[e@X60s ~]$ gdb /usr/bin/mscore /tmp/core.mscore.1000.b6cf7d5e8a5a4e57b504443ac94fd53f.1105.1456547864000000000000 GNU gdb (GDB) 7.10.1 Copyright (C) 2015 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-pc-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: . Find the GDB manual and other documentation resources online at: . For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /usr/bin/mscore...(no debugging symbols found)...done. [New LWP 1107] [New LWP 1109] [New LWP 1110] [New LWP 1105] [New LWP 1111] [New LWP 1132] [New LWP 1113] [New LWP 1131] [New LWP 1106] warning: Could not load shared library symbols for linux-gate.so.1. Do you need "set solib-search-path" or "set sysroot"? [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". Core was generated by `mscore'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0xb36f39fe in QNetworkConfigurationManagerPrivate::pollEngines() () from /usr/lib/libQt5Network.so.5 [Current thread is 1 (Thread 0xa7b5cb40 (LWP 1107))] (gdb) thread apply all bt Thread 9 (Thread 0xaebaeb40 (LWP 1106)): #0 0xb770ec11 in __kernel_vsyscall () #1 0xb2268cef in poll () from /usr/lib/libc.so.6 #2 0xb0ad6fcd in ?? () from /usr/lib/libxcb.so.1 #3 0xb0ad914b in xcb_wait_for_event () from /usr/lib/libxcb.so.1 #4 0xaed73f23 in ?? () #5 0x0b4acf78 in ?? () Backtrace stopped: previous frame inner to this frame (corrupt stack?) Thread 8 (Thread 0xa2e0fb40 (LWP 1131)): #0 0xb770ec11 in __kernel_vsyscall () #1 0xb2268cef in poll () from /usr/lib/libc.so.6 #2 0xb18a6740 in g_poll () from /usr/lib/libglib-2.0.so.0 #3 0xb1897cdc in ?? () from /usr/lib/libglib-2.0.so.0 #4 0xb1897e14 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #5 0xb1897e70 in ?? () from /usr/lib/libglib-2.0.so.0 #6 0xb18bebca in ?? () from /usr/lib/libglib-2.0.so.0 #7 0xb684a291 in start_thread () from /usr/lib/libpthread.so.0 #8 0xb2272d7e in clone () from /usr/lib/libc.so.6 Thread 7 (Thread 0xa4efeb40 (LWP 1113)): #0 0xb770ec11 in __kernel_vsyscall () #1 0xb2268cef in poll () from /usr/lib/libc.so.6 #2 0xb18a6740 in g_poll () from /usr/lib/libglib-2.0.so.0 #3 0xb1897cdc in ?? () from /usr/lib/libglib-2.0.so.0 #4 0xb1897e14 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #5 0xb2783483 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/libQt5Core.so.5 #6 0xb2728733 in QEventLoop::processEvents(QFlags) () from /usr/lib/libQt5Core.so.5 #7 0xb2728b8a in QEventLoop::exec(QFlags) () from /usr/lib/libQt5Core.so.5 #8 0xb255c1fd in QThread::exec() () from /usr/lib/libQt5Core.so.5 #9 0xb255c2d8 in QThread::run() () from /usr/lib/libQt5Core.so.5 #10 0xb256170b in ?? () from /usr/lib/libQt5Core.so.5 #11 0xb684a291 in start_thread () from /usr/lib/libpthread.so.0 #12 0xb2272d7e in clone () from /usr/lib/libc.so.6 Thread 6 (Thread 0xa260eb40 (LWP 1132)): #0 0xb770ec11 in __kernel_vsyscall () #1 0xb2268cef in poll () from /usr/lib/libc.so.6 #2 0xb18a6740 in g_poll () from /usr/lib/libglib-2.0.so.0 #3 0xb1897cdc in ?? () from /usr/lib/libglib-2.0.so.0 #4 0xb18980f9 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0 #5 0xad9963e5 in ?? () from /usr/lib/libgio-2.0.so.0 #6 0xb18bebca in ?? () from /usr/lib/libglib-2.0.so.0 #7 0xb684a291 in start_thread () from /usr/lib/libpthread.so.0 #8 0xb2272d7e in clone () from /usr/lib/libc.so.6 Thread 5 (Thread 0xa5affb40 (LWP 1111)): #0 0xb770ec11 in __kernel_vsyscall () #1 0xb684faab in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #2 0xb52b421c in WTF::ThreadCondition::wait(WTF::Mutex&) () from /usr/lib/libQt5WebKit.so.5 #3 0xb4f75495 in ?? () from /usr/lib/libQt5WebKit.so.5 #4 0xb529c7e2 in ?? () from /usr/lib/libQt5WebKit.so.5 #5 0xb52b3c21 in ?? () from /usr/lib/libQt5WebKit.so.5 #6 0xb684a291 in start_thread () from /usr/lib/libpthread.so.0 #7 0xb2272d7e in clone () from /usr/lib/libc.so.6 ---Type to continue, or q to quit--- Thread 4 (Thread 0xaef5e780 (LWP 1105)): #0 0x089468f0 in ?? () #1 0xb21ba6e3 in __run_exit_handlers () from /usr/lib/libc.so.6 #2 0xb21ba73f in exit () from /usr/lib/libc.so.6 #3 0xb21a4533 in __libc_start_main () from /usr/lib/libc.so.6 #4 0x0826ce66 in _start () Thread 3 (Thread 0xa64b2b40 (LWP 1110)): #0 0xb770ec11 in __kernel_vsyscall () #1 0xb684faab in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #2 0xb52b421c in WTF::ThreadCondition::wait(WTF::Mutex&) () from /usr/lib/libQt5WebKit.so.5 #3 0xb4f74306 in ?? () from /usr/lib/libQt5WebKit.so.5 #4 0xb529c7e2 in ?? () from /usr/lib/libQt5WebKit.so.5 #5 0xb52b3c21 in ?? () from /usr/lib/libQt5WebKit.so.5 #6 0xb684a291 in start_thread () from /usr/lib/libpthread.so.0 #7 0xb2272d7e in clone () from /usr/lib/libc.so.6 Thread 2 (Thread 0xa6de8b40 (LWP 1109)): #0 0xb770ec11 in __kernel_vsyscall () #1 0xb684faab in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #2 0xb528591a in ?? () from /usr/lib/libQt5WebKit.so.5 #3 0xb528596c in ?? () from /usr/lib/libQt5WebKit.so.5 #4 0xb684a291 in start_thread () from /usr/lib/libpthread.so.0 #5 0xb2272d7e in clone () from /usr/lib/libc.so.6 Thread 1 (Thread 0xa7b5cb40 (LWP 1107)): #0 0xb36f39fe in QNetworkConfigurationManagerPrivate::pollEngines() () from /usr/lib/libQt5Network.so.5 #1 0xb3764309 in ?? () from /usr/lib/libQt5Network.so.5 #2 0xb275a893 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQt5Core.so.5 #3 0xb275ad9d in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQt5Core.so.5 #4 0xb27dc7b2 in QTimer::timeout(QTimer::QPrivateSignal) () from /usr/lib/libQt5Core.so.5 #5 0xb2767bc1 in QTimer::timerEvent(QTimerEvent*) () from /usr/lib/libQt5Core.so.5 #6 0xb275b48e in QObject::event(QEvent*) () from /usr/lib/libQt5Core.so.5 #7 0xb300c26a in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #8 0xb3011930 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQt5Widgets.so.5 #9 0xb272b38f in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQt5Core.so.5 #10 0xb27821ab in QTimerInfoList::activateTimers() () from /usr/lib/libQt5Core.so.5 #11 0xb2782779 in ?? () from /usr/lib/libQt5Core.so.5 #12 0xb1897aa9 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #13 0xb1897d49 in ?? () from /usr/lib/libglib-2.0.so.0 #14 0xb1897e14 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #15 0xb2783483 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/libQt5Core.so.5 #16 0xb2728733 in QEventLoop::processEvents(QFlags) () from /usr/lib/libQt5Core.so.5 #17 0xb2728b8a in QEventLoop::exec(QFlags) () from /usr/lib/libQt5Core.so.5 #18 0xb255c1fd in QThread::exec() () from /usr/lib/libQt5Core.so.5 #19 0xb255c2d8 in QThread::run() () from /usr/lib/libQt5Core.so.5 #20 0xb256170b in ?? () from /usr/lib/libQt5Core.so.5 #21 0xb684a291 in start_thread () from /usr/lib/libpthread.so.0 #22 0xb2272d7e in clone () from /usr/lib/libc.so.6 (gdb)