As mentioned in: http://lists.dwarfstd.org/private.cgi/dwarf-discuss-dwarfstd.org/2010-April/000847.html http://gcc.gnu.org/ml/gcc-patches/2010-04/msg01422.html and following threads, GCC generates invalid unwind info on i?86/x86_64, where DW_OP_cfa_def_cfa_expression is followed by DW_OP_cfa_def_cfa_{register,offset{,_sf}} and thus either the CFA offset or register is undefined. It is not possible to unwind through such code then.
gcc-4.4.4-2.fc13,libtool-2.2.6-20.fc13 has been submitted as an update for Fedora 13. http://admin.fedoraproject.org/updates/gcc-4.4.4-2.fc13,libtool-2.2.6-20.fc13
gcc-4.4.4-2.fc13, libtool-2.2.6-20.fc13 has been pushed to the Fedora 13 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update gcc libtool'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/gcc-4.4.4-2.fc13,libtool-2.2.6-20.fc13
gcc-4.4.4-2.fc13, libtool-2.2.6-20.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.