Forwarding https://bugs.debian.org/833867

Package: libgl1-mesa-dri
Version: 11.2.2-1
Severity: normal

I got a crash (SIGSEGV) in mesa when totem (GNOME video player) was
exiting. The Debian GNOME team advised me to file this against mesa.
The Debian X Strike Force advised me to forward this bug upstream.
Full backtrace attached and further information in the downstream bug.
If the backtrace below isn't useful, please close this bug.

#0  0x00007fd93badba20 in unsafe_free (info=0x55d85338ad50) at ../../../src/util/ralloc.c:247
#1  0x00007fd93badbcb1 in ralloc_free (ptr=<optimized out>) at ../../../src/util/ralloc.c:218
#2  0x00007fd93ba9dc1c in _mesa_glsl_release_builtin_functions() (this=0x7fd93c070cc0 <builtins>, this=0x7fd93c070cc0 <builtins>) at ../../../src/compiler/glsl/builtin_functions.cpp:899
#3  0x00007fd93ba9dc1c in _mesa_glsl_release_builtin_functions() () at ../../../src/compiler/glsl/builtin_functions.cpp:5444
#4  0x00007fd93bac9759 in _mesa_destroy_shader_compiler() () at ../../../src/compiler/glsl/glsl_parser_extras.cpp:1957
#5  0x00007fd93bac9759 in _mesa_destroy_shader_compiler() () at ../../../src/compiler/glsl/glsl_parser_extras.cpp:1944
#6  0x00007fd93b8a0af9 in one_time_fini () at ../../../src/mesa/main/context.c:357
#7  0x00007fd9513d7b78 in __run_exit_handlers (status=status@entry=0, listp=0x7fd95173d5f8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true) at exit.c:82
#8  0x00007fd9513d7bc5 in __GI_exit (status=status@entry=0) at exit.c:104
#9  0x00007fd952e9d9c4 in totem_object_exit (totem=<optimized out>) at totem-object.c:1364
#10 0x00007fd952e9db3c in main_window_destroy_cb (widget=<optimized out>, event=<optimized out>, totem=<optimized out>) at totem-object.c:1370
#11 0x00007fd95246e57a in _gtk_marshal_BOOLEAN__BOXEDv (closure=0x55d8529bbbc0, return_value=0x7ffe0b0b9950, instance=<optimized out>, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x55d852287be0) at /build/gtk+3.0-MFQuqz/gtk+3.0-3.20.6/./gtk/gtkmarshalers.c:131
#12 0x00007fd951c811d4 in _g_closure_invoke_va (closure=closure@entry=0x55d8529bbbc0, return_value=return_value@entry=0x7ffe0b0b9950, instance=instance@entry=0x55d8529c43e0, args=args@entry=0x7ffe0b0b9a20, n_params=<optimized out>, param_types=0x55d852287be0) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./gobject/gclosure.c:867
#13 0x00007fd951c9b4b8 in g_signal_emit_valist (instance=0x55d8529c43e0, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7ffe0b0b9a20) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./gobject/gsignal.c:3294
#14 0x00007fd951c9c08f in g_signal_emit (instance=instance@entry=0x55d8529c43e0, signal_id=<optimized out>, detail=detail@entry=0) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./gobject/gsignal.c:3441
#15 0x00007fd9525b13dc in gtk_widget_event_internal (widget=0x55d8529c43e0 [GtkApplicationWindow], event=0x55d8533c0990) at /build/gtk+3.0-MFQuqz/gtk+3.0-3.20.6/./gtk/gtkwidget.c:7705
#16 0x00007fd95246d65d in gtk_main_do_event (event=event@entry=0x55d8533c0990) at /build/gtk+3.0-MFQuqz/gtk+3.0-3.20.6/./gtk/gtkmain.c:1760
#17 0x00007fd9525c76d1 in send_delete_event (data=0x55d8529c43e0) at /build/gtk+3.0-MFQuqz/gtk+3.0-3.20.6/./gtk/gtkwindow.c:1320
#18 0x00007fd94e828b38 in gdk_threads_dispatch (data=0x55d8553f60e0) at /build/gtk+3.0-MFQuqz/gtk+3.0-3.20.6/./gdk/gdk.c:720
#19 0x00007fd9519aa05a in g_main_context_dispatch (context=0x55d85227b540) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./glib/gmain.c:3154
#20 0x00007fd9519aa05a in g_main_context_dispatch (context=context@entry=0x55d85227b540) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./glib/gmain.c:3769
#21 0x00007fd9519aa400 in g_main_context_iterate (context=context@entry=0x55d85227b540, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./glib/gmain.c:3840
#22 0x00007fd9519aa4ac in g_main_context_iteration (context=context@entry=0x55d85227b540, may_block=may_block@entry=1) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./glib/gmain.c:3901
#23 0x00007fd951f71cdd in g_application_run (application=0x55d8522581a0 [TotemObject], argc=2, argv=0x7ffe0b0b9e78) at /build/glib2.0-vjfO_h/glib2.0-2.48.1/./gio/gapplication.c:2381
#24 0x000055d8504dcdf8 in main (argc=2, argv=0x7ffe0b0b9e78) at totem.c:83