New subject: [lxml-dev] segfaults under python2.3 compiled with gcc 2.95.2

17 Nov 2006

      Hi,
-- long-post-warning --

I run into segfaults using a python2.3, gcc 2.95.2 - build (yes I know,
mighty old compiler :-):
Lib versions:
lxml 1.1.2
libxml2-2.6.23
libxslt-1.1.15

Tests work fine with everything gcc3.4.4-built, using python2.4 (same lib
versions), see below.

Both segfaults seem to arise when an error is raised internally (though it
is
unclear why the first is an error - it does not raise an exception when run
under python2.4/gcc3.4.4).

1. Using unprefixed namespace:

python2.3
Python 2.3.4 (#6, Jul 20 2004, 11:09:38)
[GCC 2.95.2 19991024 (release)] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
...
...
...
from lxml import etree
elt = etree.fromstring("""<RvXML xmlns="myURI"></RvXML>""")
Segmentation Fault (core dumped)
backtrace:

gdb /apps/prod/bin/python2.3
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "sparc-sun-solaris2.6"...
(gdb) r -i -c 'from lxml import etree; elt = etree.fromstring("""<RvXML
xmlns="myURI"></RvXML>""")'
Starting program: /apps/prod/bin/python2.3 -i -c 'from lxml import etree;
elt = etree.fromstring("""<RvXML xmlns="myURI"></RvXML>""")'
[New LWP    2        ]
[New LWP    3        ]
[New LWP    4        ]
[New LWP    5        ]

Program received signal SIGSEGV, Segmentation fault.
0xff07b760 in pthread_mutex_lock () from /usr/lib/libthread.so.1
(gdb) bt
#0  0xff07b760 in pthread_mutex_lock () from /usr/lib/libthread.so.1
#1  0xaa760 in PyThread_release_lock (lock=0x0) at
Python/thread_pthread.h:532
#2  0x840c0 in PyEval_ReleaseThread (tstate=0x11abc0) at Python/ceval.c:339
#3  0xa4338 in PyGILState_Release (oldstate=PyGILState_UNLOCKED) at
Python/pystate.c:473
#4  0xfe68ceb4 in __pyx_f_5etree__receiveError
(__pyx_v_c_log_handler=0x2146c0, __pyx_v_error=0x206700)
    at src/lxml/etree.c:15789
#5  0xfe4324b4 in __xmlRaiseError (schannel=0xfe68ce68
<__pyx_f_5etree__receiveError>,
    channel=0xfe432880 <xmlParserWarning>, data=0x2146c0, ctx=0x206580,
nod=0x0, domain=1, code=100,
    level=XML_ERR_WARNING, file=0x0, line=1, str1=0x25f01b "myURI",
str2=0x0, str3=0x0, int1=0, col=13,
    msg=0xfe518560 "xmlns: URI %s is not absolute\n") at error.c:612
#6  0xfe43668c in xmlWarningMsg (ctxt=0xfe518560,
error=XML_WAR_NS_URI_RELATIVE,
    msg=0xfe518560 "xmlns: URI %s is not absolute\n", str1=0x25f01b
"myURI", str2=0x0) at parser.c:415
#7  0xfe44593c in xmlParseStartTag2 (ctxt=0x206580, pref=0xffbeee34,
URI=0xffbeee30, tlen=0xffbeee2c)
    at parser.c:7854
#8  0xfe44719c in xmlParseElement (ctxt=0x206580) at parser.c:8437
#9  0xfe448b9c in xmlParseDocument (ctxt=0x206580) at parser.c:9129
#10 0xfe44e454 in xmlDoRead (ctxt=0x206580, URL=0x0, encoding=0x0,
options=16386, reuse=1)
    at parser.c:13101
#11 0xfe44e80c in xmlCtxtReadMemory (ctxt=0x206580, buffer=0x24e568 "",
size=29, URL=0x0, encoding=0x0,
    options=16386) at parser.c:13379
#12 0xfe649bd0 in __pyx_f_5etree_11_BaseParser__parseDoc
(__pyx_v_self=0x1c8630,
    __pyx_v_c_text=0x14f8bc "</RvXML>",
__pyx_v_c_len=29, __pyx_v_c_filename=0x0)
    at src/lxml/etree.c:20945
#13 0xfe64d438 in __pyx_f_5etree__parseDoc (__pyx_v_text=0x14f8a8,
__pyx_v_filename=0xf78f0,
    __pyx_v_parser=0x1c8630) at src/lxml/etree.c:22182
#14 0xfe64e5d4 in __pyx_f_5etree__parseMemoryDocument
(__pyx_v_text=0x14f8a8, __pyx_v_url=0xf78f0,
    __pyx_v_parser=0x1c8630) at src/lxml/etree.c:22653
#15 0xfe62a39c in __pyx_f_5etree_XML (__pyx_self=0x1c8630,
__pyx_args=0xf78f0, __pyx_kwds=0x0)
    at src/lxml/etree.c:9712
#16 0xcda64 in PyCFunction_Call (func=0x19a8f0, arg=0x2103f0, kw=0x0) at
Objects/methodobject.c:77
#17 0x82238 in call_function (pp_stack=0xffbef2f8, oparg=2163696) at
Python/ceval.c:3439
#18 0x7fd6c in eval_frame (f=0x1cd8f8) at Python/ceval.c:2116
#19 0x81318 in PyEval_EvalCodeEx (co=0x18db60, globals=0x0,
locals=0x1cd8f8, args=0x0, argcount=0,
    kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at
Python/ceval.c:2663
#20 0x8413c in PyEval_EvalCode (co=0x18db60, globals=0x1349c0,
locals=0x1349c0) at Python/ceval.c:537
#21 0xa7164 in run_node (n=0x124158, filename=0x18db60 "",
globals=0x1349c0, locals=0x1349c0,
    flags=0xffbef644) at Python/pythonrun.c:1267
#22 0xa7110 in run_err_node (n=0x124158, filename=0x18db60 "",
globals=0x1349c0, locals=0x1349c0,
    flags=0xffbef644) at Python/pythonrun.c:1254
#23 0xa6ce0 in PyRun_StringFlags (
    str=0x11a2d8 "from lxml import etree; elt =
etree.fromstring(\"\"\"</RvXML>\"\"\")\n",
start=907888, globals=0x1349c0, locals=0x1349c0, flags=0xffbef644) at
Python/pythonrun.c:1224
#24 0xa68cc in PyRun_SimpleStringFlags (
    command=0x11a2d8 "from lxml import etree; elt =
etree.fromstring(\"\"\"</RvXML>\"\"\")\n",
flags=0xffbef644) at Python/pythonrun.c:889
#25 0x1e034 in Py_Main (argc=4, argv=0xffbef72c) at Modules/main.c:399
#26 0x1d934 in main (argc=4, argv=0xffbef72c) at Modules/python.c:23
(gdb)

Full backtrace:

gdb /apps/prod/bin/python2.3
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "sparc-sun-solaris2.6"...
(gdb) r -i -c 'from lxml import etree; elt = etree.fromstring("""<RvXML
xmlns="myURI"></RvXML>""")'
Starting program: /apps/prod/bin/python2.3 -i -c 'from lxml import etree;
elt = etree.fromstring("""<RvXML xmlns="myURI"></RvXML>""")'
[New LWP    2        ]
[New LWP    3        ]
[New LWP    4        ]
[New LWP    5        ]

Program received signal SIGSEGV, Segmentation fault.
0xff07b760 in pthread_mutex_lock () from /usr/lib/libthread.so.1
(gdb) help bt
Print backtrace of all stack frames, or innermost COUNT frames.
With a negative argument, print outermost -COUNT frames.
Use of the 'full' qualifier also prints the values of the local variables.

(gdb) bt full
#0  0xff07b760 in pthread_mutex_lock () from /usr/lib/libthread.so.1
No symbol table info available.
#1  0xaa760 in PyThread_release_lock (lock=0x0) at
Python/thread_pthread.h:532
        thelock = (pthread_lock *) 0x0
#2  0x840c0 in PyEval_ReleaseThread (tstate=0x11abc0) at Python/ceval.c:339
No locals.
#3  0xa4338 in PyGILState_Release (oldstate=PyGILState_UNLOCKED) at
Python/pystate.c:473
        tcur = (PyThreadState *) 0x11abc0
#4  0xfe68ceb4 in __pyx_f_5etree__receiveError
(__pyx_v_c_log_handler=0x2146c0, __pyx_v_error=0x206700)
    at src/lxml/etree.c:15789
        __pyx_v_gil_state = PyGILState_UNLOCKED
#5  0xfe4324b4 in __xmlRaiseError (schannel=0xfe68ce68
<__pyx_f_5etree__receiveError>,
    channel=0xfe432880 <xmlParserWarning>, data=0x2146c0, ctx=0x206580,
nod=0x0, domain=1, code=100,
    level=XML_ERR_WARNING, file=0x0, line=1, str1=0x25f01b "myURI",
str2=0x0, str3=0x0, int1=0, col=13,
    msg=0xfe518560 "xmlns: URI %s is not absolute\n") at error.c:612
        file = 0x0
        int1 = 2180800
        msg = 0xfe518560 "xmlns: URI %s is not absolute\n"
        ctxt = 0x206580
        node = 0x0
        str = 0x209418 "xmlns: URI myURI is not absolute\n"
        input = 0x206700
        to = 0x206700
        baseptr = 0x0
#6  0xfe43668c in xmlWarningMsg (ctxt=0xfe518560,
error=XML_WAR_NS_URI_RELATIVE,
    msg=0xfe518560 "xmlns: URI %s is not absolute\n", str1=0x25f01b
"myURI", str2=0x0) at parser.c:415
        schannel = 0
#7  0xfe44593c in xmlParseStartTag2 (ctxt=0x206580, pref=0xffbeee34,
URI=0xffbeee30, tlen=0xffbeee2c)
    at parser.c:7854
        URL = (xmlChar *) 0x25f01b "myURI"
        uri = 0x20c1a8
        q = (xmlChar *) 0x25f01b "myURI"
        cons = 2146728
        len = 5
        alloc = 0
        localname = (xmlChar *) 0x25f015 "RvXML"
        prefix = (xmlChar *) 0x0
        attname = (xmlChar *) 0x25efea "xmlns"
        aprefix = (xmlChar *) 0x0
        nsname = (xmlChar *) 0x1 

        attvalue = (xmlChar *) 0x260bde "myURI\"></RvXML>"
        atts = (xmlChar **) 0x0
        maxatts = 0
        nratts = 0
        nbatts = 0
        nbdef = 0
        i = 2493392
        j = 2146728
        nbNs = 0
        attval = 0
        base = (xmlChar *) 0x260bd0 "</RvXML>"
        cur = 1
---Type <return> to continue, or q <return> to quit---
        nsNr = 0
#8  0xfe44719c in xmlParseElement (ctxt=0x206580) at parser.c:8437
        name = (xmlChar *) 0x0
        prefix = (xmlChar *) 0xfe45f03c "@\003¹¶\221* \001\200¢ "
        URI = (xmlChar *) 0xffbeee68 ""
        node_info = {
  node = 0xffbeee70,
  begin_pos = 804524,
  begin_line = 4290704056,
  end_pos = 1196856,
  end_line = 1023380
}
        line = 1
        tlen = 5
        ret = 0x0
        nsNr = 0
#9  0xfe448b9c in xmlParseDocument (ctxt=0x206580) at parser.c:9129
        start =   "</RvXML>",
__pyx_v_c_len=29, __pyx_v_c_filename=0x0)
    at src/lxml/etree.c:20945
        __pyx_v_state = (PyThreadState *) 0x11abc0
        __pyx_v_result = (xmlDoc *) 0x14f8bc
        __pyx_v_pctxt = (xmlParserCtxt *) 0x206580
        __pyx_r = (xmlDoc *) 0x0
        __pyx_1 = 0
        __pyx_2 = (PyObject *) 0x0
        __pyx_3 = (PyObject *) 0x0
        __pyx_4 = (xmlDoc *) 0x206580
        __pyx_5 = (PyObject *) 0x0
        __pyx_6 = (PyObject *) 0x206580
        __pyx_7 = (PyObject *) 0x0
#13 0xfe64d438 in __pyx_f_5etree__parseDoc (__pyx_v_text=0x14f8a8,
__pyx_v_filename=0xf78f0,
    __pyx_v_parser=0x1c8630) at src/lxml/etree.c:22182
        __pyx_v_c_filename = 0x0
        __pyx_v_filename_utf = (PyObject *) 0xf78f0
        __pyx_r = (xmlDoc *) 0x14f8a8
        __pyx_1 = 0
        __pyx_2 = (PyObject *) 0x0
        __pyx_4 = (xmlDoc *) 0x1c8630
        __pyx_5 = (xmlDoc *) 0x1c8630
#14 0xfe64e5d4 in __pyx_f_5etree__parseMemoryDocument
(__pyx_v_text=0x14f8a8, __pyx_v_url=0xf78f0,
    __pyx_v_parser=0x1c8630) at src/lxml/etree.c:22653
        __pyx_r = (struct LxmlDocument * ?) 0x0
---Type <return> to continue, or q <return> to quit---
        __pyx_1 = 0
        __pyx_2 = (PyObject *) 0x0
        __pyx_3 = (xmlDoc *) 0x14f8a8
#15 0xfe62a39c in __pyx_f_5etree_XML (__pyx_self=0x1c8630,
__pyx_args=0xf78f0, __pyx_kwds=0x0)
    at src/lxml/etree.c:9712
        __pyx_v_text = (PyObject *) 0x14f8a8
        __pyx_v_parser = (struct __pyx_obj_5etree__BaseParser * ?) 0x1c8630
        __pyx_v_doc = (struct LxmlDocument * ?) 0xf78f0
        __pyx_r = (PyObject *) 0x1c8630
        __pyx_2 = (PyObject *) 0x1c8630
        __pyx_argnames =   {0xfe696848 "text",
  0xfe695728 "parser",
  0x0}
#16 0xcda64 in PyCFunction_Call (func=0x19a8f0, arg=0x2103f0, kw=0x0) at
Objects/methodobject.c:77
        meth = 0xfe62a17c <__pyx_f_5etree_XML>
        self = (PyObject *) 0x0
        size = 2163708
#17 0x82238 in call_function (pp_stack=0xffbef2f8, oparg=2163696) at
Python/ceval.c:3439
        callargs = (PyObject *) 0x2103f0
        flags = 2163696
        na = 2163696
        nk = 0
        n = 1
        pfunc = (PyObject **) 0x1cda44
        func = (PyObject *) 0x19a8f0
        x = (PyObject *) 0xffbef2f8
        w = (PyObject *) 0x2103f0
#18 0x7fd6c in eval_frame (f=0x1cd8f8) at Python/ceval.c:2116
        stack_pointer = (PyObject **) 0x1cda48
        next_instr = (unsigned char *) 0x14f97d "Z\003"
        opcode = 131
        oparg = 1
        why = WHY_NOT
        err = 0
        x = (PyObject *) 0x14f8a8
        v = (PyObject *) 0x19b0d0
        w = (PyObject *) 0x19a660
        u = (PyObject *) 0x197e90
        t = (PyObject *) 0x83
        stream = (PyObject *) 0x0
        fastlocals = (PyObject **) 0x1cda44
        freevars = (PyObject **) 0x1cda44
        retval = (PyObject *) 0x0
        tstate = (PyThreadState *) 0x11abc0
        co = (PyCodeObject *) 0x18db60
        instr_ub = -1
        instr_lb = 0
        first_instr = (unsigned char *) 0x14f964 "d"
        names = (PyObject *) 0x133930
        consts = (PyObject *) 0x196a58
#19 0x81318 in PyEval_EvalCodeEx (co=0x18db60, globals=0x0,
locals=0x1cd8f8, args=0x0, argcount=0,
    kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at
Python/ceval.c:2663
---Type <return> to continue, or q <return> to quit---
        kwcount = 0
        closure = (PyObject *) 0x14f97d
        f = (PyFrameObject *) 0x1cd8f8
        retval = (PyObject *) 0x0
        fastlocals = (PyObject **) 0x1cda44
        freevars = (PyObject **) 0x1cda44
        tstate = (PyThreadState *) 0x11abc0
        x = (PyObject *) 0x0
        u = (PyObject *) 0xffffffff
#20 0x8413c in PyEval_EvalCode (co=0x18db60, globals=0x1349c0,
locals=0x1349c0) at Python/ceval.c:537
No locals.
#21 0xa7164 in run_node (n=0x124158, filename=0x18db60 "",
globals=0x1349c0, locals=0x1349c0,
    flags=0xffbef644) at Python/pythonrun.c:1267
        co = (PyCodeObject *) 0x18db60
        v = (PyObject *) 0x124158
#22 0xa7110 in run_err_node (n=0x124158, filename=0x18db60 "",
globals=0x1349c0, locals=0x1349c0,
    flags=0xffbef644) at Python/pythonrun.c:1254
No locals.
#23 0xa6ce0 in PyRun_StringFlags (
    str=0x11a2d8 "from lxml import etree; elt =
etree.fromstring(\"\"\"</RvXML>\"\"\")\n",
start=907888, globals=0x1349c0, locals=0x1349c0, flags=0xffbef644) at
Python/pythonrun.c:1224
No locals.
#24 0xa68cc in PyRun_SimpleStringFlags (
    command=0x11a2d8 "from lxml import etree; elt =
etree.fromstring(\"\"\"</RvXML>\"\"\")\n",
flags=0xffbef644) at Python/pythonrun.c:889
        m = (PyObject *) 0x11a2d8
        d = (PyObject *) 0x11a2d8
        v = (PyObject *) 0x101
#25 0x1e034 in Py_Main (argc=4, argv=0xffbef72c) at Modules/main.c:399
        c = 1155800
        sts = 1138696
        command = 0x11a2d8 "from lxml import etree; elt =
etree.fromstring(\"\"\"</RvXML>\"\"\")\n"
        filename = 0x0
        fp = (FILE *) 0x116008
        p = 0x11a2d8 "from lxml import etree; elt =
etree.fromstring(\"\"\"</RvXML>\"\"\")\n"
        inspect = 1
        unbuffered = 0
        skipfirstline = 0
        stdin_is_interactive = 1
        help = 0
        version = 0
        saw_inspect_flag = 1
        saw_unbuffered_flag = 1
        cf = {
  cf_flags = 0
}
#26 0x1d934 in main (argc=4, argv=0xffbef72c) at Modules/python.c:23
No locals.
(gdb)

2. Using illegal tag names:

Here  is the stack trace (no clue what the "warning: Lowest section in ..."
is supposed to mean, btw):

PYTHONPATH=/home/hjoukl/pydev/PyTAF/pytaf/__PytafTestInstallation_-Q3-ALPHA/lib/python2.3/site-packages/
 gdb /apps/pydev/bin/python2.3
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you
are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "sparc-sun-solaris2.6"...
(gdb) r
Starting program: /apps/pydev/bin/python2.3
warning: Lowest section in /lib/libdl.so.1 is .dynamic at 0x94
warning: Lowest section in /lib/libpthread.so.1 is .dynamic at 0x74
Python 2.3.4 (#3, Jul  7 2004, 12:07:09)
[GCC 2.95.2 19991024 (release)] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
...
...
...
from lxml import etree
elt = etree.fromstring('<root></root>')
elt = etree.fromstring('<root></root>')
Program received signal SIGSEGV, Segmentation fault.
0xff138dcc in mutex_lock_impl () from /lib/libc.so.1
(gdb) bt
#0  0xff138dcc in mutex_lock_impl () from /lib/libc.so.1
#1  0xaa760 in PyThread_release_lock (lock=0x0) at
Python/thread_pthread.h:532
#2  0x840c0 in PyEval_ReleaseThread (tstate=0x119cc8) at Python/ceval.c:339
#3  0xa4338 in PyGILState_Release (oldstate=PyGILState_UNLOCKED) at
Python/pystate.c:473
#4  0xfef0ceb4 in __pyx_f_5etree__receiveError
(__pyx_v_c_log_handler=0x2179e0, __pyx_v_error=0x209f30)
    at src/lxml/etree.c:15789
#5  0xfecb24b4 in __xmlRaiseError (schannel=0xfef0ce68
<__pyx_f_5etree__receiveError>, channel=0,
    data=0x2179e0, ctx=0x209db0, nod=0x0, domain=1, code=68,
level=XML_ERR_FATAL, file=0x0, line=1,
    str1=0x0, str2=0x0, str3=0x0, int1=0, col=9, msg=0xfed982d8 "error
parsing attribute name\n")
    at error.c:612
#6  0xfecb65c0 in xmlFatalErrMsg (ctxt=0x209db0,
error=XML_ERR_NAME_REQUIRED,
    msg=0xfed982d8 "error parsing attribute name\n") at parser.c:387
#7  0xfecc5428 in xmlParseAttribute2 (ctxt=0x209db0, pref=0x0,
elem=0x261933 "k", prefix=0xffbfec80,
    value=0xffbfec7c, len=0xffbfec78, alloc=0xffbfec74) at parser.c:7676
#8  0xfecc5864 in xmlParseStartTag2 (ctxt=0x209db0, pref=0xffbfed04,
URI=0xffbfed00, tlen=0xffbfecfc)
    at parser.c:7838
#9  0xfecc719c in xmlParseElement (ctxt=0x209db0) at parser.c:8437
#10 0xfecc6fa4 in xmlParseContent (ctxt=0x209db0) at parser.c:8361
#11 0xfecc7464 in xmlParseElement (ctxt=0x209db0) at parser.c:8521
#12 0xfecc8b9c in xmlParseDocument (ctxt=0x209db0) at parser.c:9129
#13 0xfecce454 in xmlDoRead (ctxt=0x209db0, URL=0x0, encoding=0x0,
options=16386, reuse=1)
    at parser.c:13101
#14 0xfecce80c in xmlCtxtReadMemory (ctxt=0x209db0, buffer=0x250e78 "",
size=34, URL=0x0, encoding=0x0,
    options=16386) at parser.c:13379
#15 0xfeec9bd0 in __pyx_f_5etree_11_BaseParser__parseDoc
(__pyx_v_self=0x21a1f0,
    __pyx_v_c_text=0x21a274 "<root></root>",
__pyx_v_c_len=34,
    __pyx_v_c_filename=0x0) at src/lxml/etree.c:20945
#16 0xfeecd438 in __pyx_f_5etree__parseDoc (__pyx_v_text=0x21a260,
__pyx_v_filename=0xf7918,
    __pyx_v_parser=0x21a1f0) at src/lxml/etree.c:22182
#17 0xfeece5d4 in __pyx_f_5etree__parseMemoryDocument
(__pyx_v_text=0x21a260, __pyx_v_url=0xf7918,
    __pyx_v_parser=0x21a1f0) at src/lxml/etree.c:22653
#18 0xfeeaa39c in __pyx_f_5etree_XML (__pyx_self=0x21a1f0,
__pyx_args=0xf7918, __pyx_kwds=0x0)
    at src/lxml/etree.c:9712
#19 0xcda64 in PyCFunction_Call (func=0x18f328, arg=0x2164d0, kw=0x0) at
Objects/methodobject.c:77
#20 0x82238 in call_function (pp_stack=0xffbff2d0, oparg=2188496) at
Python/ceval.c:3439
#21 0x7fd6c in eval_frame (f=0x179688) at Python/ceval.c:2116
#22 0x81318 in PyEval_EvalCodeEx (co=0x21a2a0, globals=0x0,
locals=0x179688, args=0x0, argcount=0,
    kws=0x0, kwcount=0, defs=0x0, defcount=0, closure=0x0) at
Python/ceval.c:2663
#23 0x8413c in PyEval_EvalCode (co=0x21a2a0, globals=0x1349c0,
locals=0x1349c0) at Python/ceval.c:537
#24 0xa7164 in run_node (n=0x1236c8, filename=0x21a2a0 "",
globals=0x1349c0, locals=0x1349c0,
    flags=0xffbff64c) at Python/pythonrun.c:1267
#25 0xa53f8 in PyRun_InteractiveOneFlags (fp=0x1236c8, filename=0xd0ed8
"<stdin>", flags=0xffbff64c)
    at Python/pythonrun.c:757
#26 0xa6a94 in PyRun_InteractiveLoopFlags (fp=0x116008, filename=0xd0ed8
"<stdin>", flags=0xffbff64c)
    at Python/pythonrun.c:690
#27 0xa683c in PyRun_AnyFileExFlags (fp=0x116008, filename=0xd0ed8
"<stdin>", closeit=0,
    flags=0xffbff64c) at Python/pythonrun.c:653
#28 0x1e0fc in Py_Main (argc=1, argv=0xffbff734) at Modules/main.c:415
#29 0x1d934 in main (argc=1, argv=0xffbff734) at Modules/python.c:23
(gdb)

Both work fine with python2.4, compiled with gcc 3.4.4:
1.
$ /apps/pydev/gcc/3.4.4/bin/python2.4
Python 2.4.3 (#1, Apr 12 2006, 11:57:09)
[GCC 3.4.4] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
...
...
...
from lxml import etree
elt = etree.fromstring("""<RvXML xmlns="myURI"></RvXML>""")
2.
$ /apps/pydev/gcc/3.4.4/bin/python2.4
Python 2.4.3 (#1, Apr 12 2006, 11:57:09)
[GCC 3.4.4] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
...
...
...
from lxml import etree
elt = etree.fromstring('<root></root>')
elt = etree.fromstring('<root></root>')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "etree.pyx", line 1695, in etree.XML
  File "parser.pxi", line 920, in etree._parseMemoryDocument
  File "parser.pxi", line 816, in etree._parseDoc
  File "parser.pxi", line 502, in etree._BaseParser._parseDoc
  File "parser.pxi", line 605, in etree._handleParseResult
  File "parser.pxi", line 576, in etree._raiseParseError
etree.XMLSyntaxError: line 1: Extra content at the end of the document
Greetings,
Holger

P.S.: I haven't forgotten about the objectify benchmarks, but these days
I find it hard dedicating myself to the true cause - but one fine day I
hope to come up with them.

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[lxml-dev] segfaults under python2.3 compiled with gcc 2.95.2

Holger Joukl

Stefan Behnel

Holger Joukl

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