GNU gdb (GDB) 7.4.1 Copyright (C) 2012 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu". For bug reporting instructions, please see: ... Reading symbols from /usr/bin/cheese...(no debugging symbols found)...done. (gdb) run Starting program: /usr/bin/cheese Traceback (most recent call last): File "/usr/share/gdb/auto-load/usr/lib/libgobject-2.0.so.0.3200.2-gdb.py", line 9, in from gobject import register File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in import gdb.backtrace ImportError: No module named backtrace [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/libthread_db.so.1". [New Thread 0x7fffe8ccc700 (LWP 7847)] [New Thread 0x7fffe3fff700 (LWP 7848)] (cheese:7844): Gtk-WARNING **: Attempting to add a widget with type GtkImage to a GtkToggleButton, but as a GtkBin subclass a GtkToggleButton can only contain one widget at a time; it already contains a widget of type GtkLabel (cheese:7844): Gtk-WARNING **: Attempting to add a widget with type GtkImage to a GtkToggleButton, but as a GtkBin subclass a GtkToggleButton can only contain one widget at a time; it already contains a widget of type GtkLabel (cheese:7844): Gtk-WARNING **: Attempting to add a widget with type GtkImage to a GtkToggleButton, but as a GtkBin subclass a GtkToggleButton can only contain one widget at a time; it already contains a widget of type GtkLabel (cheese:7844): Gtk-WARNING **: Attempting to add a widget with type GtkImage to a GtkButton, but as a GtkBin subclass a GtkButton can only contain one widget at a time; it already contains a widget of type GtkLabel (cheese:7844): Gtk-WARNING **: Attempting to add a widget with type GtkGrid to a GtkToggleButton, but as a GtkBin subclass a GtkToggleButton can only contain one widget at a time; it already contains a widget of type GtkLabel (cheese:7844): Gtk-WARNING **: Attempting to add a widget with type GtkImage to a GtkButton, but as a GtkBin subclass a GtkButton can only contain one widget at a time; it already contains a widget of type GtkLabel [New Thread 0x7fffdbde1700 (LWP 7849)] [New Thread 0x7fffd9130700 (LWP 7850)] [New Thread 0x7fffd18d4700 (LWP 8055)] [New Thread 0x7fffd10d3700 (LWP 8056)] [Thread 0x7fffd10d3700 (LWP 8056) exited] [Thread 0x7fffd18d4700 (LWP 8055) exited] [New Thread 0x7fffd18d4700 (LWP 8057)] [New Thread 0x7fffd10d3700 (LWP 8058)] ** (cheese:7844): WARNING **: Device '/dev/video0' is busy ** (cheese:7844): WARNING **: Could not negotiate format ** (cheese:7844): WARNING **: Device '/dev/video0' is busy ** (cheese:7844): WARNING **: Could not negotiate format [Thread 0x7fffd9130700 (LWP 7850) exited] [Thread 0x7fffd10d3700 (LWP 8058) exited] [Thread 0x7fffd18d4700 (LWP 8057) exited] Program received signal SIGSEGV, Segmentation fault. 0x00007ffff5033fe4 in free () from /lib/libc.so.6 (gdb) thread apply all bt Thread 4 (Thread 0x7fffdbde1700 (LWP 7849)): #0 0x00007ffff5363c61 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0 #1 0x00007ffff55f7825 in g_cond_wait_until () from /usr/lib/libglib-2.0.so.0 #2 0x00007ffff55922c1 in ?? () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff55de81a in ?? () from /usr/lib/libglib-2.0.so.0 #4 0x00007ffff55de115 in ?? () from /usr/lib/libglib-2.0.so.0 #5 0x00007ffff535fe0e in start_thread () from /lib/libpthread.so.0 #6 0x00007ffff509b1ed in clone () from /lib/libc.so.6 Thread 3 (Thread 0x7fffe3fff700 (LWP 7848)): #0 0x00007ffff509306f in poll () from /lib/libc.so.6 #1 0x00007ffff55bb784 in ?? () from /usr/lib/libglib-2.0.so.0 #2 0x00007ffff55bbbe2 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0 #3 0x00007fffe824cb1b in ?? () from /usr/lib/gio/modules/libdconfsettings.so #4 0x00007ffff55de115 in ?? () from /usr/lib/libglib-2.0.so.0 #5 0x00007ffff535fe0e in start_thread () from /lib/libpthread.so.0 #6 0x00007ffff509b1ed in clone () from /lib/libc.so.6 Thread 2 (Thread 0x7fffe8ccc700 (LWP 7847)): #0 0x00007ffff509306f in poll () from /lib/libc.so.6 #1 0x00007ffff55bb784 in ?? () from /usr/lib/libglib-2.0.so.0 ---Type to continue, or q to quit--- #2 0x00007ffff55bbbe2 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0 #3 0x00007ffff5da0ee6 in ?? () from /usr/lib/libgio-2.0.so.0 #4 0x00007ffff55de115 in ?? () from /usr/lib/libglib-2.0.so.0 #5 0x00007ffff535fe0e in start_thread () from /lib/libpthread.so.0 #6 0x00007ffff509b1ed in clone () from /lib/libc.so.6 Thread 1 (Thread 0x7ffff7fb1880 (LWP 7844)): #0 0x00007ffff5033fe4 in free () from /lib/libc.so.6 #1 0x00007fffd8722cf0 in ?? () from /usr/lib/gstreamer-0.10/libgstgeometrictransform.so #2 0x00007ffff4b7bf8f in ?? () from /usr/lib/libgstbase-0.10.so.0 #3 0x00007ffff4b7c067 in ?? () from /usr/lib/libgstbase-0.10.so.0 #4 0x00007ffff77332ab in gst_pad_activate_push () from /usr/lib/libgstreamer-0.10.so.0 #5 0x00007ffff7733f17 in gst_pad_set_active () from /usr/lib/libgstreamer-0.10.so.0 #6 0x00007ffff7713000 in ?? () from /usr/lib/libgstreamer-0.10.so.0 #7 0x00007ffff772572e in gst_iterator_fold () from /usr/lib/libgstreamer-0.10.so.0 #8 0x00007ffff7712f71 in ?? () from /usr/lib/libgstreamer-0.10.so.0 #9 0x00007ffff77155af in ?? () from /usr/lib/libgstreamer-0.10.so.0 #10 0x00007ffff77158dc in ?? () from /usr/lib/libgstreamer-0.10.so.0 #11 0x00007ffff771761c in gst_element_change_state () ---Type to continue, or q to quit--- from /usr/lib/libgstreamer-0.10.so.0 #12 0x00007ffff7717f72 in ?? () from /usr/lib/libgstreamer-0.10.so.0 #13 0x00007ffff7704cba in ?? () from /usr/lib/libgstreamer-0.10.so.0 #14 0x00007ffff771761c in gst_element_change_state () from /usr/lib/libgstreamer-0.10.so.0 #15 0x00007ffff7717f72 in ?? () from /usr/lib/libgstreamer-0.10.so.0 #16 0x00007ffff7704cba in ?? () from /usr/lib/libgstreamer-0.10.so.0 #17 0x00007ffff771761c in gst_element_change_state () from /usr/lib/libgstreamer-0.10.so.0 #18 0x00007ffff7717f72 in ?? () from /usr/lib/libgstreamer-0.10.so.0 #19 0x00007ffff7704cba in ?? () from /usr/lib/libgstreamer-0.10.so.0 #20 0x00007ffff7737a34 in ?? () from /usr/lib/libgstreamer-0.10.so.0 #21 0x00007fffe155ee23 in ?? () from /usr/lib/gstreamer-0.10/libgstcamerabin.so #22 0x00007ffff771761c in gst_element_change_state () from /usr/lib/libgstreamer-0.10.so.0 #23 0x00007ffff7717f72 in ?? () from /usr/lib/libgstreamer-0.10.so.0 #24 0x00007ffff7bd1a37 in cheese_camera_stop () from /usr/lib/libcheese.so.3 #25 0x00007ffff7bd2184 in cheese_camera_stop_video_recording () from /usr/lib/libcheese.so.3 #26 0x00000000004134ae in cheese_main_window_toggle_video_recording () #27 0x00007ffff5877eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0 #28 0x00007ffff5888f40 in ?? () from /usr/lib/libgobject-2.0.so.0 #29 0x00007ffff5890ebc in g_signal_emit_valist () ---Type to continue, or q to quit--- from /usr/lib/libgobject-2.0.so.0 #30 0x00007ffff5891052 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0 #31 0x00007ffff6336cc3 in ?? () from /usr/lib/libgtk-3.so.0 #32 0x00007ffff5878193 in ?? () from /usr/lib/libgobject-2.0.so.0 #33 0x00007ffff5890806 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0 #34 0x00007ffff5891052 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0 #35 0x00007ffff635c9d8 in ?? () from /usr/lib/libgtk-3.so.0 #36 0x00007ffff5877eb4 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0 #37 0x00007ffff5888863 in ?? () from /usr/lib/libgobject-2.0.so.0 #38 0x00007ffff5890ebc in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0 #39 0x00007ffff5891052 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0 #40 0x00007ffff635acf3 in ?? () from /usr/lib/libgtk-3.so.0 #41 0x00007ffff641b8ff in ?? () from /usr/lib/libgtk-3.so.0 #42 0x00007ffff5878193 in ?? () from /usr/lib/libgobject-2.0.so.0 #43 0x00007ffff5890806 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0 #44 0x00007ffff5891052 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0 #45 0x00007ffff654397e in ?? () from /usr/lib/libgtk-3.so.0 #46 0x00007ffff64198c5 in ?? () from /usr/lib/libgtk-3.so.0 #47 0x00007ffff641b4d3 in gtk_main_do_event () from /usr/lib/libgtk-3.so.0 #48 0x00007ffff606ce42 in ?? () from /usr/lib/libgdk-3.so.0 ---Type to continue, or q to quit--- #49 0x00007ffff55bb4b5 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0 #50 0x00007ffff55bb7e8 in ?? () from /usr/lib/libglib-2.0.so.0 #51 0x00007ffff55bb8a4 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0 #52 0x00007ffff5d6fa7c in g_application_run () from /usr/lib/libgio-2.0.so.0 #53 0x0000000000417798 in _vala_main () #54 0x00007ffff4fd8455 in __libc_start_main () from /lib/libc.so.6 #55 0x000000000040c791 in _start () (gdb)