#0  0x00007f4759afcf77 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  [Error: ../nptl/sysdeps/unix/sysv/linux/raise.c was not found in source tree]
#1  0x00007f4759b005e8 in __GI_abort () at abort.c:90
  [Error: abort.c was not found in source tree]
#2  0x00007f4759af5d43 in __assert_fail_base (fmt=0x7f475ab33dc5 <Address 0x7f475ab33dc5 out of bounds>, assertion=assertion@entry=0x7f475659ccd8 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7f475659cb23 "../../src/xcb_io.c", line=line@entry=274, function=function@entry=0x7f475659cfe6 <__PRETTY_FUNCTION__.14361> "poll_for_event") at assert.c:92
  [Error: assert.c was not found in source tree]
#3  0x00007f4759af5df2 in __GI___assert_fail (assertion=assertion@entry=0x7f475659ccd8 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7f475659cb23 "../../src/xcb_io.c", line=line@entry=274, function=function@entry=0x7f475659cfe6 <__PRETTY_FUNCTION__.14361> "poll_for_event") at assert.c:101
  [Error: assert.c was not found in source tree]
#4  0x00007f475652d289 in poll_for_event (dpy=dpy@entry=0x1f2cce0) at ../../src/xcb_io.c:271
  [Error: ../../src/xcb_io.c was not found in source tree]
#5  0x00007f475652d31e in poll_for_response (dpy=dpy@entry=0x1f2cce0) at ../../src/xcb_io.c:289
  [Error: ../../src/xcb_io.c was not found in source tree]
#6  0x00007f475652d5fd in _XEventsQueued (dpy=dpy@entry=0x1f2cce0, mode=mode@entry=2) at ../../src/xcb_io.c:363
  [Error: ../../src/xcb_io.c was not found in source tree]
#7  0x00007f475651f73d in XPending (dpy=0x1f2cce0) at ../../src/Pending.c:55
  [Error: ../../src/Pending.c was not found in source tree]
#8  0x00007f47577716c6 in gdk_check_xpending (display=0x1f38020) at /build/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:159
  [Error: /build/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c was not found in source tree]
#9  gdk_event_prepare (source=<optimized out>, timeout=<optimized out>) at /build/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c:2361
  [Error: /build/buildd/gtk+2.0-2.24.20/gdk/x11/gdkevents-x11.c was not found in source tree]
#10 0x00007f47591b7d5d in ?? ()
#11 0x00007fffc7dbdc28 in ?? ()
#12 0x00007fffc7dbdc40 in ?? ()
#13 0x00007fffc7dbdc24 in ?? ()
#14 0x00007fffc7dbdca8 in ?? ()
#15 0xffffffff01f41ae0 in ?? ()
#16 0x0000000001f419f0 in ?? ()
#17 0x0000000001f41ae0 in ?? ()
#18 0x00007f4700000001 in ?? ()
#19 0x0000000001e77940 in ?? ()
#20 0x0000000001f419f0 in ?? ()
#21 0x000000000249e4a0 in ?? ()
#22 0x0000000001f41ae0 in ?? ()
#23 0x00007f47584a9050 in PyGtkWarning () from /tmp/apport_sandbox_HyIdZc/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/_gtk.so
#24 0x0000000002514090 in ?? ()
#25 0x00007fffc7dbdcac in ?? ()
#26 0x0000000000000001 in ?? ()
#27 0x0000000000000003 in ?? ()
#28 0x00007f47591b85d3 in ?? ()
#29 0x0000000000000000 in ?? ()