#0  0x00007fdfc23a65bc in __GI___libc_free (mem=0x7fdfc4fdbcf5) at malloc.c:2982
  [Error: malloc.c was not found in source tree]
#1  0x000000000040fea1 in cheese_main_window_update_timeout_layer (self=<optimized out>) at src/cheese-window.c:2757
  [Error: src/cheese-window.c was not found in source tree]
#2  _cheese_main_window_update_timeout_layer_gsource_func (self=<error reading variable: value has been optimized out>) at src/cheese-window.c:2655
  [Error: src/cheese-window.c was not found in source tree]
#3  0x00007fdfc294763b in g_timeout_dispatch (source=source@entry=0x2d96d60, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:4026
  [Error: /build/buildd/glib2.0-2.34.0/./glib/gmain.c was not found in source tree]
#4  0x00007fdfc2946ab5 in g_main_dispatch (context=0x1b62ad0) at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:2715
  [Error: /build/buildd/glib2.0-2.34.0/./glib/gmain.c was not found in source tree]
#5  g_main_context_dispatch (context=context@entry=0x1b62ad0) at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3219
  [Error: /build/buildd/glib2.0-2.34.0/./glib/gmain.c was not found in source tree]
#6  0x00007fdfc2946de8 in g_main_context_iterate (context=context@entry=0x1b62ad0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3290
  [Error: /build/buildd/glib2.0-2.34.0/./glib/gmain.c was not found in source tree]
#7  0x00007fdfc2946ea4 in g_main_context_iteration (context=0x1b62ad0, context@entry=0x0, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.34.0/./glib/gmain.c:3351
  [Error: /build/buildd/glib2.0-2.34.0/./glib/gmain.c was not found in source tree]
#8  0x00007fdfc30fe69c in g_application_run (application=application@entry=0x22cc0c0, argc=<optimized out>, argv=0x7fff5a152e38) at /build/buildd/glib2.0-2.34.0/./gio/gapplication.c:1620
  [Error: /build/buildd/glib2.0-2.34.0/./gio/gapplication.c was not found in source tree]
#9  0x0000000000417e68 in _vala_main (args=0x7fff5a152e38, args_length1=1) at src/cheese-main.c:1355
  [Error: src/cheese-main.c was not found in source tree]
#10 0x00007fdfc234476d in __libc_start_main (main=0x40c940 <main>, argc=1, ubp_av=0x7fff5a152e38, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff5a152e28) at libc-start.c:226
  [Error: libc-start.c was not found in source tree]
#11 0x000000000040c991 in _start ()
