#0  0x00007f20dbabd475 in __GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <optimized out>
        selftid = 14359
#1  0x00007f20dbac0bdb in __GI_abort () at abort.c:91
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7f20d7ceead8, sa_sigaction = 0x7f20d7ceead8}, sa_mask = {__val = {139779102470941, 21517728, 0, 139777642510832, 139779101371298, 139779036343000, 206158430232, 139777642510848, 139777642510624, 139775422983470, 206158430256, 139777428962384, 139777428946976, 139779102476088, 0, 140736311795282}}, sa_flags = -608185565, sa_restorer = 0x7f20d7ceed92}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f20dbab610e in __assert_fail_base (fmt=<optimized out>, assertion=0x7f20d7ceead8 "!xcb_xlib_threads_sequence_lost", file=0x7f20d7ceed92 "../../src/xcb_io.c", line=<optimized out>, function=<optimized out>) at assert.c:94
        str = 0x7f2078003c50 ""
        total = 4096
#3  0x00007f20dbab61b2 in __GI___assert_fail (assertion=0x7f20d7ceead8 "!xcb_xlib_threads_sequence_lost", file=0x7f20d7ceed92 "../../src/xcb_io.c", line=273, function=0x7f20d7ceeeb8 "poll_for_event") at assert.c:103
No locals.
#4  0x00007f20d7c7c603 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#5  0x00007f20d7c7c621 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#6  0x00007f20d7c7cd4d in _XEventsQueued () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#7  0x00007f20d7c6e41d in XPending () from /usr/lib/x86_64-linux-gnu/libX11.so.6
No symbol table info available.
#8  0x00007f20d81cd99b in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#9  0x00007f20d81a0561 in gdk_display_get_event () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#10 0x00007f20d81cd762 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#11 0x00007f20dabfab2a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#12 0x00007f20dabfaef0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#13 0x00007f20dabfafb4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#14 0x00007f20d85922f5 in gtk_main_iteration () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#15 0x00007f20da24ca14 in ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#16 0x00007f20da24c435 in ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#17 0x00007f20db0fc860 in ?? () from /usr/lib/libgirepository-1.0.so.1
No symbol table info available.
#18 0x00007f20db0fdbce in g_function_info_invoke () from /usr/lib/libgirepository-1.0.so.1
No symbol table info available.
#19 0x00007f20db336ae8 in ?? () from /usr/lib/python2.7/dist-packages/gi/_gi.so
No symbol table info available.
#20 0x00000000004ba531 in PyEval_EvalFrameEx ()
No symbol table info available.
#21 0x00000000004bd345 in PyEval_EvalCodeEx ()
No symbol table info available.
#22 0x00000000004b6a9a in PyEval_EvalFrameEx ()
No symbol table info available.
#23 0x00000000004b6db7 in PyEval_EvalFrameEx ()
No symbol table info available.
#24 0x00000000004bcd4d in PyEval_EvalCodeEx ()
No symbol table info available.
#25 0x0000000000449248 in ?? ()
No symbol table info available.
#26 0x000000000041ae3a in PyObject_Call ()
No symbol table info available.
#27 0x00000000004b8500 in PyEval_EvalFrameEx ()
No symbol table info available.
#28 0x00000000004b6db7 in PyEval_EvalFrameEx ()
No symbol table info available.
#29 0x00000000004b6db7 in PyEval_EvalFrameEx ()
No symbol table info available.
#30 0x00000000004bcd4d in PyEval_EvalCodeEx ()
No symbol table info available.
#31 0x000000000044908f in ?? ()
No symbol table info available.
#32 0x000000000041ae3a in PyObject_Call ()
No symbol table info available.
#33 0x00000000004308ae in ?? ()
No symbol table info available.
#34 0x000000000041ae3a in PyObject_Call ()
No symbol table info available.
#35 0x00000000004b5dd6 in PyEval_CallObjectWithKeywords ()
No symbol table info available.
#36 0x00000000004f0790 in ?? ()
No symbol table info available.
#37 0x00007f20dcd61e9a in start_thread (arg=0x7f2084bad700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f2084bad700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2098239903566002126, 140736311786976, 139777642518976, 0, 3, 2062794422730754098, 2062706081144375346}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#38 0x00007f20dbb7777d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#39 0x0000000000000000 in ?? ()
No symbol table info available.