Hi,
I am tracing the cause of a segmentation fault, apparently in the
libxml2 module.
My application is purely python and uses the libxml2 library for simple
data file look-up.
The core file is useless as it just indicates the main module name and a
physical memory address that has not meaning to me.
The python trace module produces the following:
ErrCode.py(43): _doc = libxml2.parseFile(
self.__dataFile )
ErrCode.py(47): _ctxt = _doc.xpathNewContext()
ErrCode.py(51): _xpath =
"/ERROR_TABLE/r...@code=\"%s\"]/@msg" % code
ErrCode.py(53): _parms = _ctxt.xpathEval( _xpath )
ErrCode.py(56): _doc.freeDoc()
--- modulename: libxml2, funcname: freeDoc
libxml2.py(4079): libxml2mod.xmlFreeDoc(self._o)
ErrCode.py(57): _ctxt.xpathFreeContext()
--- modulename: libxml2, funcname: xpathFreeContext
libxml2.py(6849):
libxml2mod.xmlXPathFreeContext(self._o)
ErrCode.py(64): for _pm in _parms:
ErrCode.py(65): return (code,_pm.content)
--- modulename: libxml2, funcname: get_content
libxml2.py(267): return
libxml2mod.xmlNodeGetContent(self._o)
Segmentation fault
The purpose of the ErrCode module is to determine if a numberic
value (code) exists in the XML described table.
Line 65 returns the first value found. Duplicates are of no
concern.
Since the symbol _pm is not None, due to the "for _pm...", there
must be an issue with the libxml2 object referenced by _pm.
Question: is _pm content valid after the xmlPathFreeContext?.
Ed Oswalt
GE Healthcare
Software Architect
phone: (262) 312-7077
email: [email protected]
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