seg fault when running this code (last node 0.2.1 and libxmljs) http://pastebin.com/F16eyypd

I tried on two machines and fails on 1500 items, other on 27891..
What can be a problem/solution?

I don't think this xmlNodeSet is needed. It's just being used to get the size of the array. But that can be done manually.

http://github.com/polotek/libxmljs/blob/master/src/xml_element.cc#L368

I tried to compile the latest code in Mac OSx and got the following error

src/xml_node.cc: In member function 'v8::Handlev8::Value libxmljs::XmlNode::to_string()':
src/xml_node.cc:222: error: 'xmlSaveToBuffer' was not declared in this scope
scons: *** [src/xml_node.os] Error 1
scons: building terminated because of errors.

Hello, I was trying to install libxmljs with the following command on Mac OS X 10.6.7, with NPM 0.3.15 and Node 0.4.2:

$ sudo npm install libxmljs

But I got the following output:

npm info it worked if it ends with ok
npm info using [email protected]
npm info using [email protected]
npm info preinstall [email protected]
make: scons: No such file or directory
make: *** [node] Error 1
npm info [email protected] Failed to exec preinstall script
npm ERR! install failed Error: [email protected] preinstall: `make node`
npm ERR! install failed `sh "-c" "make node"` failed with 2
npm ERR! install failed     at ChildProcess.<anonymous> (/usr/local/lib/node/.npm/npm/0.3.15/package/lib/utils/exec.js:49:20)
npm ERR! install failed     at ChildProcess.emit (events.js:45:17)
npm ERR! install failed     at ChildProcess.onexit (child_process.js:171:12)
npm info install failed rollback
npm info uninstall [ '[email protected]' ]
npm info preuninstall [email protected]
make: scons: No such file or directory
make: *** [clean] Error 1
npm ERR! [email protected] Error: `sh "-c" "make clean"` failed with 2
npm ERR! [email protected]     at ChildProcess.<anonymous> (/usr/local/lib/node/.npm/npm/0.3.15/package/lib/utils/exec.js:49:20)
npm ERR! [email protected]     at ChildProcess.emit (events.js:45:17)
npm ERR! [email protected]     at ChildProcess.onexit (child_process.js:171:12)
npm ERR! [email protected] failed, but continuing anyway
npm info uninstall [email protected]
npm info auto-deactive not symlink
npm info postuninstall [email protected]
npm info uninstall [email protected] complete
npm info install failed rolled back
npm ERR! Error: [email protected] preinstall: `make node`
npm ERR! `sh "-c" "make node"` failed with 2
npm ERR!     at ChildProcess.<anonymous> (/usr/local/lib/node/.npm/npm/0.3.15/package/lib/utils/exec.js:49:20)
npm ERR!     at ChildProcess.emit (events.js:45:17)
npm ERR!     at ChildProcess.onexit (child_process.js:171:12)
npm ERR! 
npm ERR! Failed at the [email protected] preinstall script.
npm ERR! This is most likely a problem with the libxmljs package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     make node
npm ERR! You can get their info via:
npm ERR!     npm owner ls libxmljs
npm ERR! There is likely additional logging output above.
npm ERR! System Darwin 10.7.0
npm ERR! argv { remain: [ 'libxmljs' ],
npm ERR! argv   cooked: [ 'install', 'libxmljs' ],
npm ERR! argv   original: [ 'install', 'libxmljs' ] }
npm not ok

As NPM said, the command make node failed on my system. (Which is kind of strange IMO... the problem is with NPM, perhaps?)

Thanks.

My include files are not in a standard location (nor are they in the location specified in node's CFLAGS). It seems like the libxmljs build process is not respecting the INCLUDE_PATH i have set in the environment.

I've got this code segfaulting after some time (1-3 seconds) since executing: http://pastebin.com/60B1iVnJ

Console log:

Spark server(27878) listening on http://*:3000 in development mode
93.158.159.73 - - [Wed, 22 Sep 2010 22:05:46 GMT] "GET /?text=123 HTTP/1.1" 200 - "" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; ru-ru) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5"
93.158.159.73 - - [Wed, 22 Sep 2010 22:05:46 GMT] "GET /favicon.ico HTTP/1.1" 404 - "http://arikon.dev.tools.yandex-team.ru:3000/?text=123" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; ru-ru) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5"
Memory tag error occurs :0xb0adcd 
 bye
xmlMemFree(B0ADF5) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0xb0adc7 
 bye
xmlMemFree(B0ADEF) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0xb0add1 
 bye
xmlMemFree(B0ADF9) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0xb0adbf 
 bye
xmlMemFree(B0ADE7) error
xmlMallocBreakpoint reached on block 0
Segmentation fault

npm info it worked if it ends with ok
npm info using [email protected]
npm info using [email protected]
npm ERR! Error building /usr/local/lib/node/.npm/libxmljs/0.4.1
npm ERR! RangeError: Maximum call stack size exceeded
npm ERR! Report this entire log at http://github.com/isaacs/npm/issues
npm ERR! or email it to [email protected]
npm ERR! Just tweeting a tiny part of the error will not be helpful.
npm not ok

I'm trying the following in node.js

http://gist.github.com/396917

what i'm seeing is the string type is always raising this exception on parser.push
Bad Argument: parseString requires a string

The line is
LIBXMLJS_ARGUMENT_TYPE_CHECK(args[0],
IsString,
"Bad Argument: parseString requires a string");

That's in XmlSaxParser::Push(const v8::Arguments& args)

The issue appears to be with LIBXMLJS_ARGUMENT_TYPE_CHECK, it always evaluates to true, even when I pass the method something like parser.push(new String("hello"));

I have a problem with using find/get methods even in simplest cases. It just returns "undefined" results. Even example test case doesn't work. I'm using FreeBSD 8.1, libxmljs 0.4.2, node 0.4.8 and libxml 2.7.8.

from spec_xml_sax_parser.js test script

it('can can be reused as a file parser', function() {
    var parser = createParser('SaxParser');

    for (var i=0; i<10; i++) {
        gc();
        parser.parseFile(filename);
    }

    assert.ok(true);
});

segfault after the first interation.

Hi,

I'm completely new to node.js and libxmljs. Tried to install it under Windows 7 using Cygwin, but it failed. Any idea what went wrong?

Versions:
node.js: 0.2.6
npm: 0.2.16
scons: 2.0.1

Dump:

$ npm install libxmljs
npm info it worked if it ends with ok
npm info using [email protected]
npm info using [email protected]
npm info preinstall [email protected]
scons: Reading SConscript files ...
OSError: [Errno 2] No such file or directory:
  File "/usr/local/lib/node/.npm/libxmljs/0.4.1/package/SConstruct", line 43:
    cflags = shellOut([xml2config, '--cflags'])
  File "/usr/local/lib/node/.npm/libxmljs/0.4.1/package/SConstruct", line 19:
    return subprocess.Popen(target, stdout=subprocess.PIPE).communicate()[0].strip()
  File "/usr/lib/python2.6/subprocess.py", line 633:
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1139:
    raise child_exception
make: *** [node] Error 2
npm info [email protected] Failed to exec preinstall script
npm ERR! install failed Error: [email protected] preinstall: `make node`
npm ERR! install failed `sh` failed with 2
npm ERR! install failed     at ChildProcess. (/usr/local/lib/node/.npm/npm/0.2.16/package/lib/utils/exec.js:25:18)
npm ERR! install failed     at ChildProcess.emit (events:34:17)
npm ERR! install failed     at ChildProcess.onexit (child_process:168:12)
npm ERR! install failed     at node.js:773:9
npm info install failed rollback
npm info uninstall [ '[email protected]' ]
npm info preuninstall [email protected]
scons: Reading SConscript files ...
OSError: [Errno 2] No such file or directory:
  File "/usr/local/lib/node/.npm/libxmljs/0.4.1/package/SConstruct", line 43:
    cflags = shellOut([xml2config, '--cflags'])
  File "/usr/local/lib/node/.npm/libxmljs/0.4.1/package/SConstruct", line 19:
    return subprocess.Popen(target, stdout=subprocess.PIPE).communicate()[0].strip()
  File "/usr/lib/python2.6/subprocess.py", line 633:
    errread, errwrite)
  File "/usr/lib/python2.6/subprocess.py", line 1139:
    raise child_exception
make: *** [clean] Error 2
npm ERR! [email protected] Error: `sh` failed with 2
npm ERR! [email protected]     at ChildProcess. (/usr/local/lib/node/.npm/npm/0.2.16/package/lib/utils/exec.js:25:18)
npm ERR! [email protected]     at ChildProcess.emit (events:34:17)
npm ERR! [email protected]     at ChildProcess.onexit (child_process:168:12)
npm ERR! [email protected]     at node.js:773:9
npm ERR! [email protected] failed, but continuing anyway
npm info uninstall [email protected]
npm info auto-deactive not symlink
npm info postuninstall [email protected]
npm info uninstall [email protected] complete
npm info install failed rolled back
npm ERR! Error: [email protected] preinstall: `make node`
npm ERR! `sh` failed with 2
npm ERR!     at ChildProcess. (/usr/local/lib/node/.npm/npm/0.2.16/package/lib/utils/exec.js:25:18)
npm ERR!     at ChildProcess.emit (events:34:17)
npm ERR!     at ChildProcess.onexit (child_process:168:12)
npm ERR!     at node.js:773:9
npm ERR!
npm ERR! Failed at the [email protected] preinstall script.
npm ERR! This is most likely a problem with the libxmljs package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     make node
npm ERR! You can get their info via:
npm ERR!     npm owner ls libxmljs

When using elem.attr(new_atttr) where new_attr is a libxmljs Attribute object, you get not only the attribute value but all of the public properties of the attribute object on the element.

<?xml version="1.0" encoding="UTF-8"?>
<foo tal:attr="fizz:'buzz'" fizz="buzz" name="function name() { [native code] }" value="function value() { [native code] }" node="function node() { [native code] }" doc="function doc() { [native code]}" parent="function parent() { [native code] }" namespace="function namespace() { [native code] }" prevSibling="function prevSibling() { [native code] }" nextSibling="function nextSibling() {[native code] }" type="function type() { [native code] }" remove="function remove() { [native code] }" toString="function toString() { [native code] }">This is a foo node.</foo>

See http://github.com/polotek/libxmljs/commit/83c0cf9cd5e21a284beffd675888f1ca09f5982d#L0R30 and http://gist.github.com/413935 -- "src/xml_element.cc:30: error: 'strdup' was not declared in this scope."

scons: Reading SConscript files ...
Checking for node.js ...(cached) yes
True
Checking for C++ library xml2... (cached) yes
Checking for node.js ...(cached) yes
TypeError: Directory /Users/eric/workspace/libxmljs/libxmljs found where file expected.:
File "/Users/eric/workspace/libxmljs/SConstruct", line 85:
LIBPATH = libpath
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Environment.py", line 260:
return apply(MethodWrapper.call, (self, target, source) + args, kw)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Environment.py", line 224:
return apply(self.method, nargs, kwargs)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Builder.py", line 632:
return self._execute(env, target, source, OverrideWarner(kw), ekw)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Builder.py", line 553:
tlist, slist = self._create_nodes(env, target, source)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Builder.py", line 500:
tlist = env.arg2nodes(target, target_factory, target=target, source=source)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Environment.py", line 484:
v = node_factory(apply(self.subst, (v,), kw))
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Node/FS.py", line 1274:
return self._lookup(name, directory, File, create)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Node/FS.py", line 1253:
return root._lookup_abs(p, fsclass, create)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Node/FS.py", line 2123:
result.diskcheck_match()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Node/FS.py", line 2269:
"Directory %s found where file expected.")
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/scons-1.3.0/SCons/Node/FS.py", line 410:
raise TypeError, errorfmt % node.abspath

MacOS Snow Leopard

npm install fails on Ubuntu 10.04 LTS after upgrading node and npm to latest versions.

As I'm a linux newb I imagine it's my fault rather than yours. But npm asked me nicely to post this here so...

> [email protected] preinstall /home/edwin/node/node_modules/libxmljs
> make node

scons: Reading SConscript files ...
Checking for node.js ...(cached) yes
True
Checking for C++ library xml2... yes
Checking for node.js ...(cached) yes
scons: done reading SConscript files.
scons: Building targets ...
g++ -o src/html_document.os -c -I/usr/include/libxml2 -g -O2 -rdynamic -D_GNU_SOURCE -DHAVE_CONFIG_H=1 -pthread -m32 -g -O3 -DHAVE_OPENSSL=1 -DEV_FORK_ENABLE=0 -DEV_EMBED_ENABLE=0 -DEV_MULTIPLICITY=0 -DX_STACKSIZE=65536 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DEV_MULTIPLICITY=0 -DHAVE_FDATASYNC=1 -DPLATFORM="linux" -D__POSIX__=1 -Wno-unused-parameter -D_FORTIFY_SOURCE=2 -I/usr/include/node -fPIC src/html_document.cc
In file included from src/html_document.h:5,
                 from src/html_document.cc:2:
src/libxmljs.h:5:16: error: v8.h: No such file or directory
src/libxmljs.h:6:18: error: node.h: No such file or directory
In file included from src/libxmljs.h:98,
                 from src/html_document.h:5,
                 from src/html_document.cc:2:
src/object_wrap.h:9: error: 'node' has not been declared
src/object_wrap.h:9: error: expected '{' before 'ObjectWrap'
src/object_wrap.h:9: error: invalid type in declaration before '{' token
src/object_wrap.h:9: warning: extended initializer lists only available with -std=c++0x or -std=gnu++0x
src/object_wrap.h:10: error: expected primary-expression before 'public'
src/object_wrap.h:10: error: expected '}' before 'public'
src/object_wrap.h:10: error: expected ',' or ';' before 'public'
src/html_document.cc:9: error: expected '}' at end of input
scons: *** [src/html_document.os] Error 1
scons: building terminated because of errors.
make: *** [node] Error 2
npm ERR! error installing [email protected] Error: [email protected] preinstall: `make node`
npm ERR! error installing [email protected] `sh "-c" "make node"` failed with 2
npm ERR! error installing [email protected]     at ChildProcess.<anonymous> (/usr/lib/node_modules/npm/lib/utils/exec.js:49:20)
npm ERR! error installing [email protected]     at ChildProcess.emit (events.js:67:17)
npm ERR! error installing [email protected]     at ChildProcess.onexit (child_process.js:192:12)

> [email protected] preuninstall /home/edwin/node/node_modules/libxmljs
> make clean

scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Cleaning targets ...
scons: done cleaning targets.
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Cleaning targets ...
scons: done cleaning targets.
npm ERR! [email protected] preinstall: `make node`
npm ERR! `sh "-c" "make node"` failed with 2
npm ERR!
npm ERR! Failed at the [email protected] preinstall script.
npm ERR! This is most likely a problem with the libxmljs package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     make node
npm ERR! You can get their info via:
npm ERR!     npm owner ls libxmljs
npm ERR! There is likely additional logging output above.
npm ERR!
npm ERR! System Linux 2.6.32-32-generic
npm ERR! command "node" "/usr/bin/npm" "install" "libxmljs"
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR!     /home/edwin/node/npm-debug.log
npm not ok

I tried installing libxmljs via npm an ran into an error:

mobius:libxmljs dave$ npm install libxmljs
npm info it worked if it ends with ok
npm info using [email protected]
npm info using [email protected]
npm info preinstall [email protected]
make: scons: Command not found
make: *** [node] Error 127
npm info [email protected] Failed to exec preinstall script
npm ERR! install failed Error: [email protected] preinstall: make node
npm ERR! install failed sh failed with 2
npm ERR! install failed at ChildProcess. (/usr/local/lib/node/.npm/npm/0.2.10-1/package/lib/utils/exec.js:24:18)
npm ERR! install failed at ChildProcess.emit (events.js:34:17)
npm ERR! install failed at ChildProcess.onexit (child_process.js:164:12)
npm info install failed rollback
npm info uninstall [ '[email protected]' ]
npm info preuninstall [email protected]
make: scons: Command not found
make: *** [clean] Error 127
npm ERR! [email protected] Error: sh failed with 2
npm ERR! [email protected] at ChildProcess. (/usr/local/lib/node/.npm/npm/0.2.10-1/package/lib/utils/exec.js:24:18)
npm ERR! [email protected] at ChildProcess.emit (events.js:34:17)
npm ERR! [email protected] at ChildProcess.onexit (child_process.js:164:12)
npm ERR! [email protected] failed, but continuing anyway
npm ERR! rollback failed Error: sh failed with 2
npm ERR! rollback failed at ChildProcess. (/usr/local/lib/node/.npm/npm/0.2.10-1/package/lib/utils/exec.js:24:18)
npm ERR! rollback failed at ChildProcess.emit (events.js:34:17)
npm ERR! rollback failed at ChildProcess.onexit (child_process.js:164:12)
npm ERR! Error: [email protected] preinstall: make node
npm ERR! sh failed with 2
npm ERR! at ChildProcess. (/usr/local/lib/node/.npm/npm/0.2.10-1/package/lib/utils/exec.js:24:18)
npm ERR! at ChildProcess.emit (events.js:34:17)
npm ERR! at ChildProcess.onexit (child_process.js:164:12)
npm ERR!
npm ERR! Failed at the [email protected] preinstall script.
npm ERR! This is most likely a problem with the libxmljs package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! make node
npm ERR! You can get their info via:
npm ERR! npm owner ls libxmljs
npm ERR! There may be additional logging output above.
npm not ok
mobius:libxmljs dave$

Any ideas on what's going on here? I think it's an issue with "scons".

Thanks,
Dave

How about using V8 memory allocator for libxml?
I've seen that you are using xmlMemSetup in InitializeLibXMLJS, but it sets default functions for libxml.
Maybe should try to change these defaults to allocation methods from v8?
That is, it turns out that all memory will be allocated using v8.
If this can be done, you can then remove the code for memory management of libxmljs such as UpdateV8Memory, V8::AdjustAmountOfExternalAllocatedMemory and others.

This leaks:

var libxml = require('libxmljs');

while (true) {
  new libxml.Document(function(n) {
    n.node('element', {'attr': 'test'}, 'value');
  });
}

But this one doesn't:

var libxml = require('libxmljs');

while (true) {
  new libxml.Document(function(n) {
    n.node('element', 'value');
  });
}

So I guess there is something wrong around arguments.

Tested on e52b22b, libxml2 2.6.32.dfsg-5+lenny1, nodejs v0.1.103.

In a Joyent no.de account, do the following:

pkgin install libxml2; pkgin cl; pkgin -y in scons
npm install libxmljs

This will fail. So I grabbed the files and went directly to run make with:

npm cache add [email protected]
cd ~/.node_libraries/.npm/.cache/libxmljs/0.4.1/package
make

This results in:

scons: Reading SConscript files ...
Checking for node.js ...(cached) yes
True
Checking for C++ library xml2... no
Did not find libxml2, exiting!
make: *** [node] Error 1

It turns out that the joyent environment puts the libraries at /lib, so I tried adding '/lib' to the libpath in SConstruct, but that didn't help. I'm guessing there is some other path, perhaps for the include files, that needs to be tweaked too.

See issue #23

There are problems parsing XML documents in encoding, other than utf-8, for example in windows-1251.
Comparing with python binding: parser opens document, recognizes encoding and returns all strings from document as unicode objects, properly converted from document encoding. When I need to modify document, I set new strings as unicode objects also, and during serialization to XML string they converted to the right encoding with respect to encoding property of the document.
This (or something similar) doesn't happen when working with such documents from node.js.

xml parsing can be time-intensive for large documents; is it possible to offer a callback on parseXmlFile and parseXmlString? This would help me out using the library with node.js.

It seems document nodes with integers (and probably all non-strings) as content ignore the integers. The following code:

var libxml = require("libxmljs");
var sys = require("sys");

var doc = {
  id: "1",
  fizzbuzz_t: "foo",
  wakak_i: 5
};

var xmldoc = new libxml.Document(function (n) {
  n.node("doc", function (n) {
    for (field in doc) {
      n.node("field", {name: field}, doc[field]);
    }
  });
});

var xmldoc2 = new libxml.Document(function (n) {
  n.node("doc", function (n) {
    for (field in doc) {
      n.node("field", {name: field}, String(doc[field]));
    }
  });
});

sys.puts(xmldoc.toString());
sys.puts(xmldoc2.toString());

Gives the following result:

$ node libxml-int.js 
<?xml version="1.0" encoding="UTF-8"?>
<doc><field name="id">1</field><field name="fizzbuzz_t">foo</field><field name="wakak_i"/></doc>

<?xml version="1.0" encoding="UTF-8"?>
<doc><field name="id">1</field><field name="fizzbuzz_t">foo</field><field     name="wakak_i">5</field></doc>

$ 

Notice that the first document silently drops the content for "wakak_i". Should I wrap all content in String() or should libxmljs handle integers there?

Hi compiling on Mac 10.6.x with mac ports installed libxml2.

Here is the error I get when running scons. I have nodejs node-v0.1.94 installed.

  libxmljs> scons
  scons: Reading SConscript files ...
  /usr/local/lib/scons-1.0.1/SCons/Platform/posix.py:38: DeprecationWarning: The popen2 module    is deprecated.  Use the subprocess module.
    import popen2
   /usr/local/lib/scons-1.0.1/SCons/Tool/msvs.py:37: DeprecationWarning: the md5 module is    deprecated; use hashlib instead
    import md5
  Checking for node.js ...(cached) yes
   True
  Checking for C++ library xml2... no
  Did not find libxml2, exiting!

And here is where libxml2 is installed from macports:

ls -lh /opt/local/lib/libxml2*
-rwxr-xr-x 2 root admin 1.2M 2009-02-07 14:48 /opt/local/lib/libxml2.2.7.3.dylib*
 lrwxr-xr-x 1 root admin   19 2009-02-07 14:48 /opt/local/lib/libxml2.2.dylib -> libxml2.2.7.3.dylib*
-rw-r--r-- 2 root admin 1.6M 2009-02-07 14:48 /opt/local/lib/libxml2.a
lrwxr-xr-x 1 root admin   19 2009-02-07 14:48 /opt/local/lib/libxml2.dylib -> libxml2.2.7.3.dylib*
-rwxr-xr-x 2 root admin  866 2009-02-07 14:48 /opt/local/lib/libxml2.la*


 ls -lh /opt/local/include/libxml2/
 total 0
 drwxr-xr-x 49 root admin 1.7K 2009-02-07 14:48 libxml/

Here's the code I'm testing with and the associated output: http://gist.github.com/407236
If you want to take a look at the original XML document, look here: http://stackoverflow.com/feeds/tag/node.js

You can see the newlines in the output and it's adding the text content multiple times (due to multiple 'text' children).

I'm on Mac OS X 10.6.3 (an iMac),

I just compile libxmljs with fresh node.js, libxml2 and scons:

• node v0.1.98-31-g1c6671a (from github)
• scons @1.3.0 (from macport)
• libxml2 @2.7.7 (from macport)

My javascript file is fairly simple, only one line:

  var libxml = require('./libxmljs');

But, when I run this file with node, I got the following error right away:

Memory tag error occurs :0x100701788 
     bye
xmlMemFree(1007017B0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701798 
     bye
xmlMemFree(1007017C0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701418 
     bye
xmlMemFree(100701440) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701758 
     bye
xmlMemFree(100701780) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701408 
     bye
xmlMemFree(100701430) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701728 
     bye
xmlMemFree(100701750) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x1007013f8 
     bye
xmlMemFree(100701420) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x1007016f8 
     bye
xmlMemFree(100701720) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x1007013b8 
     bye
xmlMemFree(1007013E0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x1007013c8 
     bye
xmlMemFree(1007013F0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100700de8 
     bye
xmlMemFree(100700E10) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701388 
     bye
xmlMemFree(1007013B0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100700dd8 
     bye
xmlMemFree(100700E00) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701358 
     bye
xmlMemFree(100701380) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100700a88 
     bye
xmlMemFree(100700AB0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701328 
     bye
xmlMemFree(100701350) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x100701198 
     bye
xmlMemFree(1007011C0) error
xmlMallocBreakpoint reached on block 0

Any clue what could cause this error ?

By the way, I try with another machine (my MacBook) and I got exactly the same error.

Thanks.

I'm trying to get libxmljs to parse NewsML to (among other things) extract the html article content. But, when I try and do a doc.get to grab the html node, libxmljs returns nothing. doc.get works perfectly fine for other things, in fact I can get the parent of the html node successfully. Is this a libxmljs or a libxml problem?

Here's a simplified version of what I'm trying to do (I've significantly stripped down the XML):

var libxmljs = require('libxmljs');

var xml = '<?xml version="1.0" encoding="ISO-8859-1"?>' +
            '<!DOCTYPE NewsML SYSTEM "../DTD/NewsMLv1.0.dtd" [<!ENTITY % html SYSTEM "../DTD/xhtml1-strict.dtd">]>' +
            '<NewsML>' +
            '   <NewsItem>' +
            '       <NewsComponent Duid="wrapper" Essential="no" EquivalentsList="no">' +
            '           <NewsComponent Duid="text" Essential="no" EquivalentsList="no">' +
            '               <ContentItem>' +
            '                   <DataContent>' +
            '                       <html xmlns="http://www.w3.org/1999/xhtml">' +
            '                           <head>' +
            '                               <title/>' +
            '                           </head>' +
            '                           <body>' +
            '                               <p>This is some text.</p>' +
            '                           </body>' +
            '                       </html>' +
            '                   </DataContent>' +
            '               </ContentItem>' +
            '           </NewsComponent>' +
            '       </NewsComponent>' +
            '   </NewsItem>' +
            '</NewsML>';

var doc = libxmljs.parseXmlString(xml);
var dataContentNode = doc.get('//DataContent');
var htmlNode = doc.get('//html');

console.log(dataContentNode.toString()); // correctly returns the dataContent node and all children
console.log(htmlNode.toString()); // fails because htmlNode is undefined

$ node --version
v0.4.7
$ npm --version
1.0.6
$ uname -a
Darwin tippy.local 10.7.0 Darwin Kernel Version 10.7.0: Sat Jan 29 15:17:16 PST 2011; root:xnu-1504.9.37~1/RELEASE_I386 i386
$ g++ --version
i686-apple-darwin10-g++-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3)
Copyright (C) 2007 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ npm install libxmljs

[email protected] preinstall /Users/davidherron/Node.JS/node_modules/libxmljs
make node

scons: Reading SConscript files ...
Checking for node.js ...(cached) yes
True
Checking for C++ library xml2... yes
Checking for node.js ...(cached) yes
scons: done reading SConscript files.
scons: Building targets ...
g++ -o src/html_document.os -c -I/opt/local/include/libxml2 -rdynamic -D_GNU_SOURCE -DHAVE_CONFIG_H=1 -pthread -arch x86_64 -g -O3 -DHAVE_OPENSSL=1 -DEV_FORK_ENABLE=0 -DEV_EMBED_ENABLE=0 -DEV_MULTIPLICITY=0 -DX_STACKSIZE=65536 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DEV_MULTIPLICITY=0 -DHAVE_FDATASYNC=0 -DPLATFORM="darwin" -D__POSIX__=1 -Wno-unused-parameter -D_FORTIFY_SOURCE=2 -DNDEBUG -I/Users/david/node.js/0.4.7/include/node -fPIC src/html_document.cc
In file included from src/html_document.h:5,
from src/html_document.cc:2:
src/libxmljs.h:5:16: error: v8.h: No such file or directory
src/libxmljs.h:6:18: error: node.h: No such file or directory
In file included from src/libxmljs.h:98,
from src/html_document.h:5,
from src/html_document.cc:2:
src/object_wrap.h:9: error: 'node' has not been declared
src/object_wrap.h:9: error: expected {' before 'ObjectWrap' src/object_wrap.h:9: error: function definition does not declare parameters In file included from src/html_document.h:6, from src/html_document.cc:2: src/xml_document.h:9: error: invalid use of incomplete type 'class libxmljs::LibXmlObj' src/object_wrap.h:9: error: forward declaration of 'class libxmljs::LibXmlObj' src/xml_document.h:15: error: 'v8' has not been declared src/xml_document.h:15: error: ISO C++ forbids declaration of 'Persistent' with no type src/xml_document.h:15: error: expected ';' before '<' token src/xml_document.h:17: error: 'v8' has not been declared src/xml_document.h:17: error: expected ',' or '...' before '<' token src/xml_document.h:18: error: 'v8' has not been declared src/xml_document.h:18: error: ISO C++ forbids declaration of 'Persistent' with no type src/xml_document.h:18: error: expected ';' before '<' token src/xml_document.h:22: error: 'v8' has not been declared src/xml_document.h:22: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:22: error: expected ';' before '<' token src/xml_document.h:23: error: 'v8' has not been declared src/xml_document.h:23: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:23: error: expected ';' before '<' token src/xml_document.h:24: error: 'v8' has not been declared src/xml_document.h:24: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:24: error: expected ';' before '<' token src/xml_document.h:25: error: 'v8' has not been declared src/xml_document.h:25: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:25: error: expected ';' before '<' token src/xml_document.h:26: error: 'v8' has not been declared src/xml_document.h:26: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:26: error: expected ';' before '<' token src/xml_document.h:27: error: 'v8' has not been declared src/xml_document.h:27: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:27: error: expected ';' before '<' token src/xml_document.h:28: error: 'v8' has not been declared src/xml_document.h:28: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:28: error: expected ';' before '<' token src/xml_document.h:32: error: 'v8' has not been declared src/xml_document.h:32: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:32: error: expected ';' before '<' token src/xml_document.h:33: error: 'v8' has not been declared src/xml_document.h:33: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:33: error: expected ';' before '<' token src/xml_document.h:34: error: 'v8' has not been declared src/xml_document.h:34: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:34: error: expected ';' before '<' token src/xml_document.h:35: error: 'v8' has not been declared src/xml_document.h:35: error: ISO C++ forbids declaration of 'Handle' with no type src/xml_document.h:35: error: expected ';' before '<' token In file included from src/html_document.cc:2: src/html_document.h:14: error: 'v8' has not been declared src/html_document.h:14: error: expected ',' or '...' before '<' token src/html_document.cc:7: error: variable or field 'Initialize' declared void src/html_document.cc:7: error: 'v8' has not been declared src/html_document.cc:7: error: 'v8' has not been declared src/html_document.cc:7: error: 'target' was not declared in this scope scons: *** [src/html_document.os] Error 1 scons: building terminated because of errors. make: *** [node] Error 2 npm ERR! error installing [email protected] Error: [email protected] preinstall:make node npm ERR! error installing [email protected]sh "-c" "make node"` failed with 2
npm ERR! error installing [email protected] at ChildProcess. (/Users/davidherron/Node.JS/0.4.7/lib/node_modules/npm/lib/utils/exec.js:49:20)
npm ERR! error installing [email protected] at ChildProcess.emit (events.js:67:17)
npm ERR! error installing [email protected] at ChildProcess.onexit (child_process.js:192:12)

[email protected] preuninstall /Users/davidherron/Node.JS/node_modules/libxmljs
make clean

scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Cleaning targets ...
scons: done cleaning targets.
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Cleaning targets ...
scons: done cleaning targets.
npm ERR! [email protected] preinstall: make node
npm ERR! sh "-c" "make node" failed with 2
npm ERR!
npm ERR! Failed at the [email protected] preinstall script.
npm ERR! This is most likely a problem with the libxmljs package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! make node
npm ERR! You can get their info via:
npm ERR! npm owner ls libxmljs
npm ERR! There is likely additional logging output above.
npm ERR!
npm ERR! System Darwin 10.7.0
npm ERR! command "node" "/Users/davidherron/Node.JS/0.4.7/bin/npm" "install" "libxmljs"
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /Users/davidherron/Node.JS/affiliates/linkshare/npm-debug.log
npm not ok

other options:
http://github.com/280north/narwhal/blob/master/lib/util.js#L159
http://github.com/rsms/oui/blob/master/oui/std-additions.js#L9

Example xml:

<soap:Envelope
xmlns:soap="http://www.w3.org/2001/12/soap-envelope"
soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding">/soap:Envelope

So if I parse this using libxml.parseXmlString and then try to find the envelope node using a namespace doc.find("soap:Envelope");

I get the following error.

XPath error : Undefined namespace prefix
xmlXPathEval: evaluation failed

If I build the xml doc using doc.node etc I can successfully select nodes with xpath that have namespaces.

Unfortunately I need to parse a string :(

new libxml.Element(doc, name, content) does not work as per docs:

// (doc, name, content) = content is dropped
var newnode = new libxml.Element(document, 'em', 'wink!');
sys.puts(newnode);

<em/>

// (doc, name, attr, content) = correct
var newnode = new libxml.Element(document, 'em', {}, 'wink!');
sys.puts(newnode);

<em>wink!</em>

thx!

Here's the code I'm testing with and the associated output: http://gist.github.com/407236
If you want to take a look at the original XML document, look here: http://stackoverflow.com/feeds/tag/node.js

It seems a 'text' child is automatically added to every element whose text() returns the text of the parent node. For example: foo.text() == "" but foo.child(0).text() == "text of the foo element"

Attempting to install libxmljs on a system without scons present fails with:
make: scons: No such file or directory
make: *** [node] Error 1
However, after installing scons and attempting to rebuild, npm seems to think that libxmljs was successfully installed. Attempting to uninstall via npm results in:
npm fail Couldn't remove version 0.4.0
npm ! Error: ENOENT, No such file or directory
at node.js:221:9
The workaround seems to be deleting ~/.node_libraries/.npm/libxmljs, after which it can be sucessfully rebuilt.

Right now they both return the sibling node that was added. That's lame.

Segmentation fault at line 57 of xml_sax_parser.cc:
context_->_private = 0;

XmlSaxParser::releaseContext is called from the destructor but if initializeContext was not previously executed the result is EXC_BAD_ACCESS.

This happens when a new parser is created but never used and the garbage collector kicks in.

I have built libxmljs for use with node.

If I require("./libxmljs") I get errors and my node app closes (I have included the errors at the bottom of this issue)

(I use libxml2-2.7.2 and node 0.1.100 )

Memory tag error occurs :0x964e6e0
bye
xmlMemFree(964E6F8) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e6f0
bye
xmlMemFree(964E708) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e6b8
bye
xmlMemFree(964E6D0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e6c8
bye
xmlMemFree(964E6E0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e690
bye
xmlMemFree(964E6A8) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e6a0
bye
xmlMemFree(964E6B8) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e668
bye
xmlMemFree(964E680) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e678
bye
xmlMemFree(964E690) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e640
bye
xmlMemFree(964E658) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e650
bye
xmlMemFree(964E668) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e618
bye
xmlMemFree(964E630) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e628
bye
xmlMemFree(964E640) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x962d3d8
bye
xmlMemFree(962D3F0) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e600
bye
xmlMemFree(964E618) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x962cff8
bye
xmlMemFree(962D010) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e5e8
bye
xmlMemFree(964E600) error
xmlMallocBreakpoint reached on block 0
Memory tag error occurs :0x964e518
bye
xmlMemFree(964E530) error

I'm getting a segmentation fault when using the XML builder functions. This apparently happens after the garbage collector runs (I can see the memory tag errors right before the crash). Here's what it says:

*** glibc detected *** node: corrupted double-linked list: 0x0a29d0f8 ***
======= Backtrace: =========
/lib/tls/i686/cmov/libc.so.6(+0x6b591)[0xb74b5591]
/lib/tls/i686/cmov/libc.so.6(+0x6b9ea)[0xb74b59ea]
/lib/tls/i686/cmov/libc.so.6(+0x6cd65)[0xb74b6d65]
/lib/tls/i686/cmov/libc.so.6(cfree+0x6d)[0xb74b9ecd]
/usr/lib/libxml2.so.2(xmlMemFree+0xe1)[0xb488cd71]
/usr/local/lib/node/.npm/libxmljs/0.4.1/package/libxmljs.node(_ZN8libxmljs11XmlDocument9to_stringEv+0x8e)[0xb4a517ce]
/usr/local/lib/node/.npm/libxmljs/0.4.1/package/libxmljs.node(_ZN8libxmljs11XmlDocument8ToStringERKN2v89ArgumentsE+0x5c)[0xb4a51a1c]

I don't know if the memory map is of any help, but I can post that too if so. This is under Ubuntu 10.04.

http://groups.google.com/group/nodejs/browse_thread/thread/93bb6942731cadc5#

A note should be added to the readme that libxml2 development packages are required for building

Running the code below on NodeJS 0.3.6 causes this error.

Error: Must supply parseXmlFile with a filename

xml.js

var libxmljs = require('libxmljs');
var xml = libxmljs.parseXmlFile('odds.xml');

I can consistently cause a segmentation fault (in gdb) with a name tag. I run the server, load (using refresh) a page and it loads OK. I then reload the page and the seg fault occurs. (It consistently happens on the second page load).

The backtrace is at the bottom of this post.

The bit of code it occurs in is here:

            sys.puts('CeXmlNode: tagName')
    var n = this.libXmlNode 
            sys.puts('CeXmlNode: tagName: 2: ' + sys.inspect(n))
            for (var i in n) {
                  sys.puts(n[i])
            }
            sys.puts('** CeXmlNode: tagName: going to try to get the name now!!: ')
    var name = n.name()
            sys.puts('CeXmlNode: tagName: 3: ' + name)
    //return this.libXmlNode.name()
    return name

and the output looks like this: You can see that the element (n) seems to exist OK because I can iterate over its contents fine.

CeXmlNode: tagName
CeXmlNode: tagName: 2: {}
function addChild() { [native code] }
function () {
var args = libxml.Element.Arguments(arguments);
var elem = null;

if (args[0] instanceof libxml.Element)
elem = args[0];
else
elem = new libxml.Element(this.doc(), args[0], args[1], args[2], args[3]);

this.addChild(elem);
return elem;
}
function attr() { [native code] }
function () {
return this.find.apply(this, arguments)[0];
}
function () {
var args = arguments.length == 1 ? [null, arguments[0]] : [arguments[0], arguments[1]];
return new libxml.Namespace(this, args[0], args[1]);
}
function attrs() { [native code] }
function child() { [native code] }
function childNodes() { [native code] }
function find() { [native code] }
function nextElement() { [native code] }
function prevElement() { [native code] }
function name() { [native code] }
function path() { [native code] }
function text() { [native code] }
function addPrevSibling() { [native code] }
function addNextSibling() { [native code] }
function doc() { [native code] }
function parent() { [native code] }
function namespace() { [native code] }
function prevSibling() { [native code] }
function nextSibling() { [native code] }
function type() { [native code] }
function remove() { [native code] }
function toString() { [native code] }
CeXmlNode: tagName: 3: ceImport
CeXmlNode.getAttribute: 1
CeXmlNode.getAttribute: 4: 'selects/ProjectObjects.xml'
CeXmlNode.getAttribute: 1
CeXmlNode.getAttribute: 4: 'false'
CeXmlNode: tagName
CeXmlNode: tagName: 2: {}
function addChild() { [native code] }
function () {
var args = libxml.Element.Arguments(arguments);
var elem = null;

if (args[0] instanceof libxml.Element)
elem = args[0];
else
elem = new libxml.Element(this.doc(), args[0], args[1], args[2], args[3]);

this.addChild(elem);
return elem;
}
function attr() { [native code] }
function () {
return this.find.apply(this, arguments)[0];
}
function () {
var args = arguments.length == 1 ? [null, arguments[0]] : [arguments[0], arguments[1]];
return new libxml.Namespace(this, args[0], args[1]);
}
function attrs() { [native code] }
function child() { [native code] }
function childNodes() { [native code] }
function find() { [native code] }
function nextElement() { [native code] }
function prevElement() { [native code] }
function name() { [native code] }
function path() { [native code] }
function text() { [native code] }
function addPrevSibling() { [native code] }
function addNextSibling() { [native code] }
function doc() { [native code] }
function parent() { [native code] }
function namespace() { [native code] }
function prevSibling() { [native code] }
function nextSibling() { [native code] }
function type() { [native code] }
function remove() { [native code] }
function toString() { [native code] }
** CeXmlNode: tagName: going to try to get the name now!!:

Program received signal SIGSEGV, Segmentation fault.

== backtrace ==

Program received signal SIGSEGV, Segmentation fault.
0x0049a785 in ?? () from /lib/tls/i686/cmov/libc.so.6
(gdb) backtrace
#0 0x0049a785 in ?? () from /lib/tls/i686/cmov/libc.so.6
#1 0x081da73e in v8::internal::StrLength (string=0x8 <Address 0x8 out of bounds>)

at /home/ed/node/node-v0.1.97/deps/v8/src/utils.h:142

at /home/ed/node/node-v0.1.97/deps/v8/src/api.cc:3392

at /home/ed/node/node-v0.1.97/deps/v8/src/builtins.cc:1054

has_pending_exception=0xbfffe3af) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:94

pending_exception=0xbfffe3af) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:121

getter=0xb5fd9c45) at /home/ed/node/node-v0.1.97/deps/v8/src/objects.cc:209

structure=0xb5d833e1, name=0xb5fbadbd, holder=0xb5d8a479)
at /home/ed/node/node-v0.1.97/deps/v8/src/objects.cc:185

name=0xb5fbadbd, attributes=0xbfffe504) at /home/ed/node/node-v0.1.97/deps/v8/src/objects.cc:501

name=...) at /home/ed/node/node-v0.1.97/deps/v8/src/ic.cc:700

has_pending_exception=0xbfffeadf) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:94

pending_exception=0xbfffeadf) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:121

at /home/ed/node/node-v0.1.97/deps/v8/src/api.cc:2669

data=0x86a7659 "POST /ceInfoSource.aspx?request=ceform&fid=nodeling_home_01&payload=&args=projectId:4&formId=&__=Thu%20Jun%2010%202010%2010%3A24%3A10%20GMT%2B0100%20(GMT%20Daylight%20Time) HTTP/1.1\r\nHost: u10\r\nUser-A"..., len=740) at ../deps/http_parser/http_parser.c:1366

has_pending_exception=0xbfffef3f) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:94

pending_exception=0xbfffef3f) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:121

at /home/ed/node/node-v0.1.97/deps/v8/src/api.cc:2669

has_pending_exception=0xbffff35f) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:94

pending_exception=0xbffff35f) at /home/ed/node/node-v0.1.97/deps/v8/src/execution.cc:121

at /home/ed/node/node-v0.1.97/deps/v8/src/api.cc:2669

It's not valid XML but the error thrown doesn't help pin point the error at all. Looks as if the error type coming from the library is unexpected.

var doc = xmljs.parseXmlString("\n");

results in:

node: src/xml_syntax_error.cc:102: static v8::Handle<v8::Value> libxmljs::XmlSyntaxError::Getter(v8::Local<v8::String>, const v8::AccessorInfo&): Assertion `0 && "This shouldnt happen"' failed.

I cannot figure out why I receive an array containing undefined values mixed in with the matched elements when doing a .find():

var libxmljs = require("libxmljs"),

  myxml = '<?xml version="1.0" encoding="UTF-8"?>'+
  '<ajax-response><response type="object" id="unknown">'+
  '<generic response="Success" message="Accepted" /></r'+
  'esponse></ajax-response>',

  xml = libxmljs.parseXmlString(myxml),
  res = xml.find('//generic');

console.log('Length: '+res.length);

for(var i=0; i<res.length; i++) {
  console.log('['+i+']'+(
    (typeof(res[i])=='undefined')?
      'Undefined value':
      res[i].toString()
  ));
}

• Note there is no whitespace in the XML
• It seems like the length should be 1 with the given XML and query
• It seems like the returned array should contain "elements" or nothing
• Multiple matches create additional undefined elements
• Replicable on the most recent version tagged on github

Am I missing something? I tried to check if anyone else had this problem, and I read through all the documentation that I could find, and nothing mentions why this would be happening.

In the SaxPushParser wiki page, the example when using this syntax-ok xml file, the onEndDocument event is not fired.

Isn't it supposed to fire when the xml parsing is over?

Not sure why this is, because many other entities are handled properly.

When querying some wsdl with libxmljs, I run 2 xpath querys successfully:

doc.find('//xs:schema',{'xs':'http://www.w3.org/2001/XMLSchema'});

schema.find('xs:element',{'xs':'http://www.w3.org/2001/XMLSchema'});

but node.js is segfualting on the following query (the node is an xs:element.

type.find('xs:complexType/xs:sequence/xs:element',{'xs':'http://www.w3.org/2001/XMLSchema'});

This error doesn't always occur on the same element. This is the error I get when running under gdb.

Program received signal SIGSEGV, Segmentation fault.

0x00613758 in libxmljs::XmlXpathContext::evaluate (this=0xbfffcdfc, 
    xpath=0x8492690 "xs:complexType/xs:sequence/xs:element") at src/xml_xpath_context.cc:36
36    v8::Handle nodes = v8::Array::New(result->nodesetval->nodeNr);