#0  WTF::waitForThreadCompletion (threadID=2) at ../Source/WTF/wtf/ThreadingPthreads.cpp:244
  [Error: ../Source/WTF/wtf/ThreadingPthreads.cpp was not found in source tree]
#1  0x00007f6415ef3f9e in WebCore::IconDatabase::close (this=0x7f641734d000) at ../Source/WebCore/loader/icon/IconDatabase.cpp:166
  [Error: ../Source/WebCore/loader/icon/IconDatabase.cpp was not found in source tree]
#2  0x00007f6415ef37ca in WebCore::IconDatabase::setEnabled (this=0x7f641734d000, enabled=<optimized out>) at ../Source/WebCore/loader/icon/IconDatabase.cpp:719
  [Error: ../Source/WebCore/loader/icon/IconDatabase.cpp was not found in source tree]
#3  0x00007f641590f1c0 in webkitFaviconDatabaseClose (database=<optimized out>) at ../Source/WebKit/gtk/webkit/webkitfavicondatabase.cpp:324
  [Error: ../Source/WebKit/gtk/webkit/webkitfavicondatabase.cpp was not found in source tree]
#4  webkitFaviconDatabaseClose (database=0x98a0a0) at ../Source/WebKit/gtk/webkit/webkitfavicondatabase.cpp:321
  [Error: ../Source/WebKit/gtk/webkit/webkitfavicondatabase.cpp was not found in source tree]
#5  0x00007f641590fc81 in webkit_favicon_database_finalize (object=0x98a0a0) at ../Source/WebKit/gtk/webkit/webkitfavicondatabase.cpp:204
  [Error: ../Source/WebKit/gtk/webkit/webkitfavicondatabase.cpp was not found in source tree]
#6  0x00007f64143917d8 in g_object_unref (_object=0x98a0a0) at /build/buildd/glib2.0-2.35.8/./gobject/gobject.c:3024
  [Error: /build/buildd/glib2.0-2.35.8/./gobject/gobject.c was not found in source tree]
#7  0x00007f641591355e in webkitExit () at ../Source/WebKit/gtk/webkit/webkitglobals.cpp:284
  [Error: ../Source/WebKit/gtk/webkit/webkitglobals.cpp was not found in source tree]
#8  0x00007f6413ad7121 in __run_exit_handlers (status=0, listp=0x7f6413e5c6a8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true) at exit.c:77
  [Error: exit.c was not found in source tree]
#9  0x00007f6413ad71a5 in __GI_exit (status=<optimized out>) at exit.c:99
  [Error: exit.c was not found in source tree]
#10 0x0000000000403a7b in sigterm_cb (signum=<optimized out>) at lightdm-webkit-greeter.c:1021
  1016: }
  1017: 
  1018: static void
  1019: sigterm_cb (int signum)
  1020: {
  1021:     exit (0);
  1022: }
  1023: 
  1024: int
  1025: main (int argc, char **argv)
  1026: {
#11 <signal handler called>
#12 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:133
  [Error: ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S was not found in source tree]
#13 0x00007f6413e6d197 in _L_lock_1035 () from /tmp/apport_sandbox_8XXT5n/lib/x86_64-linux-gnu/libpthread.so.0
#14 0x00007f6413e6d029 in __GI___pthread_mutex_lock (mutex=0x937590) at pthread_mutex_lock.c:85
  [Error: pthread_mutex_lock.c was not found in source tree]
#15 0x00007f6413795277 in _g_io_module_get_default (extension_point=extension_point@entry=0x7f641383cbfb "gio-vfs", envvar=envvar@entry=0x7f6413845262 "GIO_USE_VFS", verify_func=verify_func@entry=0x7f64137c3140 <g_vfs_is_active>) at /build/buildd/glib2.0-2.35.8/./gio/giomodule.c:809
  [Error: /build/buildd/glib2.0-2.35.8/./gio/giomodule.c was not found in source tree]
#16 0x00007f64137c359e in g_vfs_get_default () at /build/buildd/glib2.0-2.35.8/./gio/gvfs.c:199
  [Error: /build/buildd/glib2.0-2.35.8/./gio/gvfs.c was not found in source tree]
#17 0x00007f641378098e in g_file_new_for_path (path=0x98fca0 "/home/kman/.config/ibus/bus/891682dd44a7c563fb54c75e50aaacb0-unix-1") at /build/buildd/glib2.0-2.35.8/./gio/gfile.c:6016
  [Error: /build/buildd/glib2.0-2.35.8/./gio/gfile.c was not found in source tree]
#18 0x00007f63b688ed6a in ?? ()
#19 0x0000000000000811 in ?? ()
#20 0x0000000000201175 in ?? ()
#21 0x0000000000000002 in ?? ()
#22 0x000003e8000041c0 in ?? ()
#23 0x00000000000003e8 in ?? ()
#24 0x0000000000000000 in ?? ()