$ gdb GNU gdb (GDB) 7.1-ubuntu Copyright (C) 2010 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 "x86_64-linux-gnu". For bug reporting instructions, please see: . (gdb) file /usr/bin/python Reading symbols from /usr/bin/python...(no debugging symbols found)...done. (gdb) run qgis_crash.py Starting program: /usr/bin/python qgis_crash.py [Thread debugging using libthread_db enabled] Data source is invalid [New Thread 0x7fffe2f0f710 (LWP 14764)] [Thread 0x7fffe2f0f710 (LWP 14764) exited] Program received signal SIGSEGV, Segmentation fault. 0x00007ffff505294d in QApplication::d_func (this=0xbd02e0) at ../../include/QtGui/../../src/gui/kernel/qapplication.h:376 376 ../../include/QtGui/../../src/gui/kernel/qapplication.h: Nessun file o directory. in ../../include/QtGui/../../src/gui/kernel/qapplication.h (gdb) (gdb) bt #0 0x00007ffff505294d in QApplication::d_func (this=0xbd02e0) at ../../include/QtGui/../../src/gui/kernel/qapplication.h:376 #1 QGraphicsScenePrivate::init (this=0xbd02e0) at graphicsview/qgraphicsscene.cpp:335 #2 0x00007ffff5052ad3 in QGraphicsScene (this=0xb71c10, parent=0x0) at graphicsview/qgraphicsscene.cpp:1559 #3 0x00007ffff5dc518b in QgsComposition::QgsComposition(QgsMapRenderer*) () from /usr/lib/libqgis_core.so.1.6.0 #4 0x00007ffff6738899 in sipQgsComposition::sipQgsComposition(QgsMapRenderer*) () from /usr/lib/python2.6/dist-packages/qgis/core.so #5 0x00007ffff673897a in ?? () from /usr/lib/python2.6/dist-packages/qgis/core.so #6 0x00007fffe902f24a in ?? () from /usr/lib/pymodules/python2.6/sip.so #7 0x000000000046f47f in ?? () #8 0x000000000041f0c7 in PyObject_Call () #9 0x00000000004a7378 in PyEval_EvalFrameEx () #10 0x00000000004a9671 in PyEval_EvalCodeEx () #11 0x00000000004a9742 in PyEval_EvalCode () #12 0x00000000004c9a0e in PyRun_FileExFlags () #13 0x00000000004c9c24 in PyRun_SimpleFileExFlags () #14 0x000000000041a7ff in Py_Main () #15 0x00007ffff69d8c4d in __libc_start_main (main=, argc=, ubp_av=, init=, fini=, rtld_fini=, stack_end=0x7fffffffe2a8) at libc-start.c:226 #16 0x00000000004199f9 in _start () (gdb)