$ gdb /usr/bin/python3-dbg core GNU gdb (GDB) 7.5-ubuntu Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "i686-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /usr/bin/python3-dbg...done. [New LWP 9122] warning: Can't read pathname for load map: Input/output error. [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1". Core was generated by `python3-dbg'. Program terminated with signal 11, Segmentation fault. #0 _dl_relocate_object (scope=0x8795938, reloc_mode=0, consider_profiling=0) at dl-reloc.c:239 239 dl-reloc.c: No such file or directory. (gdb) bt #0 _dl_relocate_object (scope=0x8795938, reloc_mode=0, consider_profiling=0) at dl-reloc.c:239 #1 0xb7791013 in dl_open_worker (a=0xbfb00910) at dl-open.c:407 #2 0xb778ccbf in _dl_catch_error (objname=0xbfb00934, errstring=0xbfb00938, mallocedp=0xbfb0093f, operate= 0xb7790c30 , args=0xbfb00910) at dl-error.c:178 #3 0xb77907e4 in _dl_open (file=0x88ede48 "/usr/lib/debug/usr/lib/python3/dist-packages/PyQt4/QtCore.cpython-32dmu.so", mode=-2147483646, caller_dlopen=0x8104e72 <_PyImport_GetDynLoadFunc+598>, nsid=-2, argc=1, argv=0xbfb01b74, env=0x878eff8) at dl-open.c:639 #4 0xb7732be9 in dlopen_doit (a=0xbfb00ae0) at dlopen.c:67 #5 0xb778ccbf in _dl_catch_error (objname=0x885082c, errstring=0x8850830, mallocedp=0x8850828, operate= 0xb7732b50 , args=0xbfb00ae0) at dl-error.c:178 #6 0xb773333a in _dlerror_run (operate=0xb7732b50 , args=0xbfb00ae0) at dlerror.c:164 #7 0xb7732c97 in __dlopen (file=0x88ede48 "/usr/lib/debug/usr/lib/python3/dist-packages/PyQt4/QtCore.cpython-32dmu.so", mode=2) at dlopen.c:88 #8 0x08104e72 in _PyImport_GetDynLoadFunc (fqname=0x88ece30 "PyQt4.QtCore", shortname=0x88ece36 "QtCore", pathname= 0x88ede48 "/usr/lib/debug/usr/lib/python3/dist-packages/PyQt4/QtCore.cpython-32dmu.so", fp=0x88bfbd8) at ../Python/dynload_shlib.c:139 #9 0x080e21b8 in _PyImport_LoadDynamicModule (name=0x88ece30 "PyQt4.QtCore", pathname= 0x88ede48 "/usr/lib/debug/usr/lib/python3/dist-packages/PyQt4/QtCore.cpython-32dmu.so", fp=0x88bfbd8) at ../Python/importdl.c:51 #10 0x080ddbd8 in load_module (name=0x88ece30 "PyQt4.QtCore", fp=0x88bfbd8, pathname= 0x88ede48 "/usr/lib/debug/usr/lib/python3/dist-packages/PyQt4/QtCore.cpython-32dmu.so", type=3, loader=0x0) at ../Python/import.c:2161 #11 0x080dfb6d in import_submodule (mod=, subname=0x88ece36 "QtCore", fullname= 0x88ece30 "PyQt4.QtCore") at ../Python/import.c:2971 #12 0x080df155 in load_next (mod=, altmod=, p_name=0xbfb00f10, buf= 0x88ece30 "PyQt4.QtCore", p_buflen=0xbfb00ee4) at ../Python/import.c:2778 #13 0x080de543 in import_module_level (name=0x0, globals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, locals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, fromlist=None, level=0) at ../Python/import.c:2490 #14 0x080de99b in PyImport_ImportModuleLevel (name=0x891d200 "PyQt4.QtCore", globals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, locals= {'__builtins__': , 'PyQt4': , 'sys': ---Type to continue, or q to quit--- , '__name__': '__main__', '__package__': None, '__doc__': None}, fromlist=None, level=0) at ../Python/import.c:2546 #15 0x080aa559 in builtin___import__ (self=, args= (, ), kwds=0x0) at ../Python/bltinmodule.c:191 #16 0x08200664 in PyCFunction_Call (func=, arg= (, ), kw=0x0) at ../Objects/methodobject.c:84 #17 0x081b36ed in PyObject_Call (func=, arg= (, ), kw=0x0) at ../Objects/abstract.c:2149 #18 0x080c2ce3 in PyEval_CallObjectWithKeywords (func=, arg= (, ), kw=0x0) at ../Python/ceval.c:3801 #19 0x080bbc96 in PyEval_EvalFrameEx (f=Frame 0x88bf8c4, for file , line 1, in (), throwflag=0) at ../Python/ceval.c:2351 #20 0x080c1903 in PyEval_EvalCodeEx (_co=, globals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, locals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, args=0x0, argcount=0, kws=0x0, kwcount=0, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0) at ../Python/ceval.c:3350 #21 0x080b1c78 in PyEval_EvalCode (co=, globals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, locals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}) at ../Python/ceval.c:767 #22 0x080f0775 in run_mod (mod=0x88eae60, filename=0x8240e9a "", globals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, locals= {'__builtins__': , 'PyQt4': , 'sys': , '__name__': '__main__', '__package__': None, '__doc__': None}, flags=0xbfb019d0, arena=0x8796270) at ../Python/pythonrun.c:1828 #23 0x080ee846 in PyRun_InteractiveOneFlags (fp=0xb76bcac0 <_IO_2_1_stdin_>, filename=0x8240e9a "", flags=0xbfb019d0) at ../Python/pythonrun.c:1203 #24 0x080ee32b in PyRun_InteractiveLoopFlags (fp=0xb76bcac0 <_IO_2_1_stdin_>, filename=0x8240e9a "", flags=0xbfb019d0) at ../Python/pythonrun.c:1093 #25 0x080ee189 in PyRun_AnyFileExFlags (fp=0xb76bcac0 <_IO_2_1_stdin_>, filename=0x8240e9a "", closeit=0, flags= 0xbfb019d0) at ../Python/pythonrun.c:1062 #26 0x08107667 in run_file (fp=0xb76bcac0 <_IO_2_1_stdin_>, filename=0x0, p_cf=0xbfb019d0) at ../Modules/main.c:307 #27 0x081082f3 in Py_Main (argc=1, argv=0xb74d4028) at ../Modules/main.c:733 #28 0x0805c86a in main (argc=1, argv=0xbfb01b74) at ../Modules/python.c:65