$ gdb ./qtcreator GNU gdb (GDB) 7.5.91.20130417-cvs-ubuntu Copyright (C) 2013 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: ... Reading symbols from /opt/qtcreator-3.1.0/bin/qtcreator...(no debugging symbols found)...done. (gdb) r Starting program: /opt/qtcreator-3.1.0/bin/qtcreator warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffa000 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7fffeeac8700 (LWP 8865)] [New Thread 0x7fffdf92e700 (LWP 8866)] [New Thread 0x7fffdf12d700 (LWP 8867)] [New Thread 0x7fffc3fd9700 (LWP 8871)] [New Thread 0x7fffc37d8700 (LWP 8877)] [New Thread 0x7fffc2fd7700 (LWP 8883)] [New Thread 0x7fffc18f5700 (LWP 8908)] [New Thread 0x7fff73eba700 (LWP 8963)] [New Thread 0x7fff7299b700 (LWP 8964)] [New Thread 0x7fff7154c700 (LWP 9091)] [Thread 0x7fffdf92e700 (LWP 8866) exited] [New Thread 0x7fffdf92e700 (LWP 9092)] [New Thread 0x7fff70bab700 (LWP 9093)] [Thread 0x7fff70bab700 (LWP 9093) exited] [New Thread 0x7fff70bab700 (LWP 9094)] [Thread 0x7fff70bab700 (LWP 9094) exited] Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7686b70 in QPlainTextEdit::document() const () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Widgets.so.5 (gdb) bt #0 0x00007ffff7686b70 in QPlainTextEdit::document() const () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Widgets.so.5 #1 0x00007fffcba26479 in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #2 0x00007fffcba26b2c in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #3 0x00007fffcba316e9 in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #4 0x00007fffcba319cb in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #5 0x00007fffcba31f8c in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #6 0x00007fffcba3765b in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #7 0x00007fffcba38182 in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #8 0x00007fffcba38766 in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #9 0x00007fffcba38a2c in ?? () from /opt/qtcreator-3.1.0/lib/qtcreator/plugins/QtProject/libFakeVim.so #10 0x00007ffff653395d in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Core.so.5 #11 0x00007ffff74990bf in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Widgets.so.5 #12 0x00007ffff749ce9e in QApplication::notify(QObject*, QEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Widgets.so.5 #13 0x00007ffff6533734 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Core.so.5 #14 0x00007ffff74f2fb0 in ?? () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Widgets.so.5 #15 0x00007ffff74990f4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Widgets.so.5 #16 0x00007ffff749c6ae in QApplication::notify(QObject*, QEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Widgets.so.5 #17 0x00007ffff6533734 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Core.so.5 #18 0x00007ffff6a59238 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Gui.so.5 #19 0x00007ffff6a62485 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Gui.so.5 #20 0x00007ffff6a49ba8 in QWindowSystemInterface::sendWindowSystemEvents(QFlags) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Gui.so.5 #21 0x00007ffff01641b0 in ?? () from /opt/qtcreator-3.1.0/bin/plugins/platforms/libqxcb.so #22 0x00007ffff52adf05 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007ffff52ae248 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #24 0x00007ffff52ae304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #25 0x00007ffff6584374 in QEventDispatcherGlib::processEvents(QFlags) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Core.so.5 #26 0x00007ffff65324ab in QEventLoop::exec(QFlags) () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Core.so.5 #27 0x00007ffff653653e in QCoreApplication::exec() () from /opt/qtcreator-3.1.0/bin/../lib/qtcreator/libQt5Core.so.5 #28 0x000000000040a44f in ?? () #29 0x00007ffff57d1ea5 in __libc_start_main (main=0x4068f0, argc=1, ubp_av=0x7fffffffdfb8, init=, fini=, rtld_fini=, stack_end=0x7fffffffdfa8) at libc-start.c:260 #30 0x000000000040a8f1 in ?? () #31 0x00007fffffffdfa8 in ?? () #32 0x000000000000001c in ?? () #33 0x0000000000000001 in ?? () #34 0x00007fffffffe30a in ?? () #35 0x0000000000000000 in ?? ()