(gdb) bt full #0 0x00007f3af9761d36 in poll () from /lib/libc.so.6 No symbol table info available. #1 0x00007f3af283cd89 in ?? () from /usr/lib/libglib-2.0.so.0 No symbol table info available. #2 0x00007f3af283d06c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 No symbol table info available. #3 0x00007f3af4756bff in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/libQtCore.so.4 No symbol table info available. #4 0x00007f3af3c3d64f in ?? () from /usr/lib/libQtGui.so.4 No symbol table info available. #5 0x00007f3af472cde2 in QEventLoop::processEvents(QFlags) () from /usr/lib/libQtCore.so.4 No symbol table info available. #6 0x00007f3af472d1b4 in QEventLoop::exec(QFlags) () from /usr/lib/libQtCore.so.4 No symbol table info available. #7 0x00007f3af472f424 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4 No symbol table info available. #8 0x00007f3af571065a in TrustedMain () from /usr/lib/virtualbox/VirtualBox.so No symbol table info available. #9 0x00007f3af96bc5c6 in __libc_start_main () from /lib/libc.so.6 No symbol table info available. #10 0x0000000000401109 in ?? () No symbol table info available. #11 0x00007fffc86dd1f8 in ?? () No symbol table info available. #12 0x000000000000001c in ?? () No symbol table info available. #13 0x0000000000000005 in ?? () No symbol table info available. #14 0x00007fffc86de759 in ?? () No symbol table info available. #15 0x00007fffc86de778 in ?? () No symbol table info available. #16 0x00007fffc86de782 in ?? () No symbol table info available. #17 0x00007fffc86de794 in ?? () No symbol table info available. #18 0x00007fffc86de79e in ?? () No symbol table info available. #19 0x0000000000000000 in ?? () No symbol table info available.