[stefan@kistn ~]$ gdb programs/abs/zynaddsubfx/pkg/zynaddsubfx/usr/bin/zynaddsubfx /var/lib/systemd/coredump/core.zynaddsubfx.1000.9d7cc927120b451b979b0657a9015dd1.3569.1425420260000000 GNU gdb (GDB) 7.9 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 programs/abs/zynaddsubfx/pkg/zynaddsubfx/usr/bin/zynaddsubfx...done. [New LWP 3569] [New LWP 3572] [New LWP 3574] [New LWP 3573] 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 `pkg/zynaddsubfx/usr/bin/zynaddsubfx'. Program terminated with signal SIGABRT, Aborted. #0 0xb77cdbac in __kernel_vsyscall () (gdb) thread apply all bt Thread 4 (Thread 0xb59abb40 (LWP 3573)): #0 0xb77cdbac in __kernel_vsyscall () #1 0xb769b65b in read () from /usr/lib/libpthread.so.0 #2 0xb750fdd7 in ?? () from /usr/lib/libjack.so.0 #3 0xb7512e88 in ?? () from /usr/lib/libjack.so.0 #4 0xb750e1f8 in ?? () from /usr/lib/libjack.so.0 #5 0xb76931a6 in start_thread () from /usr/lib/libpthread.so.0 #6 0xb6f9c7ce in clone () from /usr/lib/libc.so.6 Thread 3 (Thread 0xb03a0b40 (LWP 3574)): #0 0xb77cdbac in __kernel_vsyscall () #1 0xb769a97f in do_futex_wait () from /usr/lib/libpthread.so.0 #2 0xb769aaf9 in __new_sem_wait_slow () from /usr/lib/libpthread.so.0 #3 0xb750eef9 in ?? () from /usr/lib/libjack.so.0 #4 0xb74f53b4 in ?? () from /usr/lib/libjack.so.0 #5 0xb74f7cf4 in ?? () from /usr/lib/libjack.so.0 #6 0xb74f44fb in ?? () from /usr/lib/libjack.so.0 #7 0xb74f3875 in ?? () from /usr/lib/libjack.so.0 #8 0xb750e1f8 in ?? () from /usr/lib/libjack.so.0 ---Type to continue, or q to quit--- #9 0xb76931a6 in start_thread () from /usr/lib/libpthread.so.0 #10 0xb6f9c7ce in clone () from /usr/lib/libc.so.6 Thread 2 (Thread 0xb5a2cb40 (LWP 3572)): #0 0xb77cdbac in __kernel_vsyscall () #1 0xb769826b in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 #2 0xb750f47a in ?? () from /usr/lib/libjack.so.0 #3 0xb75058b9 in ?? () from /usr/lib/libjack.so.0 #4 0xb750e1f8 in ?? () from /usr/lib/libjack.so.0 #5 0xb76931a6 in start_thread () from /usr/lib/libpthread.so.0 #6 0xb6f9c7ce in clone () from /usr/lib/libc.so.6 Thread 1 (Thread 0xb6a30740 (LWP 3569)): #0 0xb77cdbac in __kernel_vsyscall () #1 0xb6edeca7 in raise () from /usr/lib/libc.so.6 #2 0xb6ee02e9 in abort () from /usr/lib/libc.so.6 #3 0xb6ed7dd7 in __assert_fail_base () from /usr/lib/libc.so.6 #4 0xb6ed7e5b in __assert_fail () from /usr/lib/libc.so.6 #5 0xb71b98c9 in _XAllocID () from /usr/lib/libX11.so.6 #6 0xb719821f in XCreatePixmap () from /usr/lib/libX11.so.6 ---Type to continue, or q to quit--- #7 0xb6e7ad67 in XftDrawSrcPicture () from /usr/lib/libXft.so.2 #8 0xb6e7aef8 in XftDrawGlyphs () from /usr/lib/libXft.so.2 #9 0xb6e7b39f in XftDrawString32 () from /usr/lib/libXft.so.2 #10 0xb774b3c7 in Fl_Xlib_Graphics_Driver::draw(char const*, int, int, int) () from /usr/lib/libfltk.so.1.3 #11 0xb774663d in ?? () from /usr/lib/libfltk.so.1.3 #12 0xb7746dbe in fl_draw(char const*, int, int, int, int, unsigned int, void (*)(char const*, int, int, int), Fl_Image*, int) () from /usr/lib/libfltk.so.1.3 #13 0xb77478ec in fl_draw(char const*, int, int, int, int, unsigned int, Fl_Image*, int) () from /usr/lib/libfltk.so.1.3 #14 0xb774d5e9 in ?? () from /usr/lib/libfltk.so.1.3 #15 0xb774d6cc in Fl_Label::draw(int, int, int, int, unsigned int) const () from /usr/lib/libfltk.so.1.3 #16 0xb774d7f9 in Fl_Widget::draw_label(int, int, int, int, unsigned int) const () from /usr/lib/libfltk.so.1.3 #17 0xb76f3b92 in Fl_Group::draw_outside_label(Fl_Widget const&) const () from /usr/lib/libfltk.so.1.3 #18 0xb76f3cb9 in Fl_Group::draw_children() () from /usr/lib/libfltk.so.1.3 #19 0xb76f3de9 in Fl_Group::draw() () from /usr/lib/libfltk.so.1.3 #20 0xb76f3a94 in Fl_Group::draw_child(Fl_Widget&) const () from /usr/lib/libfltk.so.1.3 ---Type to continue, or q to quit--- #21 0xb76f3cb0 in Fl_Group::draw_children() () from /usr/lib/libfltk.so.1.3 #22 0xb76f3de9 in Fl_Group::draw() () from /usr/lib/libfltk.so.1.3 #23 0xb76f3a94 in Fl_Group::draw_child(Fl_Widget&) const () from /usr/lib/libfltk.so.1.3 #24 0xb76f3cb0 in Fl_Group::draw_children() () from /usr/lib/libfltk.so.1.3 #25 0xb77378f9 in Fl_Window::draw() () from /usr/lib/libfltk.so.1.3 #26 0xb76eb4dd in Fl_Double_Window::flush(int) () from /usr/lib/libfltk.so.1.3 #27 0xb76eb6aa in Fl_Double_Window::flush() () from /usr/lib/libfltk.so.1.3 #28 0xb76d9e1c in Fl::flush() () from /usr/lib/libfltk.so.1.3 #29 0xb76dafa8 in Fl::wait(double) () from /usr/lib/libfltk.so.1.3 #30 0x081484de in GUI::tickUi () at /home/stefan/programs/abs/zynaddsubfx/src/zynaddsubfx-2.5.0/src/UI/Connection.cpp:184 #31 0x0807f028 in main (argc=1, argv=0xbfdaa3f4) at /home/stefan/programs/abs/zynaddsubfx/src/zynaddsubfx-2.5.0/src/main.cpp:495