#0  0x00007f42ab38418b in raise () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f42ab363859 in abort () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libc.so.6
#2  0x00007f42ab60fb4f in _g_log_abort.cold () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#3  0x00007f42ab64b3b9 in g_logv () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#4  0x00007f42ab64b583 in g_log () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#5  0x00007f42ab5838df in plank_abstract_main_sig_handler (sig=<optimized out>) at Factories/AbstractMain.c:454
  [Error: AbstractMain.c was not found in source tree]
#6  _plank_abstract_main_sig_handler_sighandler_t (signal=<optimized out>) at Factories/AbstractMain.c:2202
  [Error: AbstractMain.c was not found in source tree]
#7  <signal handler called>
#8  0x00007f42ab1dd5e9 in ?? () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libpcre.so.3
#9  0x00007f42ab1ebeb4 in ?? () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libpcre.so.3
#10 0x00007f42ab1e00cc in ?? () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libpcre.so.3
#11 0x00007f42ab1eb6bf in ?? () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libpcre.so.3
#12 0x00007f42ab1ef849 in pcre_exec () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libpcre.so.3
#13 0x00007f42ab657e0c in g_match_info_next () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#14 0x00007f42ab65974f in g_regex_match_full () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#15 0x00007f42ab6598ae in g_regex_match () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#16 0x00007f42ab59ebca in plank_logger_format_message (msg=0x55ce50572400 "Failed to fetch xid: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface \342\200\234org.ayatana.bamf.window\342\200\235 on object at path /org/ayatana/bamf/window/54525955") at Services/Logger.c:232
  [Error: Logger.c was not found in source tree]
#17 0x00007f42ab59f166 in plank_logger_glib_log_func (d=<optimized out>, flags=<optimized out>, msg=<optimized out>) at Services/Logger.c:635
  [Error: Logger.c was not found in source tree]
#18 0x00007f42ab64b39c in g_logv () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#19 0x00007f42ab64b583 in g_log () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#20 0x00007f42aad84099 in bamf_window_get_xid (self=0x55ce5041a880) at bamf-window.c:215
  [Error: bamf-window.c was not found in source tree]
#21 0x00007f42aad8525b in _bamf_factory_view_for_path_type (factory=0x55ce50850e40, path=path@entry=0x55ce504c3ea0 "/org/ayatana/bamf/window/54525955", type=<optimized out>) at bamf-factory.c:457
  [Error: bamf-factory.c was not found in source tree]
#22 0x00007f42aad8551c in _bamf_factory_view_for_path_type_str (factory=<optimized out>, path=path@entry=0x55ce504c3ea0 "/org/ayatana/bamf/window/54525955", type=type@entry=0x55ce50467d80 "window") at bamf-factory.c:321
  [Error: bamf-factory.c was not found in source tree]
#23 0x00007f42aad7f6d0 in bamf_matcher_on_view_closed (proxy=<optimized out>, path=0x55ce504c3ea0 "/org/ayatana/bamf/window/54525955", type=0x55ce50467d80 "window", matcher=0x55ce505e8a60) at bamf-matcher.c:204
  [Error: bamf-matcher.c was not found in source tree]
#24 0x00007f42ab242ff5 in ffi_call_unix64 () at ../src/x86/unix64.S:101
  [Error: unix64.S was not found in source tree]
#25 0x00007f42ab24240a in ffi_call_int (cif=<optimized out>, fn=<optimized out>, rvalue=<optimized out>, avalue=<optimized out>, closure=<optimized out>) at ../src/x86/ffi64.c:669
  [Error: ffi64.c was not found in source tree]
#26 0x00007f42ab73030d in g_cclosure_marshal_generic () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#27 0x00007f42ab72f802 in g_closure_invoke () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#28 0x00007f42ab743814 in signal_emit_unlocked_R () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#29 0x00007f42ab74da37 in g_signal_emitv () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#30 0x00007f42aad882cd in _bamf_dbus_matcher_proxy_g_signal (proxy=<optimized out>, sender_name=<optimized out>, signal_name=<optimized out>, parameters=<optimized out>) at bamf-gdbus-generated.c:4732
  [Error: bamf-gdbus-generated.c was not found in source tree]
#31 0x00007f42ab72f802 in g_closure_invoke () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#32 0x00007f42ab742f96 in signal_emit_unlocked_R () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#33 0x00007f42ab74eb9e in g_signal_emit_valist () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#34 0x00007f42ab74f0d3 in g_signal_emit () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.6400.0
#35 0x00007f42ab896ce0 in on_signal_received (connection=<optimized out>, sender_name=0x7f429c0099f0 ":1.71", object_path=<optimized out>, interface_name=<optimized out>, signal_name=0x7f429c01a380 "ViewClosed", parameters=0x7f429c018950, user_data=0x55ce50667180) at ../../../gio/gdbusproxy.c:884
  [Error: gdbusproxy.c was not found in source tree]
#36 0x00007f42ab8847df in emit_signal_instance_in_idle_cb (data=0x7f429c019f70) at ../../../gio/gdbusconnection.c:3777
  [Error: gdbusconnection.c was not found in source tree]
#37 0x00007f42ab643e8e in g_main_context_dispatch () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#38 0x00007f42ab644240 in g_main_context_iterate.isra () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#39 0x00007f42ab6442e3 in g_main_context_iteration () from /tmp/apport_sandbox_sxg1e8r0/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.0
#40 0x00007f42ab85dec5 in g_application_run (application=0x55ce5039a2a0, argc=<optimized out>, argv=<optimized out>) at ../../../gio/gapplication.c:2559
  [Error: gapplication.c was not found in source tree]
#41 0x000055ce4e599746 in plank_main ()
#42 0x00007f42ab3650b3 in __libc_start_main () from /tmp/apport_sandbox_sxg1e8r0/lib/x86_64-linux-gnu/libc.so.6
#43 0x000055ce4e5992ce in _start ()