Bug 178592
| Summary: | Libxml++ segfaults because of latest libsigc++ ? | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Fabrice Colin <fabrice.colin> |
| Component: | libxml++ | Assignee: | Konstantin Ryabitsev <icon> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4 | CC: | extras-qa |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | 2.12.0-2 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-02-13 19:13:41 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Sorry for the delay. I can confirm the segfaults, so I will fire off a rebuild shortly. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.7.12) Gecko/20050922 Fedora/1.0.7-1.1.fc4 Firefox/1.0.7 Description of problem: I am experiencing segfaults in a program of mine that uses libxml++. To find out where the problem lies, I tried the examples that come with libxml++-devel and they segault too. It looks like there's a conflict with libstdc++ (libstdc++-4.0.2-8.fc4). What makes me say that is : - that problem appeared after I updated my (then up-to-date) system at the end of november and installed the afore-mentioned version of libstdc++. - the backtrace points to gnu_cxx symbols - the problem goes away if I rebuild libxml++ using the SRPM If I compile "/usr/share/doc/libxml++-devel-2.12.0/examples/dom_parser/main.cc" and run the executable against any XML file, say "/etc/gaim/prefs.xml", I'll get this output : Node name = pref Node name = pref line = 3 Attribute version = 1.0 Attribute name = / Segmentation fault gdb shows this backtrace : (gdb) bt #0 0x00270483 in __gnu_cxx::__pool<true>::_M_reclaim_block () from /usr/lib/libstdc++.so.6 #1 0x0804a469 in __gnu_cxx::__mt_alloc<std::_List_node<xmlpp::Attribute*>, __gnu_cxx::__common_pool_policy<__gnu_cxx::__pool, true> >::deallocate () #2 0x0804a485 in std::_List_base<xmlpp::Attribute*, std::allocator<xmlpp::Attribute*> >::_M_put_node () #3 0x0804a4ee in std::_List_base<xmlpp::Attribute*, std::allocator<xmlpp::Attribute*> >::_M_clear () #4 0x0804a512 in std::_List_base<xmlpp::Attribute*, std::allocator<xmlpp::Attribute*> >::~_List_base$base () #5 0x0804a56a in std::list<xmlpp::Attribute*, std::allocator<xmlpp::Attribute*> >::~list () #6 0x08049c6e in print_node () #7 0x08049ece in main () Commenting out parser.set_validate(), line 124, to disable DTD validation will help testing with any XML file. This happens every time for me with FC4/i386. I saw it happen on ppc too, but cannot confirm right now whether the problem still exists on that platform. Could it be some kind of ABI compatibility issues ? I saw somebody reported a similar issue (with Debian) on the libxmlplusplus-general mailing list : http://sourceforge.net/mailarchive/forum.php?thread_id=8989783&forum_id=12784 I hope this helps. Fabrice Version-Release number of selected component (if applicable): libxml++-2.12.0-1.fc4 How reproducible: Always Steps to Reproduce: 1. $ cp /usr/share/doc/libxml++-devel-2.12.0/examples/dom_parser/main.cc xmltest.cc 2. Comment out "parser.set_validate();", line 124 3. $ g++ -c xmltest.cc -o xmltest.o `pkg-config --cflags libxml++-2.6` 4. $ libtool --mode=link g++ -fPIC -o xmltest xmltest.o `pkg-config --libs libxml++-2.6` 5. Run against any XML file, for instance $ ./xmltest /etc/gaim/prefs.xml 6. See segfault 7. Get the libxml++ SRPM, rebuild and install RPMs 8. Recompile and relink xmltest, run 5. again : the program will then work correctly Actual Results: Step 5 : xmltest fails with this output : Node name = pref Node name = pref line = 3 Attribute version = 1.0 Attribute name = / Segmentation fault Expected Results: xmltest should print a dump of the XML document, as follows : Node name = pref Node name = pref line = 3 Attribute version = 1.0 Attribute name = / Node name = pref Node name = pref line = 4 Attribute name = core ... Additional info: