.
Thread 4 (Thread 0x7f2e72f58700 (LWP 2241)):
#0  0x00007f2e7bbc6d93 in poll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007f2e7c615136 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f2e7c61559a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f2e7cbe1446 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f2e7c6367d5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f2e7bea4e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007f2e7bbd274d 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 3 (Thread 0x7f2e5c1ee700 (LWP 2424)):
#0  0x00007f2e7bea90fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#1  0x00007f2e7c650785 in g_cond_wait_until () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f2e7c5eb271 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f2e7c5eb959 in g_async_queue_timed_pop () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x00007f2e5c1f5407 in ?? () from /usr/lib/nautilus/extensions-3.0/libnautilus-dropbox.so
No symbol table info available.
#5  0x00007f2e7c6367d5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#6  0x00007f2e7bea4e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#7  0x00007f2e7bbd274d in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#8  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7f2e7154d700 (LWP 2251)):
#0  0x00007f2e7bbc6d93 in poll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x00007f2e7c615136 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f2e7c61559a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f2e7155275b in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
No symbol table info available.
#4  0x00007f2e7c6367d5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f2e7bea4e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#6  0x00007f2e7bbd274d 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 0x7f2e80012980 (LWP 2153)):
#0  0x00007f2e7c8f0740 in g_type_check_instance_is_a () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#1  0x00007f2e7de5a866 in gdk_window_get_screen () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#2  0x00007f2e7de4e5d2 in gdk_device_get_position () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#3  0x00007f2e7e2506c9 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#4  0x00007f2e7e257aa8 in gtk_menu_popup_for_device () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#5  0x00007f2e7e2580cb in gtk_menu_popup () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#6  0x00000000004f8991 in ?? ()
No symbol table info available.
#7  0x00007f2e7c8d03c4 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#8  0x00007f2e7c8e05f5 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#9  0x00007f2e7c8e7fcb in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#10 0x00007f2e7c8e8192 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#11 0x00000000004cc222 in ?? ()
No symbol table info available.
#12 0x00007f2e7e24a893 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#13 0x00007f2e7c8d03c4 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#14 0x00007f2e7c8e0bda in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#15 0x00007f2e7c8e7ead in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#16 0x00007f2e7c8e8192 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#17 0x00007f2e7e386199 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#18 0x00007f2e7e24a06a in gtk_propagate_event () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#19 0x00007f2e7e24a48b in gtk_main_do_event () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#20 0x00007f2e7de7c792 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0
No symbol table info available.
#21 0x00007f2e7c614dda in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#22 0x00007f2e7c6151a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#23 0x00007f2e7c615264 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#24 0x00007f2e7cbad894 in g_application_run () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#25 0x000000000042b779 in ?? ()
No symbol table info available.
#26 0x00007f2e7bb0376d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#27 0x000000000042b7c5 in ?? ()
No symbol table info available.
#28 0x00007fffd09c3db8 in ?? ()
No symbol table info available.
#29 0x000000000000001c in ?? ()
No symbol table info available.
#30 0x0000000000000002 in ?? ()
No symbol table info available.
#31 0x00007fffd09c5aa9 in ?? ()
No symbol table info available.
#32 0x00007fffd09c5ab2 in ?? ()
No symbol table info available.
#33 0x0000000000000000 in ?? ()
No symbol table info available.