 Read @code{length} bytes from the file to the ArrayBuffer @code{buffer} at byte
@ -545,7 +566,9 @@ POSIX open flags.
 Close the file handle @code{fd}.

@item seek(fd, offset, whence)
-Seek in the file. Use @code{std.SEEK_*} for @code{whence}.
+Seek in the file. Use @code{std.SEEK_*} for
+@code{whence}. @code{offset} is either a number or a bigint. If
+@code{offset} is a bigint, a bigint is returned too.

@item read(fd, buffer, offset, length)
 Read @code{length} bytes from the file handle @code{fd} to the
@ -567,10 +590,10 @@ Return the TTY size as @code{[width, height]} or @code{null} if not available.
 Set the TTY in raw mode.

@item remove(filename)
-Remove a file. Return 0 if OK or < 0 if error.
+Remove a file. Return 0 if OK or @code{-errno}.

@item rename(oldname, newname)
-Rename a file. Return 0 if OK or < 0 if error.
+Rename a file. Return 0 if OK or @code{-errno}.

@item realpath(path)
 Return @code{[str, err]} where @code{str} is the canonicalized absolute
@ -581,10 +604,10 @@ Return @code{[str, err]} where @code{str} is the current working directory
 and @code{err} the error code.

@item chdir(path)
-Change the current directory. Return the error code.
+Change the current directory. Return 0 if OK or @code{-errno}.

@item mkdir(path, mode = 0o777)
-Create a directory at @code{path}. Return the error code.
+Create a directory at @code{path}. Return 0 if OK or @code{-errno}.

@item stat(path)
@item lstat(path)
@ -613,10 +636,10 @@ Constants to interpret the @code{mode} property returned by

@item utimes(path, atime, mtime)
 Change the access and modification times of the file @code{path}. The
-times are specified in milliseconds since 1970.
+times are specified in milliseconds since 1970. Return 0 if OK or @code{-errno}.

@item symlink(target, linkpath)
-Create a link at @code{linkpath} containing the string @code{target}.
+Create a link at @code{linkpath} containing the string @code{target}. Return 0 if OK or @code{-errno}.

@item readlink(path)
 Return @code{[str, err]} where @code{str} is the link target and @code{err}
@ -685,7 +708,8 @@ object containing optional parameters:
  @end table

@item waitpid(pid, options)
-@code{waitpid} Unix system call. Return the array @code{[ret, status]}.
+@code{waitpid} Unix system call. Return the array @code{[ret,
+status]}. @code{ret} contains @code{-errno} in case of error.

@item WNOHANG
 Constant for the @code{options} argument of @code{waitpid}.
--- a/libbf.c
+++ b/libbf.c
@ -2526,19 +2526,18 @@ fail:
    return BF_ST_MEM_ERROR;
 }

-/* The rounding mode is always BF_RNDZ. Return BF_ST_OVERFLOW if there
+/* The rounding mode is always BF_RNDZ. Return BF_ST_INVALID_OP if there
   is an overflow and 0 otherwise. */
 int bf_get_int32(int *pres, const bf_t *a, int flags)
 {
    uint32_t v;
    int ret;
    if (a->expn >= BF_EXP_INF) {
-        ret = 0;
+        ret = BF_ST_INVALID_OP;
        if (flags & BF_GET_INT_MOD) {
            v = 0;
        } else if (a->expn == BF_EXP_INF) {
            v = (uint32_t)INT32_MAX + a->sign;
-            /* XXX: return overflow ? */
        } else {
            v = INT32_MAX;
        }
@ -2551,7 +2550,7 @@ int bf_get_int32(int *pres, const bf_t *a, int flags)
            v = -v;
        ret = 0;
    } else if (!(flags & BF_GET_INT_MOD)) {
-        ret = BF_ST_OVERFLOW;
+        ret = BF_ST_INVALID_OP;
        if (a->sign) {
            v = (uint32_t)INT32_MAX + 1;
            if (a->expn == 32 && 
@ -2571,14 +2570,14 @@ int bf_get_int32(int *pres, const bf_t *a, int flags)
    return ret;
 }

-/* The rounding mode is always BF_RNDZ. Return BF_ST_OVERFLOW if there
+/* The rounding mode is always BF_RNDZ. Return BF_ST_INVALID_OP if there
   is an overflow and 0 otherwise. */
 int bf_get_int64(int64_t *pres, const bf_t *a, int flags)
 {
    uint64_t v;
    int ret;
    if (a->expn >= BF_EXP_INF) {
-        ret = 0;
+        ret = BF_ST_INVALID_OP;
        if (flags & BF_GET_INT_MOD) {
            v = 0;
        } else if (a->expn == BF_EXP_INF) {
@ -2603,7 +2602,7 @@ int bf_get_int64(int64_t *pres, const bf_t *a, int flags)
            v = -v;
        ret = 0;
    } else if (!(flags & BF_GET_INT_MOD)) {
-        ret = BF_ST_OVERFLOW;
+        ret = BF_ST_INVALID_OP;
        if (a->sign) {
            uint64_t v1;
            v = (uint64_t)INT64_MAX + 1;
@ -2632,6 +2631,40 @@ int bf_get_int64(int64_t *pres, const bf_t *a, int flags)
    return ret;
 }

+/* The rounding mode is always BF_RNDZ. Return BF_ST_INVALID_OP if there
+   is an overflow and 0 otherwise. */
+int bf_get_uint64(uint64_t *pres, const bf_t *a)
+{
+    uint64_t v;
+    int ret;
+    if (a->expn == BF_EXP_NAN) {
+        goto overflow;
+    } else if (a->expn <= 0) {
+        v = 0;
+        ret = 0;
+    } else if (a->sign) {
+        v = 0;
+        ret = BF_ST_INVALID_OP;
+    } else if (a->expn <= 64) {
+#if LIMB_BITS == 32
+        if (a->expn <= 32)
+            v = a->tab[a->len - 1] >> (LIMB_BITS - a->expn);
+        else
+            v = (((uint64_t)a->tab[a->len - 1] << 32) |
+                 get_limbz(a, a->len - 2)) >> (64 - a->expn);
+#else
+        v = a->tab[a->len - 1] >> (LIMB_BITS - a->expn);
+#endif
+        ret = 0;
+    } else {
+    overflow:
+        v = UINT64_MAX;
+        ret = BF_ST_INVALID_OP;
+    }
+    *pres = v;
+    return ret;
+}
+
 /* base conversion from radix */

 static const uint8_t digits_per_limb_table[BF_RADIX_MAX - 1] = {
--- a/libbf.h
+++ b/libbf.h
@ -376,6 +376,7 @@ char *bf_ftoa(size_t *plen, const bf_t *a, int radix, limb_t prec,
 #define BF_GET_INT_MOD (1 << 0) 
 int bf_get_int32(int *pres, const bf_t *a, int flags);
 int bf_get_int64(int64_t *pres, const bf_t *a, int flags);
+int bf_get_uint64(uint64_t *pres, const bf_t *a);

 /* the following functions are exported for testing only. */
 void mp_print_str(const char *str, const limb_t *tab, limb_t n);
--- a/libregexp.c
+++ b/libregexp.c
@ -434,8 +434,9 @@ static int __attribute__((format(printf, 2, 3))) re_parse_error(REParseState *s,
    return -1;
 }

-/* Return -1 in case of overflow */
-static int parse_digits(const uint8_t **pp)
+/* If allow_overflow is false, return -1 in case of
+   overflow. Otherwise return INT32_MAX. */
+static int parse_digits(const uint8_t **pp, BOOL allow_overflow)
 {
    const uint8_t *p;
    uint64_t v;
@ -448,8 +449,12 @@ static int parse_digits(const uint8_t **pp)
        if (c < '0' || c > '9')
            break;
        v = v * 10 + c - '0';
-        if (v >= INT32_MAX)
+        if (v >= INT32_MAX) {
+            if (allow_overflow)
+                v = INT32_MAX;
+            else
                return -1;
+        }
        p++;
    }
    *pp = p;
@ -1225,14 +1230,27 @@ static int re_parse_term(REParseState *s, BOOL is_backward_dir)
            re_emit_op(s, REOP_prev);
        break;
    case '{':
-        /* As an extension (see ES6 annex B), we accept '{' not
-           followed by digits as a normal atom */
-        if (!is_digit(p[1])) {
-            if (s->is_utf16)
-                goto invalid_quant_count;
+        if (s->is_utf16) {
+            return re_parse_error(s, "syntax error");
+        } else if (!is_digit(p[1])) {
+            /* Annex B: we accept '{' not followed by digits as a
+               normal atom */
+            goto parse_class_atom;
+        } else {
+            const uint8_t *p1 = p + 1;
+            /* Annex B: error if it is like a repetition count */
+            parse_digits(&p1, TRUE);
+            if (*p1 == ',') {
+                p1++;
+                if (is_digit(*p1)) {
+                    parse_digits(&p1, TRUE);
+                }
+            }
+            if (*p1 != '}') {
                goto parse_class_atom;
            }
-        /* fall tru */
+        }
+        /* fall thru */
    case '*':
    case '+':
    case '?':
@ -1387,7 +1405,7 @@ static int re_parse_term(REParseState *s, BOOL is_backward_dir)
            {
                const uint8_t *q = ++p;
                
-                c = parse_digits(&p);
+                c = parse_digits(&p, FALSE);
                if (c < 0 || (c >= s->capture_count && c >= re_count_captures(s))) {
                    if (!s->is_utf16) {
                        /* Annex B.1.4: accept legacy octal */
@ -1484,6 +1502,8 @@ static int re_parse_term(REParseState *s, BOOL is_backward_dir)
            quant_max = 1;
            goto quantifier;
        case '{':
+            {
+                const uint8_t *p1 = p;
                /* As an extension (see ES6 annex B), we accept '{' not
                   followed by digits as a normal atom */
                if (!is_digit(p[1])) {
@ -1492,24 +1512,28 @@ static int re_parse_term(REParseState *s, BOOL is_backward_dir)
                    break;
                }
                p++;
-            quant_min = parse_digits(&p);
-            if (quant_min < 0) {
-            invalid_quant_count:
-                return re_parse_error(s, "invalid repetition count");
-            }
+                quant_min = parse_digits(&p, TRUE);
                quant_max = quant_min;
                if (*p == ',') {
                    p++;
                    if (is_digit(*p)) {
-                    quant_max = parse_digits(&p);
-                    if (quant_max < 0 || quant_max < quant_min)
-                        goto invalid_quant_count;
+                        quant_max = parse_digits(&p, TRUE);
+                        if (quant_max < quant_min) {
+                        invalid_quant_count:
+                            return re_parse_error(s, "invalid repetition count");
+                        }
                    } else {
                        quant_max = INT32_MAX; /* infinity */
                    }
                }
+                if (*p != '}' && !s->is_utf16) {
+                    /* Annex B: normal atom if invalid '{' syntax */
+                    p = p1;
+                    break;
+                }
                if (re_parse_expect(s, &p, '}'))
                    return -1;
+            }
        quantifier:
            greedy = TRUE;
            if (*p == '?') {
--- a/libunicode-table.h
+++ b/libunicode-table.h
--- a/quickjs-libc.c
+++ b/quickjs-libc.c
@ -224,17 +224,15 @@ static JSValue js_printf_internal(JSContext *ctx,
                case 'X':
                    if (i >= argc)
                        goto missing;
-                    if (modsize > 0) {
-                        if (JS_ToInt64(ctx, &int64_arg, argv[i++]))
+                    if (JS_ToInt64Ext(ctx, &int64_arg, argv[i++]))
                        goto fail;
+                    if (modsize > 0) {
                        q[1] = q[-1];
                        q[-1] = q[0] = 'l';
                        q[2] = '\0';
                        dbuf_printf_fun(&dbuf, fmtbuf, (long long)int64_arg);
                    } else {
-                        if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
-                            goto fail;
-                        dbuf_printf_fun(&dbuf, fmtbuf, int32_arg);
+                        dbuf_printf_fun(&dbuf, fmtbuf, (int)int64_arg);
                    }
                    break;

@ -369,6 +367,27 @@ static JSValue js_loadScript(JSContext *ctx, JSValueConst this_val,
    return ret;
 }

+/* load a file as a UTF-8 encoded string */
+static JSValue js_std_loadFile(JSContext *ctx, JSValueConst this_val,
+                               int argc, JSValueConst *argv)
+{
+    uint8_t *buf;
+    const char *filename;
+    JSValue ret;
+    size_t buf_len;
+    
+    filename = JS_ToCString(ctx, argv[0]);
+    if (!filename)
+        return JS_EXCEPTION;
+    buf = js_load_file(ctx, &buf_len, filename);
+    JS_FreeCString(ctx, filename);
+    if (!buf)
+        return JS_NULL;
+    ret = JS_NewStringLen(ctx, (char *)buf, buf_len);
+    js_free(ctx, buf);
+    return ret;
+}
+
 typedef JSModuleDef *(JSInitModuleFunc)(JSContext *ctx,
                                        const char *module_name);

@ -633,30 +652,14 @@ static void js_std_file_finalizer(JSRuntime *rt, JSValue val)
    }
 }

-static JSValue js_new_std_error(JSContext *ctx, int err)
+static ssize_t js_get_errno(ssize_t ret)
 {
-    JSValue obj;
-    /* XXX: could add a specific Error prototype */
-    obj = JS_NewError(ctx);
-    JS_DefinePropertyValueStr(ctx, obj, "message",
-                              JS_NewString(ctx, strerror(err)),
-                              JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
-    JS_DefinePropertyValueStr(ctx, obj, "errno",
-                              JS_NewInt32(ctx, err),
-                              JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
-    return obj;
+    if (ret == -1)
+        ret = -errno;
+    return ret;
 }

-static JSValue js_std_error_constructor(JSContext *ctx, JSValueConst new_target,
-                                        int argc, JSValueConst *argv)
-{
-    int err;
-    if (JS_ToInt32(ctx, &err, argv[0]))
-        return JS_EXCEPTION;
-    return js_new_std_error(ctx, err);
-}
-
-static JSValue js_std_error_strerror(JSContext *ctx, JSValueConst this_val,
+static JSValue js_std_strerror(JSContext *ctx, JSValueConst this_val,
                                     int argc, JSValueConst *argv)
 {
    int err;
@ -665,15 +668,6 @@ static JSValue js_std_error_strerror(JSContext *ctx, JSValueConst this_val,
    return JS_NewString(ctx, strerror(err));
 }

-static JSValue js_std_throw_errno(JSContext *ctx, int err)
-{
-    JSValue obj;
-    obj = js_new_std_error(ctx, err);
-    if (JS_IsException(obj))
-        obj = JS_NULL;
-    return JS_Throw(ctx, obj);
-}
-
 static JSValue js_new_std_file(JSContext *ctx, FILE *f,
                               BOOL close_in_finalizer,
                               BOOL is_popen)
@ -695,11 +689,19 @@ static JSValue js_new_std_file(JSContext *ctx, FILE *f,
    return obj;
 }

+static void js_set_error_object(JSContext *ctx, JSValue obj, int err)
+{
+    if (!JS_IsUndefined(obj)) {
+        JS_SetPropertyStr(ctx, obj, "errno", JS_NewInt32(ctx, err));
+    }
+}
+
 static JSValue js_std_open(JSContext *ctx, JSValueConst this_val,
                           int argc, JSValueConst *argv)
 {
    const char *filename, *mode = NULL;
    FILE *f;
+    int err;
    
    filename = JS_ToCString(ctx, argv[0]);
    if (!filename)
@ -708,15 +710,21 @@ static JSValue js_std_open(JSContext *ctx, JSValueConst this_val,
    if (!mode)
        goto fail;
    if (mode[strspn(mode, "rwa+b")] != '\0') {
-        js_std_throw_errno(ctx, EINVAL);
+        JS_ThrowTypeError(ctx, "invalid file mode");
        goto fail;
    }

    f = fopen(filename, mode);
+    if (!f)
+        err = errno;
+    else
+        err = 0;
+    if (argc >= 3)
+        js_set_error_object(ctx, argv[2], err);
    JS_FreeCString(ctx, filename);
    JS_FreeCString(ctx, mode);
    if (!f)
-        return js_std_throw_errno(ctx, errno);
+        return JS_NULL;
    return js_new_std_file(ctx, f, TRUE, FALSE);
 fail:
    JS_FreeCString(ctx, filename);
@ -729,6 +737,7 @@ static JSValue js_std_popen(JSContext *ctx, JSValueConst this_val,
 {
    const char *filename, *mode = NULL;
    FILE *f;
+    int err;
    
    filename = JS_ToCString(ctx, argv[0]);
    if (!filename)
@ -737,15 +746,21 @@ static JSValue js_std_popen(JSContext *ctx, JSValueConst this_val,
    if (!mode)
        goto fail;
    if (mode[strspn(mode, "rw")] != '\0') {
-        js_std_throw_errno(ctx, EINVAL);
+        JS_ThrowTypeError(ctx, "invalid file mode");
        goto fail;
    }

    f = popen(filename, mode);
+    if (!f)
+        err = errno;
+    else
+        err = 0;
+    if (argc >= 3)
+        js_set_error_object(ctx, argv[2], err);
    JS_FreeCString(ctx, filename);
    JS_FreeCString(ctx, mode);
    if (!f)
-        return js_std_throw_errno(ctx, errno);
+        return JS_NULL;
    return js_new_std_file(ctx, f, TRUE, TRUE);
 fail:
    JS_FreeCString(ctx, filename);
@ -758,7 +773,7 @@ static JSValue js_std_fdopen(JSContext *ctx, JSValueConst this_val,
 {
    const char *mode;
    FILE *f;
-    int fd;
+    int fd, err;

    if (JS_ToInt32(ctx, &fd, argv[0]))
        return JS_EXCEPTION;
@ -766,14 +781,20 @@ static JSValue js_std_fdopen(JSContext *ctx, JSValueConst this_val,
    if (!mode)
        goto fail;
    if (mode[strspn(mode, "rwa+")] != '\0') {
-        js_std_throw_errno(ctx, EINVAL);
+        JS_ThrowTypeError(ctx, "invalid file mode");
        goto fail;
    }

    f = fdopen(fd, mode);
+    if (!f)
+        err = errno;
+    else
+        err = 0;
+    if (argc >= 3)
+        js_set_error_object(ctx, argv[2], err);
    JS_FreeCString(ctx, mode);
    if (!f)
-        return js_std_throw_errno(ctx, errno);
+        return JS_NULL;
    return js_new_std_file(ctx, f, TRUE, FALSE);
 fail:
    JS_FreeCString(ctx, mode);
@ -785,8 +806,10 @@ static JSValue js_std_tmpfile(JSContext *ctx, JSValueConst this_val,
 {
    FILE *f;
    f = tmpfile();
+    if (argc >= 1)
+        js_set_error_object(ctx, argv[0], f ? 0 : errno);
    if (!f)
-        return js_std_throw_errno(ctx, errno);
+        return JS_NULL;
    return js_new_std_file(ctx, f, TRUE, FALSE);
 }

@ -808,7 +831,7 @@ static FILE *js_std_file_get(JSContext *ctx, JSValueConst obj)
    if (!s)
        return NULL;
    if (!s->f) {
-        js_std_throw_errno(ctx, EBADF);
+        JS_ThrowTypeError(ctx, "invalid file handle");
        return NULL;
    }
    return s->f;
@ -843,17 +866,17 @@ static JSValue js_std_file_close(JSContext *ctx, JSValueConst this_val,
                                 int argc, JSValueConst *argv)
 {
    JSSTDFile *s = JS_GetOpaque2(ctx, this_val, js_std_file_class_id);
+    int err;
    if (!s)
        return JS_EXCEPTION;
    if (!s->f)
-        return js_std_throw_errno(ctx, EBADF);
-    /* XXX: could return exit code */
+        return JS_ThrowTypeError(ctx, "invalid file handle");
    if (s->is_popen)
-        pclose(s->f);
+        err = js_get_errno(pclose(s->f));
    else
-        fclose(s->f);
+        err = js_get_errno(fclose(s->f));
    s->f = NULL;
-    return JS_UNDEFINED;
+    return JS_NewInt32(ctx, err);
 }

 static JSValue js_std_file_printf(JSContext *ctx, JSValueConst this_val,
@ -876,7 +899,7 @@ static JSValue js_std_file_flush(JSContext *ctx, JSValueConst this_val,
 }

 static JSValue js_std_file_tell(JSContext *ctx, JSValueConst this_val,
-                                int argc, JSValueConst *argv)
+                                int argc, JSValueConst *argv, int is_bigint)
 {
    FILE *f = js_std_file_get(ctx, this_val);
    int64_t pos;
@ -887,6 +910,9 @@ static JSValue js_std_file_tell(JSContext *ctx, JSValueConst this_val,
 #else
    pos = ftell(f);
 #endif
+    if (is_bigint)
+        return JS_NewBigInt64(ctx, pos);
+    else
        return JS_NewInt64(ctx, pos);
 }

@ -898,7 +924,7 @@ static JSValue js_std_file_seek(JSContext *ctx, JSValueConst this_val,
    int whence, ret;
    if (!f)
        return JS_EXCEPTION;
-    if (JS_ToInt64(ctx, &pos, argv[0]))
+    if (JS_ToInt64Ext(ctx, &pos, argv[0]))
        return JS_EXCEPTION;
    if (JS_ToInt32(ctx, &whence, argv[1]))
        return JS_EXCEPTION;
@ -908,8 +934,8 @@ static JSValue js_std_file_seek(JSContext *ctx, JSValueConst this_val,
    ret = fseek(f, pos, whence);
 #endif
    if (ret < 0)
-        return js_std_throw_errno(ctx, EBADF);
-    return JS_UNDEFINED;
+        ret = -errno;
+    return JS_NewInt32(ctx, ret);
 }

 static JSValue js_std_file_eof(JSContext *ctx, JSValueConst this_val,
@ -921,6 +947,25 @@ static JSValue js_std_file_eof(JSContext *ctx, JSValueConst this_val,
    return JS_NewBool(ctx, feof(f));
 }

+static JSValue js_std_file_error(JSContext *ctx, JSValueConst this_val,
+                               int argc, JSValueConst *argv)
+{
+    FILE *f = js_std_file_get(ctx, this_val);
+    if (!f)
+        return JS_EXCEPTION;
+    return JS_NewBool(ctx, ferror(f));
+}
+
+static JSValue js_std_file_clearerr(JSContext *ctx, JSValueConst this_val,
+                                    int argc, JSValueConst *argv)
+{
+    FILE *f = js_std_file_get(ctx, this_val);
+    if (!f)
+        return JS_EXCEPTION;
+    clearerr(f);
+    return JS_UNDEFINED;
+}
+
 static JSValue js_std_file_fileno(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
 {
@ -1151,7 +1196,7 @@ static JSValue js_std_urlGet(JSContext *ctx, JSValueConst this_val,
    f = popen((char *)cmd_buf.buf, "r");
    dbuf_free(&cmd_buf);
    if (!f) {
-        return js_std_throw_errno(ctx, errno);
+        return JS_ThrowTypeError(ctx, "could not start curl");
    }

    js_std_dbuf_init(ctx, data_buf);
@ -1162,20 +1207,21 @@ static JSValue js_std_urlGet(JSContext *ctx, JSValueConst this_val,
        goto fail;

    /* get the HTTP status */
-    if (http_get_header_line(f, buf, URL_GET_BUF_SIZE, NULL) < 0)
+    if (http_get_header_line(f, buf, URL_GET_BUF_SIZE, NULL) < 0) {
+        status = 0;
        goto bad_header;
+    }
    status = http_get_status(buf);
    if (!full_flag && !(status >= 200 && status <= 299)) {
-        js_std_throw_errno(ctx, ENOENT);
-        goto fail;
+        goto bad_header;
    }
    
    /* wait until there is an empty line */
    for(;;) {
        if (http_get_header_line(f, buf, URL_GET_BUF_SIZE, header_buf) < 0) {
        bad_header:
-            js_std_throw_errno(ctx, EINVAL);
-            goto fail;
+            response = JS_NULL;
+            goto done;
        }
        if (!strcmp(buf, "\r\n"))
            break;
@ -1191,11 +1237,6 @@ static JSValue js_std_urlGet(JSContext *ctx, JSValueConst this_val,
            break;
        dbuf_put(data_buf, (uint8_t *)buf, len);
    }
-    js_free(ctx, buf);
-    buf = NULL;
-    pclose(f);
-    f = NULL;
-
    if (dbuf_error(data_buf))
        goto fail;
    if (binary_flag) {
@ -1204,10 +1245,15 @@ static JSValue js_std_urlGet(JSContext *ctx, JSValueConst this_val,
    } else {
        response = JS_NewStringLen(ctx, (char *)data_buf->buf, data_buf->size);
    }
-    dbuf_free(data_buf);
-    data_buf = NULL;
    if (JS_IsException(response))
        goto fail;
+ done:
+    js_free(ctx, buf);
+    buf = NULL;
+    pclose(f);
+    f = NULL;
+    dbuf_free(data_buf);
+    data_buf = NULL;

    if (full_flag) {
        ret_obj = JS_NewObject(ctx);
@ -1216,6 +1262,7 @@ static JSValue js_std_urlGet(JSContext *ctx, JSValueConst this_val,
        JS_DefinePropertyValueStr(ctx, ret_obj, "response",
                                  response,
                                  JS_PROP_C_W_E);
+        if (!JS_IsNull(response)) {
            JS_DefinePropertyValueStr(ctx, ret_obj, "responseHeaders",
                                      JS_NewStringLen(ctx, (char *)header_buf->buf,
                                                      header_buf->size),
@ -1223,6 +1270,7 @@ static JSValue js_std_urlGet(JSContext *ctx, JSValueConst this_val,
            JS_DefinePropertyValueStr(ctx, ret_obj, "status",
                                      JS_NewInt32(ctx, status),
                                      JS_PROP_C_W_E);
+        }
    } else {
        ret_obj = response;
    }
@ -1245,31 +1293,7 @@ static JSClassDef js_std_file_class = {
    .finalizer = js_std_file_finalizer,
 }; 

-static const JSCFunctionListEntry js_std_funcs[] = {
-    JS_CFUNC_DEF("exit", 1, js_std_exit ),
-    JS_CFUNC_DEF("gc", 0, js_std_gc ),
-    JS_CFUNC_DEF("evalScript", 1, js_evalScript ),
-    JS_CFUNC_DEF("loadScript", 1, js_loadScript ),
-    JS_CFUNC_DEF("getenv", 1, js_std_getenv ),
-    JS_CFUNC_DEF("urlGet", 1, js_std_urlGet ),
-
-    /* FILE I/O */
-    JS_CFUNC_DEF("open", 2, js_std_open ),
-    JS_CFUNC_DEF("popen", 2, js_std_popen ),
-    JS_CFUNC_DEF("fdopen", 2, js_std_fdopen ),
-    JS_CFUNC_DEF("tmpfile", 0, js_std_tmpfile ),
-    JS_CFUNC_MAGIC_DEF("puts", 1, js_std_file_puts, 0 ),
-    JS_CFUNC_DEF("printf", 1, js_std_printf ),
-    JS_CFUNC_DEF("sprintf", 1, js_std_sprintf ),
-    JS_PROP_INT32_DEF("SEEK_SET", SEEK_SET, JS_PROP_CONFIGURABLE ),
-    JS_PROP_INT32_DEF("SEEK_CUR", SEEK_CUR, JS_PROP_CONFIGURABLE ),
-    JS_PROP_INT32_DEF("SEEK_END", SEEK_END, JS_PROP_CONFIGURABLE ),
-
-    /* setenv, ... */
-};
-
-static const JSCFunctionListEntry js_std_error_funcs[] = {
-    JS_CFUNC_DEF("strerror", 1, js_std_error_strerror ),
+static const JSCFunctionListEntry js_std_error_props[] = {
    /* various errno values */
 #define DEF(x) JS_PROP_INT32_DEF(#x, x, JS_PROP_CONFIGURABLE )
    DEF(EINVAL),
@ -1286,27 +1310,55 @@ static const JSCFunctionListEntry js_std_error_funcs[] = {
 #undef DEF
 };

+static const JSCFunctionListEntry js_std_funcs[] = {
+    JS_CFUNC_DEF("exit", 1, js_std_exit ),
+    JS_CFUNC_DEF("gc", 0, js_std_gc ),
+    JS_CFUNC_DEF("evalScript", 1, js_evalScript ),
+    JS_CFUNC_DEF("loadScript", 1, js_loadScript ),
+    JS_CFUNC_DEF("getenv", 1, js_std_getenv ),
+    JS_CFUNC_DEF("urlGet", 1, js_std_urlGet ),
+    JS_CFUNC_DEF("loadFile", 1, js_std_loadFile ),
+    JS_CFUNC_DEF("strerror", 1, js_std_strerror ),
+    
+    /* FILE I/O */
+    JS_CFUNC_DEF("open", 2, js_std_open ),
+    JS_CFUNC_DEF("popen", 2, js_std_popen ),
+    JS_CFUNC_DEF("fdopen", 2, js_std_fdopen ),
+    JS_CFUNC_DEF("tmpfile", 0, js_std_tmpfile ),
+    JS_CFUNC_MAGIC_DEF("puts", 1, js_std_file_puts, 0 ),
+    JS_CFUNC_DEF("printf", 1, js_std_printf ),
+    JS_CFUNC_DEF("sprintf", 1, js_std_sprintf ),
+    JS_PROP_INT32_DEF("SEEK_SET", SEEK_SET, JS_PROP_CONFIGURABLE ),
+    JS_PROP_INT32_DEF("SEEK_CUR", SEEK_CUR, JS_PROP_CONFIGURABLE ),
+    JS_PROP_INT32_DEF("SEEK_END", SEEK_END, JS_PROP_CONFIGURABLE ),
+    JS_OBJECT_DEF("Error", js_std_error_props, countof(js_std_error_props), JS_PROP_CONFIGURABLE),
+    /* setenv, ... */
+};
+    
 static const JSCFunctionListEntry js_std_file_proto_funcs[] = {
    JS_CFUNC_DEF("close", 0, js_std_file_close ),
    JS_CFUNC_MAGIC_DEF("puts", 1, js_std_file_puts, 1 ),
    JS_CFUNC_DEF("printf", 1, js_std_file_printf ),
    JS_CFUNC_DEF("flush", 0, js_std_file_flush ),
-    JS_CFUNC_DEF("tell", 0, js_std_file_tell ),
+    JS_CFUNC_MAGIC_DEF("tell", 0, js_std_file_tell, 0 ),
+    JS_CFUNC_MAGIC_DEF("tello", 0, js_std_file_tell, 1 ),
    JS_CFUNC_DEF("seek", 2, js_std_file_seek ),
    JS_CFUNC_DEF("eof", 0, js_std_file_eof ),
    JS_CFUNC_DEF("fileno", 0, js_std_file_fileno ),
+    JS_CFUNC_DEF("error", 0, js_std_file_error ),
+    JS_CFUNC_DEF("clearerr", 0, js_std_file_clearerr ),
    JS_CFUNC_MAGIC_DEF("read", 3, js_std_file_read_write, 0 ),
    JS_CFUNC_MAGIC_DEF("write", 3, js_std_file_read_write, 1 ),
    JS_CFUNC_DEF("getline", 0, js_std_file_getline ),
    JS_CFUNC_DEF("readAsString", 0, js_std_file_readAsString ),
    JS_CFUNC_DEF("getByte", 0, js_std_file_getByte ),
    JS_CFUNC_DEF("putByte", 1, js_std_file_putByte ),
-    /* setvbuf, ferror, clearerr, ...  */
+    /* setvbuf, ...  */
 };

 static int js_std_init(JSContext *ctx, JSModuleDef *m)
 {
-    JSValue proto, obj;
+    JSValue proto;
    
    /* FILE class */
    /* the class ID is created once */
@ -1323,13 +1375,6 @@ static int js_std_init(JSContext *ctx, JSModuleDef *m)
    JS_SetModuleExport(ctx, m, "in", js_new_std_file(ctx, stdin, FALSE, FALSE));
    JS_SetModuleExport(ctx, m, "out", js_new_std_file(ctx, stdout, FALSE, FALSE));
    JS_SetModuleExport(ctx, m, "err", js_new_std_file(ctx, stderr, FALSE, FALSE));
-    
-    obj = JS_NewCFunction2(ctx, js_std_error_constructor,
-                           "Error", 1, JS_CFUNC_constructor, 0);
-    JS_SetPropertyFunctionList(ctx, obj, js_std_error_funcs,
-                               countof(js_std_error_funcs));
-    JS_SetModuleExport(ctx, m, "Error", obj);
-
    return 0;
 }

@ -1343,20 +1388,12 @@ JSModuleDef *js_init_module_std(JSContext *ctx, const char *module_name)
    JS_AddModuleExport(ctx, m, "in");
    JS_AddModuleExport(ctx, m, "out");
    JS_AddModuleExport(ctx, m, "err");
-    JS_AddModuleExport(ctx, m, "Error");
    return m;
 }

 /**********************************************************/
 /* 'os' object */

-static JSValue js_os_return(JSContext *ctx, ssize_t ret)
-{
-    if (ret < 0)
-        ret = -errno;
-    return JS_NewInt64(ctx, ret);
-}
-
 static JSValue js_os_open(JSContext *ctx, JSValueConst this_val,
                          int argc, JSValueConst *argv)
 {
@ -1382,9 +1419,9 @@ static JSValue js_os_open(JSContext *ctx, JSValueConst this_val,
    if (!(flags & O_TEXT))
        flags |= O_BINARY;
 #endif
-    ret = open(filename, flags, mode);
+    ret = js_get_errno(open(filename, flags, mode));
    JS_FreeCString(ctx, filename);
-    return js_os_return(ctx, ret);
+    return JS_NewInt32(ctx, ret);
 }

 static JSValue js_os_close(JSContext *ctx, JSValueConst this_val,
@ -1393,24 +1430,31 @@ static JSValue js_os_close(JSContext *ctx, JSValueConst this_val,
    int fd, ret;
    if (JS_ToInt32(ctx, &fd, argv[0]))
        return JS_EXCEPTION;
-    ret = close(fd);
-    return js_os_return(ctx, ret);
+    ret = js_get_errno(close(fd));
+    return JS_NewInt32(ctx, ret);
 }

 static JSValue js_os_seek(JSContext *ctx, JSValueConst this_val,
                          int argc, JSValueConst *argv)
 {
-    int fd, whence, ret;
-    int64_t pos;
+    int fd, whence;
+    int64_t pos, ret;
+    BOOL is_bigint;
    
    if (JS_ToInt32(ctx, &fd, argv[0]))
        return JS_EXCEPTION;
-    if (JS_ToInt64(ctx, &pos, argv[1]))
+    is_bigint = JS_IsBigInt(ctx, argv[1]);
+    if (JS_ToInt64Ext(ctx, &pos, argv[1]))
        return JS_EXCEPTION;
    if (JS_ToInt32(ctx, &whence, argv[2]))
        return JS_EXCEPTION;
    ret = lseek(fd, pos, whence);
-    return js_os_return(ctx, ret);
+    if (ret == -1)
+        ret = -errno;
+    if (is_bigint)
+        return JS_NewBigInt64(ctx, ret);
+    else
+        return JS_NewInt64(ctx, ret);
 }

 static JSValue js_os_read_write(JSContext *ctx, JSValueConst this_val,
@ -1434,10 +1478,10 @@ static JSValue js_os_read_write(JSContext *ctx, JSValueConst this_val,
    if (pos + len > size)
        return JS_ThrowRangeError(ctx, "read/write array buffer overflow");
    if (magic)
-        ret = write(fd, buf + pos, len);
+        ret = js_get_errno(write(fd, buf + pos, len));
    else
-        ret = read(fd, buf + pos, len);
-    return js_os_return(ctx, ret);
+        ret = js_get_errno(read(fd, buf + pos, len));
+    return JS_NewInt64(ctx, ret);
 }

 static JSValue js_os_isatty(JSContext *ctx, JSValueConst this_val,
@ -1555,9 +1599,9 @@ static JSValue js_os_remove(JSContext *ctx, JSValueConst this_val,
    filename = JS_ToCString(ctx, argv[0]);
    if (!filename)
        return JS_EXCEPTION;
-    ret = remove(filename);
+    ret = js_get_errno(remove(filename));
    JS_FreeCString(ctx, filename);
-    return js_os_return(ctx, ret);
+    return JS_NewInt32(ctx, ret);
 }

 static JSValue js_os_rename(JSContext *ctx, JSValueConst this_val,
@ -1574,10 +1618,10 @@ static JSValue js_os_rename(JSContext *ctx, JSValueConst this_val,
        JS_FreeCString(ctx, oldpath);
        return JS_EXCEPTION;
    }
-    ret = rename(oldpath, newpath);
+    ret = js_get_errno(rename(oldpath, newpath));
    JS_FreeCString(ctx, oldpath);
    JS_FreeCString(ctx, newpath);
-    return js_os_return(ctx, ret);
+    return JS_NewInt32(ctx, ret);
 }

 static JSOSRWHandler *find_rh(int fd)
@ -2018,7 +2062,7 @@ static JSValue js_os_getcwd(JSContext *ctx, JSValueConst this_val,
    
    if (!getcwd(buf, sizeof(buf))) {
        buf[0] = '\0';
-        err = -errno;
+        err = errno;
    } else {
        err = 0;
    }
@ -2036,9 +2080,9 @@ static JSValue js_os_chdir(JSContext *ctx, JSValueConst this_val,
    target = JS_ToCString(ctx, argv[0]);
    if (!target)
        return JS_EXCEPTION;
-    err = chdir(target);
+    err = js_get_errno(chdir(target));
    JS_FreeCString(ctx, target);
-    return js_os_return(ctx, err);
+    return JS_NewInt32(ctx, err);
 }

 /* return [path, errorcode] */
@ -2056,7 +2100,7 @@ static JSValue js_os_realpath(JSContext *ctx, JSValueConst this_val,
    JS_FreeCString(ctx, path);
    if (!res) {
        buf[0] = '\0';
-        err = -errno;
+        err = errno;
    } else {
        err = 0;
    }
@ -2078,9 +2122,9 @@ static JSValue js_os_mkdir(JSContext *ctx, JSValueConst this_val,
    path = JS_ToCString(ctx, argv[0]);
    if (!path)
        return JS_EXCEPTION;
-    ret = mkdir(path, mode);
+    ret = js_get_errno(mkdir(path, mode));
    JS_FreeCString(ctx, path);
-    return js_os_return(ctx, ret);
+    return JS_NewInt32(ctx, ret);
 }

 static int64_t timespec_to_ms(const struct timespec *tv)
@ -2106,7 +2150,7 @@ static JSValue js_os_stat(JSContext *ctx, JSValueConst this_val,
        res = stat(path, &st);
    JS_FreeCString(ctx, path);
    if (res < 0) {
-        err = -errno;
+        err = errno;
        obj = JS_NULL;
    } else {
        err = 0;
@ -2179,10 +2223,10 @@ static JSValue js_os_symlink(JSContext *ctx, JSValueConst this_val,
        JS_FreeCString(ctx, target);
        return JS_EXCEPTION;
    }
-    err = symlink(target, linkpath);
+    err = js_get_errno(symlink(target, linkpath));
    JS_FreeCString(ctx, target);
    JS_FreeCString(ctx, linkpath);
-    return js_os_return(ctx, err);
+    return JS_NewInt32(ctx, err);
 }

 /* return [path, errorcode] */
@ -2198,14 +2242,14 @@ static JSValue js_os_readlink(JSContext *ctx, JSValueConst this_val,
    if (!path)
        return JS_EXCEPTION;
    res = readlink(path, buf, sizeof(buf) - 1);
-    JS_FreeCString(ctx, path);
    if (res < 0) {
        buf[0] = '\0';
-        err = -errno;
+        err = errno;
    } else {
        buf[res] = '\0';
        err = 0;
    }
+    JS_FreeCString(ctx, path);
    return make_string_error(ctx, buf, err);
 }

@ -2229,18 +2273,19 @@ static JSValue js_os_readdir(JSContext *ctx, JSValueConst this_val,
        return JS_EXCEPTION;
    }
    f = opendir(path);
-    JS_FreeCString(ctx, path);
+    if (!f)
+        err = errno;
+    else
        err = 0;
-    if (!f) {
-        err = -errno;
+    JS_FreeCString(ctx, path);
+    if (!f)
        goto done;
-    }
    len = 0;
    for(;;) {
        errno = 0;
        d = readdir(f);
        if (!d) {
-            err = -errno;
+            err = errno;
            break;
        }
        JS_DefinePropertyValueUint32(ctx, obj, len++,
@ -2275,9 +2320,9 @@ static JSValue js_os_utimes(JSContext *ctx, JSValueConst this_val,
        return JS_EXCEPTION;
    ms_to_timeval(&times[0], atime);
    ms_to_timeval(&times[1], mtime);
-    ret = utimes(path, times);
+    ret = js_get_errno(utimes(path, times));
    JS_FreeCString(ctx, path);
-    return js_os_return(ctx, ret);
+    return JS_NewInt32(ctx, ret);
 }

 /* exec(args[, options]) -> exitcode */
@ -2486,8 +2531,8 @@ static JSValue js_os_kill(JSContext *ctx, JSValueConst this_val,
        return JS_EXCEPTION;
    if (JS_ToInt32(ctx, &sig, argv[1]))
        return JS_EXCEPTION;
-    ret = kill(pid, sig);
-    return js_os_return(ctx, ret);
+    ret = js_get_errno(kill(pid, sig));
+    return JS_NewInt32(ctx, ret);
 }

 /* sleep(delay_ms) */
@ -2502,8 +2547,8 @@ static JSValue js_os_sleep(JSContext *ctx, JSValueConst this_val,
        return JS_EXCEPTION;
    ts.tv_sec = delay / 1000;
    ts.tv_nsec = (delay % 1000) * 1000000;
-    ret = nanosleep(&ts, NULL);
-    return js_os_return(ctx, ret);
+    ret = js_get_errno(nanosleep(&ts, NULL));
+    return JS_NewInt32(ctx, ret);
 }

 /* dup(fd) */
@ -2514,8 +2559,8 @@ static JSValue js_os_dup(JSContext *ctx, JSValueConst this_val,
    
    if (JS_ToInt32(ctx, &fd, argv[0]))
        return JS_EXCEPTION;
-    ret = dup(fd);
-    return js_os_return(ctx, ret);
+    ret = js_get_errno(dup(fd));
+    return JS_NewInt32(ctx, ret);
 }

 /* dup2(fd) */
@ -2528,8 +2573,8 @@ static JSValue js_os_dup2(JSContext *ctx, JSValueConst this_val,
        return JS_EXCEPTION;
    if (JS_ToInt32(ctx, &fd2, argv[1]))
        return JS_EXCEPTION;
-    ret = dup2(fd, fd2);
-    return js_os_return(ctx, ret);
+    ret = js_get_errno(dup2(fd, fd2));
+    return JS_NewInt32(ctx, ret);
 }

 #endif /* !_WIN32 */
@ -2725,23 +2770,30 @@ void js_std_free_handlers(JSRuntime *rt)
    }
 }

-static void js_std_dump_error1(JSContext *ctx, JSValueConst exception_val,
-                               BOOL is_throw)
+static void js_dump_obj(JSContext *ctx, FILE *f, JSValueConst val)
+{
+    const char *str;
+    
+    str = JS_ToCString(ctx, val);
+    if (str) {
+        fprintf(f, "%s\n", str);
+        JS_FreeCString(ctx, str);
+    } else {
+        fprintf(f, "[exception]\n");
+    }
+}
+
+static void js_std_dump_error1(JSContext *ctx, JSValueConst exception_val)
 {
    JSValue val;
-    const char *stack;
    BOOL is_error;
    
    is_error = JS_IsError(ctx, exception_val);
-    if (is_throw && !is_error)
-        printf("Throw: ");
-    js_print(ctx, JS_NULL, 1, (JSValueConst *)&exception_val);
+    js_dump_obj(ctx, stderr, exception_val);
    if (is_error) {
        val = JS_GetPropertyStr(ctx, exception_val, "stack");
        if (!JS_IsUndefined(val)) {
-            stack = JS_ToCString(ctx, val);
-            printf("%s\n", stack);
-            JS_FreeCString(ctx, stack);
+            js_dump_obj(ctx, stderr, val);
        }
        JS_FreeValue(ctx, val);
    }
@ -2752,7 +2804,7 @@ void js_std_dump_error(JSContext *ctx)
    JSValue exception_val;
    
    exception_val = JS_GetException(ctx);
-    js_std_dump_error1(ctx, exception_val, TRUE);
+    js_std_dump_error1(ctx, exception_val);
    JS_FreeValue(ctx, exception_val);
 }

@ -2761,8 +2813,8 @@ void js_std_promise_rejection_tracker(JSContext *ctx, JSValueConst promise,
                                      BOOL is_handled, void *opaque)
 {
    if (!is_handled) {
-        printf("Possibly unhandled promise rejection: ");
-        js_std_dump_error1(ctx, reason, FALSE);
+        fprintf(stderr, "Possibly unhandled promise rejection: ");
+        js_std_dump_error1(ctx, reason);
    }
 }

--- a/quickjs-opcode.h
+++ b/quickjs-opcode.h
@ -119,7 +119,6 @@ DEF(           eval, 5, 1, 1, npop_u16) /* func args... -> ret_val */
 DEF(     apply_eval, 3, 2, 1, u16) /* func array -> ret_eval */
 DEF(         regexp, 1, 2, 1, none) /* create a RegExp object from the pattern and a
                                       bytecode string */
-DEF( get_super_ctor, 1, 1, 1, none)
 DEF(      get_super, 1, 1, 1, none)
 DEF(         import, 1, 1, 1, none) /* dynamic module import */

--- a/quickjs.c
+++ b/quickjs.c
@ -284,6 +284,7 @@ struct JSRuntime {
    JSNumericOperations bigdecimal_ops;
    uint32_t operator_count;
 #endif
+    void *user_opaque;
 };

 struct JSClass {
@ -1537,6 +1538,16 @@ JSRuntime *JS_NewRuntime2(const JSMallocFunctions *mf, void *opaque)
    return NULL;
 }

+void *JS_GetRuntimeOpaque(JSRuntime *rt)
+{
+    return rt->user_opaque;
+}
+
+void JS_SetRuntimeOpaque(JSRuntime *rt, void *opaque)
+{
+    rt->user_opaque = opaque;
+}
+
 /* default memory allocation functions with memory limitation */
 static inline size_t js_def_malloc_usable_size(void *ptr)
 {
@ -2198,26 +2209,6 @@ static inline BOOL is_math_mode(JSContext *ctx)
 }
 #endif

-JSValue JS_NewInt64(JSContext *ctx, int64_t v)
-{
-    if (v == (int32_t)v) {
-        return JS_NewInt32(ctx, v);
-    } else {
-        return __JS_NewFloat64(ctx, (double)v);
-    }
-}
-
-static force_inline JSValue JS_NewUint32(JSContext *ctx, uint32_t val)
-{
-    JSValue v;
-    if (val <= 0x7fffffff) {
-        v = JS_MKVAL(JS_TAG_INT, val);
-    } else {
-        v = __JS_NewFloat64(ctx, val);
-    }
-    return v;
-}
-
 /* JSAtom support */

 #define JS_ATOM_TAG_INT (1U << 31)
@ -9794,6 +9785,8 @@ static JSValue js_atof(JSContext *ctx, const char *str, const char **pp,
        if (*p == '.' && (p > p_start || to_digit((uint8_t)p[1]) < radix)) {
            is_float = TRUE;
            p++;
+            if (*p == sep)
+                goto fail;
            while (to_digit((uint8_t)*p) < radix ||
                   (*p == sep && to_digit((uint8_t)p[1]) < radix))
                p++;
@ -10129,7 +10122,6 @@ static __maybe_unused JSValue JS_ToIntegerFree(JSContext *ctx, JSValue val)
                ret = JS_NewInt32(ctx, 0);
            } else {
                /* convert -0 to +0 */
-                /* XXX: should not be done here ? */
                d = trunc(d) + 0.0;
                ret = JS_NewFloat64(ctx, d);
            }
@ -10385,6 +10377,14 @@ int JS_ToInt64(JSContext *ctx, int64_t *pres, JSValueConst val)
    return JS_ToInt64Free(ctx, pres, JS_DupValue(ctx, val));
 }

+int JS_ToInt64Ext(JSContext *ctx, int64_t *pres, JSValueConst val)
+{
+    if (JS_IsBigInt(ctx, val))
+        return JS_ToBigInt64(ctx, pres, val);
+    else
+        return JS_ToInt64(ctx, pres, val);
+}
+
 /* return (<0, 0) in case of exception */
 static int JS_ToInt32Free(JSContext *ctx, int32_t *pres, JSValue val)
 {
@ -11840,7 +11840,8 @@ static JSValue JS_CompactBigInt(JSContext *ctx, JSValue val)
 }

 /* must be kept in sync with JSOverloadableOperatorEnum */
-static const char *js_overloadable_operator_names[JS_OVOP_COUNT] = {
+/* XXX: use atoms ? */
+static const char js_overloadable_operator_names[JS_OVOP_COUNT][4] = {
    "+",
    "-",
    "*",
@ -12894,7 +12895,7 @@ static no_inline __exception int js_binary_arith_slow(JSContext *ctx, JSValue *s
    handle_bigint:
        if (ctx->rt->bigint_ops.binary_arith(ctx, op, sp - 2, op1, op2))
            goto exception;
-    } else if (tag1 == JS_TAG_FLOAT64 || tag2 == JS_TAG_FLOAT64) {
+    } else {
        double dr;
        /* float64 result */
        if (JS_ToFloat64Free(ctx, &d1, op1)) {
@ -13031,7 +13032,11 @@ static no_inline __exception int js_add_slow(JSContext *ctx, JSValue *sp)
    } else if (tag1 == JS_TAG_BIG_FLOAT || tag2 == JS_TAG_BIG_FLOAT) {
        if (ctx->rt->bigfloat_ops.binary_arith(ctx, OP_add, sp - 2, op1, op2))
            goto exception;
-    } else if (tag1 == JS_TAG_FLOAT64 || tag2 == JS_TAG_FLOAT64) {
+    } else if (tag1 == JS_TAG_BIG_INT || tag2 == JS_TAG_BIG_INT) {
+    handle_bigint:
+        if (ctx->rt->bigint_ops.binary_arith(ctx, OP_add, sp - 2, op1, op2))
+            goto exception;
+    } else {
        double d1, d2;
        /* float64 result */
        if (JS_ToFloat64Free(ctx, &d1, op1)) {
@ -13040,10 +13045,9 @@ static no_inline __exception int js_add_slow(JSContext *ctx, JSValue *sp)
        }
        if (JS_ToFloat64Free(ctx, &d2, op2))
            goto exception;
+        if (is_math_mode(ctx) && is_safe_integer(d1) && is_safe_integer(d2))
+            goto handle_bigint;
        sp[-2] = __JS_NewFloat64(ctx, d1 + d2);
-    } else {
-        if (ctx->rt->bigint_ops.binary_arith(ctx, OP_add, sp - 2, op1, op2))
-            goto exception;
    }
    return 0;
 exception:
@ -13642,6 +13646,28 @@ static no_inline int js_mul_pow10(JSContext *ctx, JSValue *sp)

 #else /* !CONFIG_BIGNUM */

+static JSValue JS_ThrowUnsupportedBigint(JSContext *ctx)
+{
+    return JS_ThrowTypeError(ctx, "bigint is not supported");
+}
+
+JSValue JS_NewBigInt64(JSContext *ctx, int64_t v)
+{
+    return JS_ThrowUnsupportedBigint(ctx);
+}
+
+JSValue JS_NewBigUint64(JSContext *ctx, uint64_t v)
+{
+    return JS_ThrowUnsupportedBigint(ctx);
+}
+
+int JS_ToBigInt64(JSContext *ctx, int64_t *pres, JSValueConst val)
+{
+    JS_ThrowUnsupportedBigint(ctx);
+    *pres = 0;
+    return -1;
+}
+
 static no_inline __exception int js_unary_arith_slow(JSContext *ctx,
                                                     JSValue *sp,
                                                     OPCodeEnum op)
@ -16280,22 +16306,6 @@ static JSValue JS_CallInternal(JSContext *ctx, JSValueConst func_obj,
            }
            BREAK;

-        CASE(OP_get_super_ctor):
-            {
-                JSValue proto;
-                proto = JS_DupValue(ctx, JS_GetPrototype(ctx, sp[-1]));
-                if (JS_IsException(proto))
-                    goto exception;
-                if (!JS_IsConstructor(ctx, proto)) {
-                    JS_FreeValue(ctx, proto);
-                    JS_ThrowTypeError(ctx, "not a constructor");
-                    goto exception;
-                }
-                JS_FreeValue(ctx, sp[-1]);
-                sp[-1] = proto;
-            }
-            BREAK;
-
        CASE(OP_get_super):
            {
                JSValue proto;
@ -23821,7 +23831,7 @@ static __exception int js_parse_postfix_expr(JSParseState *s, BOOL accept_lparen
                emit_atom(s, JS_ATOM_this_active_func);
                emit_u16(s, 0);

-                emit_op(s, OP_get_super_ctor);
+                emit_op(s, OP_get_super);

                emit_op(s, OP_scope_get_var);
                emit_atom(s, JS_ATOM_new_target);
@ -31993,11 +32003,11 @@ static __exception int js_parse_function_decl2(JSParseState *s,
                js_parse_expect(s, ')');
                goto fail;
            }
-            if (s->token.val == ',') {
-                if (next_token(s))
+            if (s->token.val == ')')
+                break;
+            if (js_parse_expect(s, ','))
                goto fail;
        }
-        }
        if ((func_type == JS_PARSE_FUNC_GETTER && fd->arg_count != 0) ||
            (func_type == JS_PARSE_FUNC_SETTER && fd->arg_count != 1)) {
            js_parse_error(s, "invalid number of arguments for getter or setter");
@ -34381,6 +34391,10 @@ int JS_SetModuleExportList(JSContext *ctx, JSModuleDef *m,
        case JS_DEF_PROP_DOUBLE:
            val = __JS_NewFloat64(ctx, e->u.f64);
            break;
+        case JS_DEF_OBJECT:
+            val = JS_NewObject(ctx);
+            JS_SetPropertyFunctionList(ctx, val, e->u.prop_list.tab, e->u.prop_list.len);
+            break;
        default:
            abort();
        }
@ -37357,7 +37371,8 @@ static int64_t JS_FlattenIntoArray(JSContext *ctx, JSValueConst target,
            JS_ThrowTypeError(ctx, "Array too long");
            goto fail;
        }
-        if (JS_SetPropertyInt64(ctx, target, targetIndex, element) < 0)
+        if (JS_DefinePropertyValueInt64(ctx, target, targetIndex, element,
+                                        JS_PROP_C_W_E | JS_PROP_THROW) < 0)
            return -1;
        targetIndex++;
    }
@ -37754,7 +37769,6 @@ static const JSCFunctionListEntry js_array_proto_funcs[] = {
    JS_CFUNC_DEF("copyWithin", 2, js_array_copyWithin ),
    JS_CFUNC_MAGIC_DEF("flatMap", 1, js_array_flatten, 1 ),
    JS_CFUNC_MAGIC_DEF("flat", 0, js_array_flatten, 0 ),
-    JS_CFUNC_MAGIC_DEF("flatten", 0, js_array_flatten, 0 ),
    JS_CFUNC_MAGIC_DEF("values", 0, js_create_array_iterator, JS_ITERATOR_KIND_VALUE ),
    JS_ALIAS_DEF("[Symbol.iterator]", "values" ),
    JS_CFUNC_MAGIC_DEF("keys", 0, js_create_array_iterator, JS_ITERATOR_KIND_KEY ),
@ -39918,14 +39932,36 @@ static JSValue js_math_hypot(JSContext *ctx, JSValueConst this_val,
        if (JS_ToFloat64(ctx, &b, argv[1]))
            return JS_EXCEPTION;
        r = hypot(a, b);
+    } else if (argc == 0) {
+        r = 0;
+    } else {
+        double *tab, a_max;
+        tab = js_malloc(ctx, sizeof(tab[0]) * argc);
+        if (!tab)
+            return JS_EXCEPTION;
+        /* avoid overflow by taking the maximum */
+        a_max = 0;
+        for(i = 0; i < argc; i++) {
+            if (JS_ToFloat64(ctx, &a, argv[i])) {
+                js_free(ctx, tab);
+                return JS_EXCEPTION;
+            }
+            a = fabs(a);
+            tab[i] = a;
+            if (a > a_max)
+                a_max = a;
+        }
+        if (a_max == 0 || !isfinite(a_max)) {
+            r = a_max;
        } else {
            r = 0;
            for(i = 0; i < argc; i++) {
-            if (JS_ToFloat64(ctx, &a, argv[i]))
-                return JS_EXCEPTION;
-            r += a;
+                a = tab[i] / a_max;
+                r += a * a;
            }
-        r = sqrt(r);
+            r = a_max * sqrt(r);
+        }
+        js_free(ctx, tab);
    }
    return JS_NewFloat64(ctx, r);
 }
@ -45234,10 +45270,10 @@ static JSValue js_promise_then_finally_func(JSContext *ctx, JSValueConst this_va
    }
    JS_FreeValue(ctx, ret);
    if (magic == 0) {
-        then_func = JS_NewCFunctionData(ctx, js_promise_finally_value_thunk, 1,
+        then_func = JS_NewCFunctionData(ctx, js_promise_finally_value_thunk, 0,
                                        0, 1, argv);
    } else {
-        then_func = JS_NewCFunctionData(ctx, js_promise_finally_thrower, 1,
+        then_func = JS_NewCFunctionData(ctx, js_promise_finally_thrower, 0,
                                        0, 1, argv);
    }
    if (JS_IsException(then_func)) {
@ -50037,7 +50073,7 @@ static JSValue js_typed_array_indexOf(JSContext *ctx, JSValueConst this_val,
                                      int argc, JSValueConst *argv, int special)
 {
    JSObject *p;
-    int len, tag, is_int, is_big, k, stop, inc, res = -1;
+    int len, tag, is_int, is_bigint, k, stop, inc, res = -1;
    int64_t v64;
    double d;
    float f;
@ -50080,7 +50116,11 @@ static JSValue js_typed_array_indexOf(JSContext *ctx, JSValueConst this_val,
        inc = 1;
    }

-    is_big = 0;
+    if (validate_typed_array(ctx, this_val))
+        goto exception;
+    p = JS_VALUE_GET_OBJ(this_val);
+
+    is_bigint = 0;
    is_int = 0; /* avoid warning */
    v64 = 0; /* avoid warning */
    tag = JS_VALUE_GET_NORM_TAG(argv[0]);
@ -50095,10 +50135,20 @@ static JSValue js_typed_array_indexOf(JSContext *ctx, JSValueConst this_val,
        is_int = (v64 == d);
    } else
 #ifdef CONFIG_BIGNUM
-    if (tag == JS_TAG_BIG_INT || tag == JS_TAG_BIG_FLOAT) {
-        /* will a generic loop for bigint and bigfloat */
-        /* XXX: should use the generic loop in math_mode? */
-        is_big = 1;
+    if (tag == JS_TAG_BIG_INT) {
+        JSBigFloat *p1 = JS_VALUE_GET_PTR(argv[0]);
+        
+        if (p->class_id == JS_CLASS_BIG_INT64_ARRAY) {
+            if (bf_get_int64(&v64, &p1->num, 0) != 0)
+                goto done;
+        } else if (p->class_id == JS_CLASS_BIG_UINT64_ARRAY) {
+            if (bf_get_uint64((uint64_t *)&v64, &p1->num) != 0)
+                goto done;
+        } else {
+            goto done;
+        }
+        d = 0;
+        is_bigint = 1;
    } else
 #endif
    {
@ -50172,7 +50222,7 @@ static JSValue js_typed_array_indexOf(JSContext *ctx, JSValueConst this_val,
        }
        break;
    case JS_CLASS_FLOAT32_ARRAY:
-        if (is_big)
+        if (is_bigint)
            break;
        if (isnan(d)) {
            const float *pv = p->u.array.u.float_ptr;
@ -50196,7 +50246,7 @@ static JSValue js_typed_array_indexOf(JSContext *ctx, JSValueConst this_val,
        }
        break;
    case JS_CLASS_FLOAT64_ARRAY:
-        if (is_big)
+        if (is_bigint)
            break;
        if (isnan(d)) {
            const double *pv = p->u.array.u.double_ptr;
@ -50221,20 +50271,22 @@ static JSValue js_typed_array_indexOf(JSContext *ctx, JSValueConst this_val,
        break;
 #ifdef CONFIG_BIGNUM
    case JS_CLASS_BIG_INT64_ARRAY:
+        if (is_bigint || (is_math_mode(ctx) && is_int &&
+                          v64 >= -MAX_SAFE_INTEGER &&
+                          v64 <= MAX_SAFE_INTEGER)) {
+            goto scan64;
+        }
+        break;
    case JS_CLASS_BIG_UINT64_ARRAY:
-        if (is_big || is_strict_mode(ctx)) {
-            /* generic loop for bignums, argv[0] is a bignum != NaN */
-            /* XXX: optimize with explicit values */
+        if (is_bigint || (is_math_mode(ctx) && is_int &&
+                          v64 >= 0 && v64 <= MAX_SAFE_INTEGER)) {
+            const uint64_t *pv;
+            uint64_t v;
+        scan64:
+            pv = p->u.array.u.uint64_ptr;
+            v = v64;
            for (; k != stop; k += inc) {
-                JSValue v = JS_GetPropertyUint32(ctx, this_val, k);
-                int ret;
-                if (JS_IsException(v))
-                    goto exception;
-                ret = js_same_value_zero(ctx, v, argv[0]);
-                JS_FreeValue(ctx, v);
-                if (ret) {
-                    if (ret < 0)
-                        goto exception;
+                if (pv[k] == v) {
                    res = k;
                    break;
                }
--- a/quickjs.h
+++ b/quickjs.h
@ -335,6 +335,8 @@ void JS_SetMemoryLimit(JSRuntime *rt, size_t limit);
 void JS_SetGCThreshold(JSRuntime *rt, size_t gc_threshold);
 JSRuntime *JS_NewRuntime2(const JSMallocFunctions *mf, void *opaque);
 void JS_FreeRuntime(JSRuntime *rt);
+void *JS_GetRuntimeOpaque(JSRuntime *rt);
+void JS_SetRuntimeOpaque(JSRuntime *rt, void *opaque);
 typedef void JS_MarkFunc(JSRuntime *rt, JSGCObjectHeader *gp);
 void JS_MarkValue(JSRuntime *rt, JSValueConst val, JS_MarkFunc *mark_func);
 void JS_RunGC(JSRuntime *rt);
@ -508,7 +510,28 @@ static js_force_inline JSValue JS_NewCatchOffset(JSContext *ctx, int32_t val)
    return JS_MKVAL(JS_TAG_CATCH_OFFSET, val);
 }

-JSValue JS_NewInt64(JSContext *ctx, int64_t v);
+static js_force_inline JSValue JS_NewInt64(JSContext *ctx, int64_t val)
+{
+    JSValue v;
+    if (val == (int32_t)val) {
+        v = JS_NewInt32(ctx, val);
+    } else {
+        v = __JS_NewFloat64(ctx, val);
+    }
+    return v;
+}
+
+static js_force_inline JSValue JS_NewUint32(JSContext *ctx, uint32_t val)
+{
+    JSValue v;
+    if (val <= 0x7fffffff) {
+        v = JS_NewInt32(ctx, val);
+    } else {
+        v = __JS_NewFloat64(ctx, val);
+    }
+    return v;
+}
+
 JSValue JS_NewBigInt64(JSContext *ctx, int64_t v);
 JSValue JS_NewBigUint64(JSContext *ctx, uint64_t v);

@ -657,7 +680,10 @@ static int inline JS_ToUint32(JSContext *ctx, uint32_t *pres, JSValueConst val)
 int JS_ToInt64(JSContext *ctx, int64_t *pres, JSValueConst val);
 int JS_ToIndex(JSContext *ctx, uint64_t *plen, JSValueConst val);
 int JS_ToFloat64(JSContext *ctx, double *pres, JSValueConst val);
+/* return an exception if 'val' is a Number */
 int JS_ToBigInt64(JSContext *ctx, int64_t *pres, JSValueConst val);
+/* same as JS_ToInt64() but allow BigInt */
+int JS_ToInt64Ext(JSContext *ctx, int64_t *pres, JSValueConst val);

 JSValue JS_NewStringLen(JSContext *ctx, const char *str1, size_t len1);
 JSValue JS_NewString(JSContext *ctx, const char *str);
--- a/release.sh
+++ b/release.sh
@ -50,21 +50,30 @@ fi

 if [ "$binary" = "yes" ] ; then

+make -j4 qjs run-test262
+make -j4 CONFIG_M32=y qjs32 run-test262-32
+strip qjs run-test262 qjs32 run-test262-32
+
 d="quickjs-linux-x86_64-${version}"
-name="quickjs-linux-x86_64-${version}"
 outdir="/tmp/${d}"

 rm -rf $outdir
 mkdir -p $outdir

-files="qjs run-test262"
+cp qjs run-test262 $outdir

-make -j4 $files
+( cd /tmp/$d && rm -f ../${d}.zip && zip -r ../${d}.zip . )

-strip $files
-cp $files $outdir
+d="quickjs-linux-i686-${version}"
+outdir="/tmp/${d}"

-( cd /tmp/$d && rm -f ../${name}.zip && zip -r ../${name}.zip . )
+rm -rf $outdir
+mkdir -p $outdir
+
+cp qjs32 $outdir/qjs
+cp run-test262-32 $outdir/run-test262
+
+( cd /tmp/$d && rm -f ../${d}.zip && zip -r ../${d}.zip . )

 fi

--- a/run-test262.c
+++ b/run-test262.c
@ -385,8 +385,11 @@ static JSValue js_print(JSContext *ctx, JSValueConst this_val,
            str = JS_ToCString(ctx, argv[i]);
            if (!str)
                return JS_EXCEPTION;
-            if (!strcmp(str, "Test262:AsyncTestComplete"))
+            if (!strcmp(str, "Test262:AsyncTestComplete")) {
                async_done++;
+            } else if (strstart(str, "Test262:AsyncTestFailure", NULL)) {
+                async_done = 2; /* force an error */
+            }
            fputs(str, outfile);
            JS_FreeCString(ctx, str);
        }
--- a/test262.conf
+++ b/test262.conf
@ -87,6 +87,7 @@ destructuring-binding
 dynamic-import
 export-star-as-namespace-from-module
 FinalizationGroup=skip
+FinalizationRegistry=skip
 Float32Array
 Float64Array
 for-in-order
--- a/test262_errors.txt
+++ b/test262_errors.txt
@ -1,17 +1,22 @@
 test262/test/language/expressions/arrow-function/eval-var-scope-syntax-err.js:47: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
+test262/test/language/expressions/async-arrow-function/eval-var-scope-syntax-err.js:49: TypeError: $DONE() not called
+test262/test/language/expressions/async-function/named-eval-var-scope-syntax-err.js:33: TypeError: $DONE() not called
+test262/test/language/expressions/async-function/nameless-eval-var-scope-syntax-err.js:33: TypeError: $DONE() not called
 test262/test/language/expressions/async-generator/eval-var-scope-syntax-err.js:28: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
 test262/test/language/expressions/async-generator/named-eval-var-scope-syntax-err.js:28: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
-test262/test/language/expressions/class/super-evaluation-order.js:26: Test262Error: via ArgumentListEvaluation Expected SameValue(«0», «123») to be true
-test262/test/language/expressions/class/super-evaluation-order.js:26: strict mode: Test262Error: via ArgumentListEvaluation Expected SameValue(«0», «123») to be true
 test262/test/language/expressions/dynamic-import/usage-from-eval.js:26: TypeError: $DONE() not called
 test262/test/language/expressions/dynamic-import/usage-from-eval.js:26: strict mode: TypeError: $DONE() not called
 test262/test/language/expressions/function/eval-var-scope-syntax-err.js:48: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
 test262/test/language/expressions/generators/eval-var-scope-syntax-err.js:49: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
 test262/test/language/expressions/object/method-definition/async-gen-meth-eval-var-scope-syntax-err.js:32: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
+test262/test/language/expressions/object/method-definition/async-meth-eval-var-scope-syntax-err.js:36: TypeError: $DONE() not called
 test262/test/language/expressions/object/method-definition/gen-meth-eval-var-scope-syntax-err.js:54: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
 test262/test/language/expressions/object/method-definition/meth-eval-var-scope-syntax-err.js:50: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
 test262/test/language/expressions/optional-chaining/optional-call-preserves-this.js:21: TypeError: value has no property
 test262/test/language/expressions/optional-chaining/optional-call-preserves-this.js:15: strict mode: TypeError: value has no property
+test262/test/language/statements/async-function/eval-var-scope-syntax-err.js:33: TypeError: $DONE() not called
 test262/test/language/statements/async-generator/eval-var-scope-syntax-err.js:28: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
+test262/test/language/statements/for-await-of/async-gen-decl-dstr-array-elem-iter-rtrn-close-null.js:81: TypeError: $DONE() not called
+test262/test/language/statements/for-await-of/async-gen-decl-dstr-array-elem-iter-rtrn-close-null.js:81: strict mode: TypeError: $DONE() not called
 test262/test/language/statements/function/eval-var-scope-syntax-err.js:49: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
 test262/test/language/statements/generators/eval-var-scope-syntax-err.js:49: Test262Error: Expected a SyntaxError to be thrown but no exception was thrown at all
--- a/tests/microbench.js
+++ b/tests/microbench.js
@ -917,11 +917,9 @@ function load_result(filename)
    var f, str, res;
    if (typeof std === "undefined")
        return null;
-    try {
    f = std.open(filename, "r");
-    } catch(e) {
+    if (!f)
        return null;
-    }
    str = f.readAsString();
    res = JSON.parse(str);
    f.close();
--- a/tests/test_builtin.js
+++ b/tests/test_builtin.js
@ -501,6 +501,10 @@ function test_regexp()
    a = eval("/\0a/");
    assert(a.toString(), "/\0a/");
    assert(a.exec("\0a")[0], "\0a");
+
+    assert(/{1a}/.toString(), "/{1a}/");
+    a = /a{1+/.exec("a{11");
+    assert(a, ["a{11"] );
 }

 function test_symbol()
--- a/tests/test_std.js
+++ b/tests/test_std.js
@ -106,6 +106,9 @@ function test_popen()
    f.puts(content);
    f.close();

+    /* test loadFile */
+    assert(std.loadFile(fname), content);
+    
    /* execute the 'cat' shell command */
    f = std.popen("cat " + fname, "r");
    str = f.readAsString();
@ -142,13 +145,19 @@ function test_os()
        buf[i] = i;
    assert(os.write(fd, buf.buffer, 0, buf.length) === buf.length);

-    assert(os.seek(fd, 0, os.SEEK_SET) === 0);
+    assert(os.seek(fd, 0, std.SEEK_SET) === 0);
    buf2 = new Uint8Array(buf.length);
    assert(os.read(fd, buf2.buffer, 0, buf2.length) === buf2.length);
    
    for(i = 0; i < buf.length; i++)
        assert(buf[i] == buf2[i]);
    
+    if (typeof BigInt !== "undefined") {
+        assert(os.seek(fd, BigInt(6), std.SEEK_SET), BigInt(6));
+        assert(os.read(fd, buf2.buffer, 0, 1) === 1);
+        assert(buf[6] == buf2[0]);
+    }
+    
    assert(os.close(fd) === 0);

    [files, err] = os.readdir(fdir);
--- a/unicode_download.sh
+++ b/unicode_download.sh
@ -1,8 +1,8 @@
 #!/bin/sh
 set -e

-url="ftp://ftp.unicode.org/Public/12.1.0/ucd"
-emoji_url="ftp://ftp.unicode.org/Public/emoji/12.0/emoji-data.txt"
+url="ftp://ftp.unicode.org/Public/13.0.0/ucd"
+emoji_url="${url}/emoji/emoji-data.txt"

 files="CaseFolding.txt DerivedNormalizationProps.txt PropList.txt \
 SpecialCasing.txt CompositionExclusions.txt ScriptExtensions.txt \
@ -11,9 +11,9 @@ PropertyValueAliases.txt"

 mkdir -p unicode

-for f in $files; do
-    g="${url}/${f}"
-    wget $g -O unicode/$f
-done
+#for f in $files; do
+#    g="${url}/${f}"
+#    wget $g -O unicode/$f
+#done
    
 wget $emoji_url -O unicode/emoji-data.txt
--- a/unicode_gen_def.h
+++ b/unicode_gen_def.h
@ -66,6 +66,7 @@ DEF(Caucasian_Albanian, "Aghb")
 DEF(Chakma, "Cakm")
 DEF(Cham, "Cham")
 DEF(Cherokee, "Cher")
+DEF(Chorasmian, "Chrs")
 DEF(Common, "Zyyy")
 DEF(Coptic, "Copt,Qaac")
 DEF(Cuneiform, "Xsux")
@ -73,6 +74,7 @@ DEF(Cypriot, "Cprt")
 DEF(Cyrillic, "Cyrl")
 DEF(Deseret, "Dsrt")
 DEF(Devanagari, "Deva")
+DEF(Dives_Akuru, "Diak")
 DEF(Dogra, "Dogr")
 DEF(Duployan, "Dupl")
 DEF(Egyptian_Hieroglyphs, "Egyp")
@ -106,6 +108,7 @@ DEF(Kayah_Li, "Kali")
 DEF(Kharoshthi, "Khar")
 DEF(Khmer, "Khmr")
 DEF(Khojki, "Khoj")
+DEF(Khitan_Small_Script, "Kits")
 DEF(Khudawadi, "Sind")
 DEF(Lao, "Laoo")
 DEF(Latin, "Latn")
@ -193,6 +196,7 @@ DEF(Ugaritic, "Ugar")
 DEF(Vai, "Vaii")
 DEF(Wancho, "Wcho")
 DEF(Warang_Citi, "Wara")
+DEF(Yezidi, "Yezi")
 DEF(Yi, "Yiii")
 DEF(Zanabazar_Square, "Zanb")
 #endif
@ -244,11 +248,11 @@ DEF(Variation_Selector, "VS")
 DEF(White_Space, "space")
 DEF(Bidi_Mirrored, "Bidi_M")
 DEF(Emoji, "")
-DEF(Emoji_Component, "")
-DEF(Emoji_Modifier, "")
-DEF(Emoji_Modifier_Base, "")
-DEF(Emoji_Presentation, "")
-DEF(Extended_Pictographic, "")
+DEF(Emoji_Component, "EComp")
+DEF(Emoji_Modifier, "EMod")
+DEF(Emoji_Modifier_Base, "EBase")
+DEF(Emoji_Presentation, "EPres")
+DEF(Extended_Pictographic, "ExtPict")
 DEF(Default_Ignorable_Code_Point, "DI")
 DEF(ID_Start, "IDS")
 DEF(Case_Ignorable, "CI")
 @ -1 +1 @@
 -01-19
 -03-16