StacktraceTop: gtk_widget_pop_verify_invariants (widget=0x1033130) at /build/buildd/gtk+3.0-3.3.18/./gtk/gtkwidget.c:8713 gtk_widget_real_unrealize (widget=0xf2c7e0) at /build/buildd/gtk+3.0-3.3.18/./gtk/gtkwidget.c:10512 _g_closure_invoke_va (closure=0xef6470, return_value=0x0, instance=0xf2c7e0, args=0x7fff67cc9a78, n_params=0, param_types=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gclosure.c:840 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=0, var_args=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3206 g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.31.20/./gobject/gsignal.c:3352
StacktraceTop: pop_verify_ invariants (widget=0x1033130) at /build/ buildd/ gtk+3.0- 3.3.18/ ./gtk/gtkwidget .c:8713 real_unrealize (widget=0xf2c7e0) at /build/ buildd/ gtk+3.0- 3.3.18/ ./gtk/gtkwidget .c:10512 invoke_ va (closure=0xef6470, return_value=0x0, instance=0xf2c7e0, args=0x7fff67cc 9a78, n_params=0, param_types= <optimized out>) at /build/ buildd/ glib2.0- 2.31.20/ ./gobject/ gclosure. c:840 emit_valist (instance= <optimized out>, signal_ id=<optimized out>, detail=0, var_args=<optimized out>) at /build/ buildd/ glib2.0- 2.31.20/ ./gobject/ gsignal. c:3206 <optimized out>, signal_ id=<optimized out>, detail=<optimized out>) at /build/ buildd/ glib2.0- 2.31.20/ ./gobject/ gsignal. c:3352
gtk_widget_
gtk_widget_
_g_closure_
g_signal_
g_signal_emit (instance=