First attempt with values:

Breakpoint 1, 0xb7de4750 in meta_warning () from /usr/lib/libmutter.so.0
(gdb) bt
#0  0xb7de4750 in meta_warning () from /usr/lib/libmutter.so.0
#1  0xb7dd352d in ?? () from /usr/lib/libmutter.so.0
#2  0xb641b4b7 in g_logv (log_domain=0xb6512ccb "GLib-GObject", log_level=<optimized out>, format=0xb651a95c "invalid (NULL) pointer instance", 
    args1=0xbfffdbdc "\264\250P\266\240\302\265\230\265") at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmessages.c:545
#3  0xb641b833 in g_log (log_domain=0xb6512ccb "GLib-GObject", log_level=G_LOG_LEVEL_WARNING, format=0xb651a95c "invalid (NULL) pointer instance")
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmessages.c:591
#4  0xb650ad80 in g_type_check_instance (type_instance=0x0) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gtype.c:4078
#5  0xb64ffeda in g_signal_handlers_disconnect_matched (instance=0x0, mask=24, signal_id=0, detail=0, closure=0x0, func=0xb7f89c70, data=0x98b5c2a0)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:2692
#6  0xb7f8a4aa in st_im_text_dispose (object=0x98b5c2a0) at st/st-im-text.c:91
#7  0xb64e7d78 in g_object_unref (_object=0x98b5c2a0) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gobject.c:2709
#8  0xb72def9d in clutter_actor_destroy (self=0x98b5c2a0) at ./clutter-actor.c:5373
#9  0xb7f866a7 in st_entry_dispose (object=0x95fb4f8) at st/st-entry.c:215
#10 0xb64ea057 in g_object_run_dispose (object=0x95fb4f8) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gobject.c:945
#11 0xb72def91 in clutter_actor_destroy (self=0x95fb4f8) at ./clutter-actor.c:5368
#12 0xb774558a in ffi_call_SYSV () from /usr/lib/i386-linux-gnu/libffi.so.5
    at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:912
#20 0xb7aaad0d in EvalKernel (cx=0x83476c0, call=..., evalType=DIRECT_EVAL, caller=0xae3d9098, scopeobj=...) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsobj.cpp:1279
#21 0xb7abcaee in EvalKernel (scopeobj=..., caller=0xae3d9098, evalType=DIRECT_EVAL, call=..., cx=0x83476c0) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsobj.cpp:1166
#22 js::DirectEval (cx=0x83476c0, call=...) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsobj.cpp:1342
#23 0xb7a8e1e7 in js::Interpret (cx=0x83476c0, entryFrame=0xae3d9048, interpMode=js::JSINTERP_NORMAL) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:3986
#24 0xb7a988ac in js::Invoke (cx=0x83476c0, argsRef=..., construct=js::NO_CONSTRUCT) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:687
#25 0xb7a6776a in Invoke (construct=js::NO_CONSTRUCT, args=..., cx=0x83476c0) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.h:169
#26 js::CallOrConstructBoundFunction (cx=0x83476c0, argc=1, vp=0xae3d9010) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsfun.cpp:2013
#27 0xb7a98908 in CallJSNative (args=..., native=<optimized out>, cx=0x83476c0) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jscntxtinlines.h:281
#28 js::Invoke (cx=0x83476c0, argsRef=..., construct=js::NO_CONSTRUCT) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:657
#29 0xb7a98fac in Invoke (construct=js::NO_CONSTRUCT, args=..., cx=0x83476c0) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.h:169
#30 js::ExternalInvoke (cx=0x83476c0, thisv=..., fval=..., argc=1, argv=0xbfffeaf0, rval=0xbfffeb50) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:809
#31 0xb7a0e692 in JS_CallFunctionValue (cx=0x83476c0, obj=0x0, fval=18446743556597311216, argc=1, argv=0xbfffeaf0, rval=0xbfffeb50)
    at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsapi.cpp:5052
#32 0xb7d62a82 in gjs_call_function_value () from /usr/lib/libgjs.so.0
#33 0xb7d6ee36 in gjs_closure_invoke () from /usr/lib/libgjs.so.0
#34 0xb7d792fb in ?? () from /usr/lib/libgjs.so.0
#35 0xb64e53dc in g_closure_invoke (closure=0x8dfad10, return_value=0x0, n_param_values=1, param_values=0xb3800d38, invocation_hint=0xbfffec70)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gclosure.c:774
#36 0xb64f8180 in signal_emit_unlocked_R (node=0x868b0b8, detail=0, instance=0x8a1e9c8, emission_return=0x0, instance_and_params=0xb3800d38)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3272
#37 0xb6500f17 in g_signal_emit_valist (instance=0x8a1e9c8, signal_id=303, detail=0, var_args=0xbfffee2c "\306\324P\266\247\236\064\267\360\213:\267l\357\377\277[\237\064\267\310\351\241\b")
---Type <return> to continue, or q <return> to quit---
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3003
#38 0xb6501083 in g_signal_emit (instance=0x8a1e9c8, signal_id=303, detail=0) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3060
#39 0xb7349f30 in clutter_text_activate (self=0x8a1e9c8) at ./clutter-text.c:3902
#40 0xb7349f5b in clutter_text_real_activate (self=0x8a1e9c8, action=0xb6d058e4 "activate", keyval=65293, modifiers=0) at ./clutter-text.c:2818
#41 0xb735f8c0 in _clutter_marshal_BOOLEAN__STRING_UINT_FLAGS (closure=0x8691da8, return_value=0xbfffefbc, n_param_values=4, param_values=0xbfffef6c, invocation_hint=0x0, marshal_data=0x0)
    at clutter-marshal.c:167
#42 0xb64e53dc in g_closure_invoke (closure=0x8691da8, return_value=0xbfffefbc, n_param_values=4, param_values=0xbfffef6c, invocation_hint=0x0)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gclosure.c:774
#43 0xb72f4fcf in clutter_binding_entry_invoke (gobject=0x8a1e9c8, entry=0x85f0848) at ./clutter-binding-pool.c:807
#44 clutter_binding_pool_activate (pool=0x85f0798, key_val=65293, modifiers=0, gobject=0x8a1e9c8) at ./clutter-binding-pool.c:872
#45 0xb734fb9c in clutter_text_key_press (event=0x8e1d1d8, actor=0x8a1e9c8) at ./clutter-text.c:1947
#46 clutter_text_key_press (actor=0x8a1e9c8, event=0x8e1d1d8) at ./clutter-text.c:1923
#47 0xb7f8a0b1 in st_im_text_key_press_event (actor=0x8a1e9c8, event=0x8e1d1d8) at st/st-im-text.c:343
#48 0xb735f6e2 in _clutter_marshal_BOOLEAN__BOXED (closure=0x8179878, return_value=0xbffff1e4, n_param_values=2, param_values=0xb38f2740, invocation_hint=0xbffff1d0, marshal_data=0xb7f89ff0)
    at clutter-marshal.c:85
#49 0xb64e3e2d in g_type_class_meta_marshal (closure=0x8179878, return_value=0xbffff1e4, n_param_values=2, param_values=0xb38f2740, invocation_hint=0xbffff1d0, marshal_data=0x98)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gclosure.c:885
#50 0xb64e53dc in g_closure_invoke (closure=0x8179878, return_value=0xbffff1e4, n_param_values=2, param_values=0xb38f2740, invocation_hint=0xbffff1d0)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gclosure.c:774
#51 0xb64f7fc8 in signal_emit_unlocked_R (node=0x8317be8, detail=0, instance=0x8a1e9c8, emission_return=0xbffff31c, instance_and_params=0xb38f2740)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3310
#52 0xb6500d29 in g_signal_emit_valist (instance=0x8a1e9c8, signal_id=191, detail=0, var_args=0xbffff390 "\254\363\377\277")
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3013
#53 0xb6501083 in g_signal_emit (instance=0x8a1e9c8, signal_id=191, detail=0) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3060
#54 0xb72d1fb7 in clutter_actor_event (actor=0x8a1e9c8, event=0x8e1d1d8, capture=0) at ./clutter-actor.c:8702
#55 0xb7319ad9 in emit_event (is_key_event=1, event=0x8e1d1d8) at ./clutter-main.c:1967
#56 emit_keyboard_event (event=0x8e1d1d8) at ./clutter-main.c:2017
#57 _clutter_process_event_details (event=0x8e1d1d8, stage=<optimized out>, context=<optimized out>) at ./clutter-main.c:2107
#58 _clutter_process_event (event=0x8e1d1d8) at ./clutter-main.c:2330
#59 0xb7334990 in _clutter_stage_process_queued_events (stage=0x8065e78) at ./clutter-stage.c:898
#60 0xb731b6e7 in clutter_clock_dispatch (source=0x8066ab8, callback=0, user_data=0x0) at ./clutter-master-clock.c:360
#61 0xb6412a3f in g_main_dispatch (context=0x805aa90) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:2442
#62 g_main_context_dispatch (context=0x805aa90) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:2998
#63 0xb6413170 in g_main_context_iterate (context=0x805aa90, block=-1237181744, dispatch=1, self=<optimized out>)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:3076
#64 0xb641377b in g_main_loop_run (loop=0x805c198) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:3284
#65 0xb7dd3e50 in meta_run () from /usr/lib/libmutter.so.0
#66 0x0804a537 in main (argc=1, argv=0xbffff774) at main.c:571
#6  0xb7f8a4aa in st_im_text_dispose (object=0x98b5c2a0) at st/st-im-text.c:91
91	  g_signal_handlers_disconnect_by_func (priv->im_context,
(gdb) p object
$1 = (GObject *) 0x98b5c2a0
(gdb) l
86	static void
87	st_im_text_dispose (GObject *object)
88	{
89	  StIMTextPrivate *priv = ST_IM_TEXT (object)->priv;
90	
91	  g_signal_handlers_disconnect_by_func (priv->im_context,
92	                                        (void *) st_im_text_commit_cb,
93	                                        object);
94	
95	  g_object_unref (priv->im_context);
(gdb) p *object
$2 = {g_type_instance = {g_class = 0x8859930}, ref_count = 1, qdata = 0x0}
(gdb) p (StIMText *)object
$3 = (StIMText *) 0x98b5c2a0
(gdb) p *(StIMText *)object
$4 = {parent_instance = {parent_instance = {parent_instance = {g_type_instance = {g_class = 0x8859930}, ref_count = 1, qdata = 0x0}, flags = 24, private_flags = 0, priv = 0x98b5c2c0}, 
    priv = 0x98b5c5b0}, priv = 0x98b5c6d0}
(gdb) p ((StIMText *)object)->priv
$5 = (StIMTextPrivate *) 0x98b5c6d0
(gdb) p ((StIMText *)object)->priv
$6 = (StIMTextPrivate *) 0x98b5c6d0
(gdb) p *((StIMText *)object)->priv
$7 = {im_context = 0x0, window = 0x0, need_im_reset = 0}


Second attempt that show the double call to st_im_text_dispose :

Breakpoint 2, st_im_text_dispose (object=0x8cb2d00) at st/st-im-text.c:88
88	{
(gdb) bt
#0  st_im_text_dispose (object=0x8cb2d00) at st/st-im-text.c:88
#1  0xb64ea057 in g_object_run_dispose (object=0x8cb2d00) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gobject.c:945
#2  0xb72def91 in clutter_actor_destroy (self=0x8cb2d00) at ./clutter-actor.c:5368
#3  0xb7f866a7 in st_entry_dispose (object=0x9740a38) at st/st-entry.c:215
#4  0xb64ea057 in g_object_run_dispose (object=0x9740a38) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gobject.c:945
#5  0xb72def91 in clutter_actor_destroy (self=0x9740a38) at ./clutter-actor.c:5368
#6  0xb640dcd8 in g_list_foreach (list=<optimized out>, func=0xb72def10 <clutter_actor_destroy>, user_data=0x0)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/glist.c:938
#7  0xb7f842c2 in st_container_dispose (object=0x8e1a0a0) at st/st-container.c:413
#8  0xb7f8050a in st_box_layout_dispose (object=0x8e1a0a0) at st/st-box-layout.c:289
#9  0xb64ea057 in g_object_run_dispose (object=0x8e1a0a0) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gobject.c:945
#10 0xb72def91 in clutter_actor_destroy (self=0x8e1a0a0) at ./clutter-actor.c:5368
#11 0xb774558a in ffi_call_SYSV () from /usr/lib/i386-linux-gnu/libffi.so.5
#12 0xb774520d in ffi_call () from /usr/lib/i386-linux-gnu/libffi.so.5
#13 0xb7d71400 in ?? () from /usr/lib/libgjs.so.0
#14 0xb7d71c19 in ?? () from /usr/lib/libgjs.so.0
#15 0xb7a989a1 in CallJSNative (args=..., native=<optimized out>, cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jscntxtinlines.h:281
#16 js::Invoke (cx=0x8347c08, argsRef=..., construct=js::NO_CONSTRUCT) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:650
#17 0xb7a84153 in js::Interpret (cx=0x8347c08, entryFrame=0xae3d81b0, interpMode=js::JSINTERP_NORMAL) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:4016
#18 0xb7a988ac in js::Invoke (cx=0x8347c08, argsRef=..., construct=js::NO_CONSTRUCT) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:687
#19 0xb7a1ba73 in Invoke (construct=js::NO_CONSTRUCT, args=..., cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.h:169
#20 invoke (cx=0x8347c08, this=0xbfffe5b8) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterpinlines.h:133
#21 invoke (cx=0x8347c08, this=0xbfffe5b8) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsarray.cpp:2734
#22 array_extra (cx=0x8347c08, mode=FOREACH, argc=<optimized out>, vp=0xae3d8158) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsarray.cpp:2858
#23 0xb7a98908 in CallJSNative (args=..., native=<optimized out>, cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jscntxtinlines.h:281
#24 js::Invoke (cx=0x8347c08, argsRef=..., construct=js::NO_CONSTRUCT) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:657
#25 0xb7a84153 in js::Interpret (cx=0x8347c08, entryFrame=0xae3d8068, interpMode=js::JSINTERP_NORMAL) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:4016
#26 0xb7a988ac in js::Invoke (cx=0x8347c08, argsRef=..., construct=js::NO_CONSTRUCT) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:687
#27 0xb7a6776a in Invoke (construct=js::NO_CONSTRUCT, args=..., cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.h:169
#28 js::CallOrConstructBoundFunction (cx=0x8347c08, argc=2, vp=0xae3d8010) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsfun.cpp:2013
#29 0xb7a98908 in CallJSNative (args=..., native=<optimized out>, cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jscntxtinlines.h:281
#30 js::Invoke (cx=0x8347c08, argsRef=..., construct=js::NO_CONSTRUCT) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:657
#31 0xb7a98fac in Invoke (construct=js::NO_CONSTRUCT, args=..., cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.h:169
#32 js::ExternalInvoke (cx=0x8347c08, thisv=..., fval=..., argc=2, argv=0xbfffecd0, rval=0xbfffed30) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsinterp.cpp:809
#33 0xb7a0e692 in JS_CallFunctionValue (cx=0x8347c08, obj=0x0, fval=18446743556588915936, argc=2, argv=0xbfffecd0, rval=0xbfffed30)
    at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsapi.cpp:5052
#34 0xb7d62a82 in gjs_call_function_value () from /usr/lib/libgjs.so.0
#35 0xb7d6ee36 in gjs_closure_invoke () from /usr/lib/libgjs.so.0
#36 0xb7d792fb in ?? () from /usr/lib/libgjs.so.0
#37 0xb64e53dc in g_closure_invoke (closure=0x853a880, return_value=0x0, n_param_values=2, param_values=0xa953fa50, invocation_hint=0xbfffee50)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gclosure.c:774
#38 0xb64f8180 in signal_emit_unlocked_R (node=0x86fbc80, detail=0, instance=0x94c11d0, emission_return=0x0, instance_and_params=0xa953fa50)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3272
#39 0xb6500f17 in g_signal_emit_valist (instance=0x94c11d0, signal_id=304, detail=0, 
    var_args=0xbffff010 "\320\021L\t \335;\b\024\337\322\227\224\336\375\267\376\377\377\377\320\021L\t\030]D\b\236(\370\267\001")
---Type <return> to continue, or q <return> to quit---
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3003
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gclosure.c:885
#46 0xb64e53dc in g_closure_invoke (closure=0x8178768, return_value=0xbffff1e4, n_param_values=2, param_values=0xa954d8c8, invocation_hint=0xbffff1d0)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gclosure.c:774
#47 0xb64f7fc8 in signal_emit_unlocked_R (node=0x8317ab0, detail=0, instance=0x94c11d0, emission_return=0xbffff31c, instance_and_params=0xa954d8c8)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3310
#48 0xb6500d29 in g_signal_emit_valist (instance=0x94c11d0, signal_id=189, detail=0, var_args=0xbffff390 "\254\363\377\277\030]D\bH^\006\b\330xR\266\360\213:\267\260]\005\b\030\244\021\b")
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3013
#49 0xb6501083 in g_signal_emit (instance=0x94c11d0, signal_id=189, detail=0) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gsignal.c:3060
#50 0xb72d1fb7 in clutter_actor_event (actor=0x94c11d0, event=0x8445d18, capture=0) at ./clutter-actor.c:8702
#51 0xb7318f9c in emit_pointer_event (device=<optimized out>, event=0x8445d18) at ./clutter-main.c:2006
#52 emit_pointer_event (device=<optimized out>, event=<optimized out>) at ./clutter-main.c:2314
#53 _clutter_process_event_details (event=0x8445d18, stage=<optimized out>, context=<optimized out>) at ./clutter-main.c:2291
#54 _clutter_process_event (event=0x8445d18) at ./clutter-main.c:2330
#55 0xb7334990 in _clutter_stage_process_queued_events (stage=0x8065e48) at ./clutter-stage.c:898
#56 0xb731b6e7 in clutter_clock_dispatch (source=0x83162c8, callback=0, user_data=0x0) at ./clutter-master-clock.c:360
#57 0xb6412a3f in g_main_dispatch (context=0x805aa90) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:2442
#58 g_main_context_dispatch (context=0x805aa90) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:2998
#59 0xb6413170 in g_main_context_iterate (context=0x805aa90, block=-1237181744, dispatch=1, self=<optimized out>)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:3076
#60 0xb641377b in g_main_loop_run (loop=0x805c198) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:3284
#61 0xb7dd3e50 in meta_run () from /usr/lib/libmutter.so.0
#62 0x0804a537 in main (argc=1, argv=0xbffff774) at main.c:571
(gdb) 
(gdb) 
(gdb) 
(gdb) c
Continuing.
Breakpoint 2, st_im_text_dispose (object=0x8cb2d00) at st/st-im-text.c:88
88	{
(gdb) bt
#0  st_im_text_dispose (object=0x8cb2d00) at st/st-im-text.c:88
#1  0xb64e7d78 in g_object_unref (_object=0x8cb2d00) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gobject.c:2709
#2  0xb64ef348 in g_object_remove_toggle_ref (object=0x8cb2d00, notify=0xb7d733f0, data=0xaefd9008) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./gobject/gobject.c:2629
#3  0xb7d732d0 in ?? () from /usr/lib/libgjs.so.0
#4  0xb7a73933 in finalize (this=0x98d9b0b0, cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsobjinlines.h:143
#5  finalize<JSObject> (cx=0x8347c08, this=0x98d9b000) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsgc.cpp:244
#6  FinalizeArenas<JSObject> (listHeadp=0x8358b08, cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsgc.cpp:287
#7  finalizeNow<JSObject> (cx=0x8347c08, this=0x8358b08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsgc.cpp:1235
#8  JSCompartment::finalizeObjectArenaLists (this=0x8358b00, cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsgc.cpp:1977
#9  0xb7a755cd in MarkAndSweep (gcTimer=..., gckind=GC_NORMAL, comp=0x0, cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsgc.cpp:2361
#10 GCCycle (cx=0x8347c08, comp=0x0, gckind=GC_NORMAL, gcTimer=...) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsgc.cpp:2653
#11 0xb7a75be2 in js_GC (cx=0x8347c08, comp=0x0, gckind=GC_NORMAL) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsgc.cpp:2739
#12 0xb7a08149 in JS_CompartmentGC (cx=0x8347c08, comp=0x0) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsapi.cpp:2600
#13 0xb7a081ba in JS_GC (cx=0x8347c08) at /build/buildd-iceweasel_8.0-3-i386-3aZlPK/iceweasel-8.0/js/src/jsapi.cpp:2607
#14 0xb7d5e67e in gjs_context_gc () from /usr/lib/libgjs.so.0
#15 0xb7f69afb in run_leisure_functions (data=0x8320e48) at shell-global.c:1441
#16 0xb640f270 in g_idle_dispatch (source=0x8eb8d88, callback=0xb7f69ac0 <run_leisure_functions>, user_data=0x8320e48)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:4776
#17 0xb6412a3f in g_main_dispatch (context=0x805aa90) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:2442
#18 g_main_context_dispatch (context=0x805aa90) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:2998
#19 0xb6413170 in g_main_context_iterate (context=0x805aa90, block=-1237181744, dispatch=1, self=<optimized out>)
    at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:3076
#20 0xb641377b in g_main_loop_run (loop=0x805c198) at /build/buildd-glib2.0_2.30.2-4-i386-4jiwMk/glib2.0-2.30.2/./glib/gmain.c:3284
#21 0xb7dd3e50 in meta_run () from /usr/lib/libmutter.so.0
#22 0x0804a537 in main (argc=1, argv=0xbffff774) at main.c:571




