#0  0x00007fdb79ffdac3 in _cairo_mempool_free () from /tmp/apport_sandbox_2F0Bhw/usr/lib/x86_64-linux-gnu/libcairo.so.2
#1  0x00007fdb7a05e1ff in _cairo_xlib_shm_surface_finish () from /tmp/apport_sandbox_2F0Bhw/usr/lib/x86_64-linux-gnu/libcairo.so.2
#2  0x00007fdb7a02bca6 in _cairo_surface_finish () from /tmp/apport_sandbox_2F0Bhw/usr/lib/x86_64-linux-gnu/libcairo.so.2
#3  0x00007fdb7a02c640 in cairo_surface_destroy () from /tmp/apport_sandbox_2F0Bhw/usr/lib/x86_64-linux-gnu/libcairo.so.2
#4  0x00007fdb7a786cef in check_invalidate_surface (self=self@entry=0x55eb0802bb00, context=0x55eb0803c2c0) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkiconhelper.c:545
  [Error: gtkiconhelper.c was not found in source tree]
#5  0x00007fdb7a7877c5 in ensure_surface_for_gicon (context=0x55eb0803c2c0, self=0x55eb0802bb00) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkiconhelper.c:741
  [Error: gtkiconhelper.c was not found in source tree]
#6  _gtk_icon_helper_ensure_surface (self=0x55eb0802bb00, context=context@entry=0x55eb0803c2c0) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkiconhelper.c:803
  [Error: gtkiconhelper.c was not found in source tree]
#7  0x00007fdb7a7880ee in _gtk_icon_helper_draw (self=<optimized out>, context=0x55eb0803c2c0, cr=0x55eb07f4a000, x=1, y=1) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkiconhelper.c:1130
  [Error: gtkiconhelper.c was not found in source tree]
#8  0x00007fdb7a74055c in draw_icon (icon_pos=GTK_ENTRY_ICON_PRIMARY, cr=0x55eb07f4a000, widget=0x55eb08040220) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkentry.c:3746
  [Error: gtkentry.c was not found in source tree]
#9  gtk_entry_draw (widget=0x55eb08040220, cr=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkentry.c:3956
  [Error: gtkentry.c was not found in source tree]
#10 0x00007fdb7a90a937 in _gtk_widget_draw_internal (widget=widget@entry=0x55eb08040220, cr=cr@entry=0x55eb07f4a000, clip_to_size=clip_to_size@entry=1, window=window@entry=0x55eb07ad0730) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6831
  [Error: gtkwidget.c was not found in source tree]
#11 0x00007fdb7a90af43 in _gtk_widget_draw_internal (window=0x55eb07ad0730, clip_to_size=1, cr=0x55eb07f4a000, widget=0x55eb08040220) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:7007
  [Error: gtkwidget.c was not found in source tree]
#12 _gtk_widget_draw (widget=widget@entry=0x55eb08040220, cr=cr@entry=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:7013
  [Error: gtkwidget.c was not found in source tree]
#13 0x00007fdb7a70225b in gtk_container_propagate_draw_internal (container=container@entry=0x55eb08028910, child=0x55eb08040220, cr=cr@entry=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkcontainer.c:3797
  [Error: gtkcontainer.c was not found in source tree]
#14 0x00007fdb7a706962 in gtk_container_draw (widget=0x55eb08028910, cr=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkcontainer.c:3666
  [Error: gtkcontainer.c was not found in source tree]
#15 0x00007fdb7a6c2492 in gtk_box_draw (widget=0x55eb08028910, cr=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkbox.c:451
  [Error: gtkbox.c was not found in source tree]
#16 0x00007fdb7a90a937 in _gtk_widget_draw_internal (widget=widget@entry=0x55eb08028910, cr=cr@entry=0x55eb07f4a000, clip_to_size=clip_to_size@entry=1, window=window@entry=0x55eb07ad0730) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6831
  [Error: gtkwidget.c was not found in source tree]
#17 0x00007fdb7a90af43 in _gtk_widget_draw_internal (window=0x55eb07ad0730, clip_to_size=1, cr=0x55eb07f4a000, widget=0x55eb08028910) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:7007
  [Error: gtkwidget.c was not found in source tree]
#18 _gtk_widget_draw (widget=widget@entry=0x55eb08028910, cr=cr@entry=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:7013
  [Error: gtkwidget.c was not found in source tree]
#19 0x00007fdb7a70225b in gtk_container_propagate_draw_internal (container=<optimized out>, child=0x55eb08028910, cr=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkcontainer.c:3797
  [Error: gtkcontainer.c was not found in source tree]
#20 0x00007fdb7a81b6f8 in gtk_popover_draw (widget=0x55eb07e217f0, cr=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkpopover.c:1136
  [Error: gtkpopover.c was not found in source tree]
#21 0x00007fdb7a90a937 in _gtk_widget_draw_internal (widget=0x55eb07e217f0, cr=cr@entry=0x55eb07f4a000, clip_to_size=clip_to_size@entry=1, window=window@entry=0x55eb07ad0730) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6831
  [Error: gtkwidget.c was not found in source tree]
#22 0x00007fdb7a90ad37 in _gtk_widget_draw_internal (window=0x55eb07ad0730, clip_to_size=1, cr=0x55eb07f4a000, widget=<optimized out>) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6927
  [Error: gtkwidget.c was not found in source tree]
#23 _gtk_widget_draw_windows (window=window@entry=0x55eb07ad0730, cr=cr@entry=0x55eb07f4a000, window_x=window_x@entry=0, window_y=window_y@entry=0) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6933
  [Error: gtkwidget.c was not found in source tree]
#24 0x00007fdb7a90af22 in _gtk_widget_draw (widget=widget@entry=0x55eb07e217f0, cr=cr@entry=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:7007
  [Error: gtkwidget.c was not found in source tree]
#25 0x00007fdb7a70225b in gtk_container_propagate_draw_internal (container=container@entry=0x55eb07fb24b0, child=0x55eb07e217f0, cr=cr@entry=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkcontainer.c:3797
  [Error: gtkcontainer.c was not found in source tree]
#26 0x00007fdb7a706962 in gtk_container_draw (widget=0x55eb07fb24b0, cr=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkcontainer.c:3666
  [Error: gtkcontainer.c was not found in source tree]
#27 0x00007fdb7a915859 in gtk_window_draw (widget=0x55eb07fb24b0, cr=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwindow.c:10017
  [Error: gtkwindow.c was not found in source tree]
#28 0x000055eb06351d0c in ?? ()
#29 0x00007fdb7a90a937 in _gtk_widget_draw_internal (widget=0x55eb07fb24b0, cr=cr@entry=0x55eb07f4a000, clip_to_size=clip_to_size@entry=1, window=window@entry=0x55eb08013170) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6831
  [Error: gtkwidget.c was not found in source tree]
#30 0x00007fdb7a90ad37 in _gtk_widget_draw_internal (window=0x55eb08013170, clip_to_size=1, cr=0x55eb07f4a000, widget=<optimized out>) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6927
  [Error: gtkwidget.c was not found in source tree]
#31 _gtk_widget_draw_windows (window=window@entry=0x55eb08013170, cr=cr@entry=0x55eb07f4a000, window_x=<optimized out>, window_y=25) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6933
  [Error: gtkwidget.c was not found in source tree]
#32 0x00007fdb7a90acf0 in _gtk_widget_draw_windows (window=window@entry=0x55eb08013450, cr=cr@entry=0x55eb07f4a000, window_x=window_x@entry=0, window_y=window_y@entry=0) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:6958
  [Error: gtkwidget.c was not found in source tree]
#33 0x00007fdb7a90af22 in _gtk_widget_draw (widget=widget@entry=0x55eb07fb24b0, cr=cr@entry=0x55eb07f4a000) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:7007
  [Error: gtkwidget.c was not found in source tree]
#34 0x00007fdb7a90b16b in gtk_widget_send_expose (widget=widget@entry=0x55eb07fb24b0, event=event@entry=0x7ffc75a7b530) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkwidget.c:7514
  [Error: gtkwidget.c was not found in source tree]
#35 0x00007fdb7a7bf052 in gtk_main_do_event (event=0x7ffc75a7b530) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkmain.c:1770
  [Error: gtkmain.c was not found in source tree]
#36 0x00007fdb7a30fc88 in _gdk_window_process_updates_recurse_helper (window=0x55eb08013450, expose_region=<optimized out>) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gdk/gdkwindow.c:3589
  [Error: gdkwindow.c was not found in source tree]
#37 0x00007fdb7a310dac in gdk_window_process_updates_internal (window=0x55eb08013450) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gdk/gdkwindow.c:3734
  [Error: gdkwindow.c was not found in source tree]
#38 0x00007fdb7a310f63 in gdk_window_process_updates_with_mode (window=<optimized out>, recurse_mode=<optimized out>) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gdk/gdkwindow.c:3935
  [Error: gdkwindow.c was not found in source tree]
#39 0x00007fdb792a21d4 in _g_closure_invoke_va () from /tmp/apport_sandbox_2F0Bhw/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#40 0x00007fdb792bc9a6 in g_signal_emit_valist () from /tmp/apport_sandbox_2F0Bhw/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#41 0x00007fdb792bd555 in g_signal_emit_by_name () from /tmp/apport_sandbox_2F0Bhw/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#42 0x00007fdb7a309f47 in gdk_frame_clock_paint_idle (data=0x55eb07a20c00) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gdk/gdkframeclockidle.c:430
  [Error: gdkframeclockidle.c was not found in source tree]
#43 0x00007fdb7a2f9348 in gdk_threads_dispatch (data=0x55eb07ca2380) at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gdk/gdk.c:719
  [Error: gdk.c was not found in source tree]
#44 0x00007fdb78fcbb43 in g_timeout_dispatch () from /tmp/apport_sandbox_2F0Bhw/lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007fdb78fcb0da in g_main_context_dispatch () from /tmp/apport_sandbox_2F0Bhw/lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007fdb78fcb480 in g_main_context_iterate.isra () from /tmp/apport_sandbox_2F0Bhw/lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007fdb78fcb7a2 in g_main_loop_run () from /tmp/apport_sandbox_2F0Bhw/lib/x86_64-linux-gnu/libglib-2.0.so.0
#48 0x00007fdb7a7be395 in gtk_main () at /build/gtk+3.0-hEt8eK/gtk+3.0-3.18.9/./gtk/gtkmain.c:1241
  [Error: gtkmain.c was not found in source tree]
#49 0x000055eb0634b473 in _vala_main ()
#50 0x00007fdb7848c7e0 in __libc_start_main (main=0x55eb0634b140 <main>, argc=1, argv=0x7ffc75a7bca8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc75a7bc98) at ../csu/libc-start.c:291
  [Error: libc-start.c was not found in source tree]
#51 0x000055eb0634b209 in _start ()