.
Thread 3 (Thread 0x7fea9e6e1700 (LWP 2670)):
#0  0x00007feaa6184b03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007feaa66a9036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007feaa66a949a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007fea9e6e698b in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
No symbol table info available.
#4  0x00007feaa66ca9e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007feaa3537e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007feaa61904bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7fea9dcce700 (LWP 2671)):
#0  0x00007feaa6184b03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007feaa66a9036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007feaa66a949a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007feaa714c406 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007feaa66ca9e5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007feaa3537e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007feaa61904bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7feaa8fa9980 (LWP 2667)):
#0  0x00007feaa8b6ae67 in meta_window_move_frame () from /usr/lib/libmutter.so.0
No symbol table info available.
#1  0x0000000000409faf in ?? ()
No symbol table info available.
#2  0x00007feaa8b32a28 in meta_plugin_manager_event_simple () from /usr/lib/libmutter.so.0
No symbol table info available.
#3  0x00007feaa8b3706f in ?? () from /usr/lib/libmutter.so.0
No symbol table info available.
#4  0x00007feaa8b37f13 in meta_window_actor_show () from /usr/lib/libmutter.so.0
No symbol table info available.
#5  0x00007feaa8b69e6f in ?? () from /usr/lib/libmutter.so.0
No symbol table info available.
#6  0x00007feaa8b6ac79 in ?? () from /usr/lib/libmutter.so.0
No symbol table info available.
#7  0x00007feaa8b5f318 in ?? () from /usr/lib/libmutter.so.0
No symbol table info available.
#8  0x00007feaa840078c in ?? () from /usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
No symbol table info available.
#9  0x00007feaa8402682 in ?? () from /usr/lib/x86_64-linux-gnu/libclutter-1.0.so.0
No symbol table info available.
#10 0x00007feaa66a8d53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#11 0x00007feaa66a90a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#12 0x00007feaa66a949a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#13 0x00007feaa8b504b1 in meta_run () from /usr/lib/libmutter.so.0
No symbol table info available.
#14 0x000000000040e0e2 in gala_main ()
No symbol table info available.
#15 0x000000000040e11d in main ()
No symbol table info available.