.
Thread 2 (Thread 4505):
#0  0x00007f3b3350a203 in poll () from /lib/libc.so.6
No symbol table info available.
#1  0x00007f3b33d118e0 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f3b33d121ba in g_main_loop_run () from /lib/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f3b35d9da34 in ?? () from /usr/lib/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f3b33d38bc4 in ?? () from /lib/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f3b36d88971 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#6  0x00007f3b3351694d in clone () from /lib/libc.so.6
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 4504):
#0  0x00007f3b3a12d146 in gexiv2_metadata_get_exif_tag_string () from /usr/lib/libgexiv2.so.0
No symbol table info available.
#1  0x00000000005aaaf4 in photo_metadata_get_string ()
No symbol table info available.
#2  0x00000000005ade94 in photo_metadata_get_date_time ()
No symbol table info available.
#3  0x00000000005ae00c in photo_metadata_get_first_date_time ()
No symbol table info available.
#4  0x00000000004c2492 in transformable_photo_prepare_for_import ()
No symbol table info available.
#5  0x00000000004d33f5 in direct_photo_internal_import ()
No symbol table info available.
#6  0x00000000004d3760 in direct_photo_source_collection_fetch ()
No symbol table info available.
#7  0x000000000049aab8 in ?? ()
No symbol table info available.
#8  0x00007f3b345d899e in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#9  0x00007f3b345ea75e in ?? () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#10 0x00007f3b345f43b6 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#11 0x00007f3b345f4573 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#12 0x00007f3b36782bc9 in gtk_widget_realize () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#13 0x00007f3b367832e8 in gtk_widget_map () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#14 0x00007f3b36579fe3 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#15 0x00007f3b365b5aef in ?? () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#16 0x00007f3b345d88e9 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#17 0x00007f3b345ea75e in ?? () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#18 0x00007f3b345f43b6 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#19 0x00007f3b345f4573 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#20 0x00007f3b367832be in gtk_widget_map () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#21 0x00007f3b3679583a in ?? () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#22 0x00007f3b345d899e in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#23 0x00007f3b345ea75e in ?? () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#24 0x00007f3b345f43b6 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#25 0x00007f3b345f4573 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#26 0x00007f3b367832be in gtk_widget_map () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#27 0x00007f3b3678e755 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#28 0x00007f3b345d899e in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#29 0x00007f3b345ea75e in ?? () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#30 0x00007f3b345f43b6 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#31 0x00007f3b345f4573 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#32 0x00007f3b36783db6 in gtk_widget_show () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#33 0x00000000004556a1 in editing_exec ()
No symbol table info available.
#34 0x00000000004564fa in _vala_main ()
No symbol table info available.
#35 0x00000000004565f9 in main ()
No symbol table info available.