. Thread 2 (Thread 0x7fd1c4fc7700 (LWP 2081)): #0 0x00007fd1cd7bf893 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fd1cdcede86 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007fd1cdcee2ea in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007fd1ce6e8b56 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #4 0x00007fd1cdd0f485 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007fd1cda90e2b in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007fd1cd7cb0dd in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #7 0x0000000000000000 in ?? () No symbol table info available. . Thread 1 (Thread 0x7fd1cfa07940 (LWP 2054)): #0 0x00007fd1cd71d3b5 in raise () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fd1cd720b1b in abort () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #2 0x00007fd1cd715d2d in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #3 0x00007fd1cf523603 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #4 0x00007fd1cf523621 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #5 0x00007fd1cf523d4d in _XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #6 0x00007fd1cf51541d in XPending () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #7 0x00007fd1ce9be804 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 No symbol table info available. #8 0x00007fd1cdced8c3 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #9 0x00007fd1cdcede26 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #10 0x00007fd1cdcee2ea in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #11 0x00000000004117ee in main () No symbol table info available.