simon@beutelteufel:~$ gdb /usr/bin/epiphany-browser 
GNU gdb (GDB) 7.0.1-debian
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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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-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/epiphany-browser...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/epiphany-browser 
[Thread debugging using libthread_db enabled]
[New Thread 0x7fffe2888700 (LWP 3617)]
[New Thread 0x7fffe1f67700 (LWP 3618)]
[New Thread 0x7fffe0a20700 (LWP 3619)]
[New Thread 0x7fffdb87f700 (LWP 3620)]
[New Thread 0x7fffdb07e700 (LWP 3621)]
[New Thread 0x7fffda87d700 (LWP 3622)]
[New Thread 0x7fffda07c700 (LWP 3623)]
[New Thread 0x7fffd987b700 (LWP 3624)]
[New Thread 0x7fffd907a700 (LWP 3625)]
[New Thread 0x7fffd8879700 (LWP 3626)]
[New Thread 0x7fffd8078700 (LWP 3627)]
[New Thread 0x7fffd7877700 (LWP 3628)]
[New Thread 0x7fffd7076700 (LWP 3629)]
[Thread 0x7fffd7877700 (LWP 3628) exited]
[Thread 0x7fffd8078700 (LWP 3627) exited]
[Thread 0x7fffd8879700 (LWP 3626) exited]
[Thread 0x7fffd907a700 (LWP 3625) exited]
[Thread 0x7fffd987b700 (LWP 3624) exited]
[Thread 0x7fffda07c700 (LWP 3623) exited]
[Thread 0x7fffda87d700 (LWP 3622) exited]
[Thread 0x7fffdb07e700 (LWP 3621) exited]
[Thread 0x7fffdb87f700 (LWP 3620) exited]
[Thread 0x7fffe0a20700 (LWP 3619) exited]
[Thread 0x7fffd7076700 (LWP 3629) exited]

(epiphany-browser:3614): GLib-CRITICAL **: g_regex_unref: assertion `regex != NULL' failed

(epiphany-browser:3614): GLib-CRITICAL **: g_regex_replace: assertion `regex != NULL' failed

(epiphany-browser:3614): GLib-CRITICAL **: g_strchug: assertion `string != NULL' failed

(epiphany-browser:3614): GLib-CRITICAL **: g_strchomp: assertion `string != NULL' failed

Program received signal SIGSEGV, Segmentation fault.
0x000000000048710e in ?? ()
(gdb) bt
#0  0x000000000048710e in ?? ()
#1  0x00007ffff29d514e in g_closure_invoke (closure=0xa24c50, return_value=0x0, n_param_values=1, param_values=0x809ee0, invocation_hint=0x7fffffffab00)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
#2  0x00007ffff29ed657 in signal_emit_unlocked_R (node=0x8c49a0, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3252
#3  0x00007ffff29eecd6 in g_signal_emit_valist (instance=0x89b180, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffad10)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2983
#4  0x00007ffff29eeff3 in g_signal_emit_by_name (instance=0x89b180, detailed_signal=0x7ffff4305edc "changed")
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3077
#5  0x00007ffff4076f99 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#6  0x00007ffff29d514e in g_closure_invoke (closure=0xa1c760, return_value=0x0, n_param_values=2, param_values=0xc6a870, invocation_hint=0x7fffffffaf60)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
#7  0x00007ffff29ed657 in signal_emit_unlocked_R (node=0x6f4da0, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3252
#8  0x00007ffff29eecd6 in g_signal_emit_valist (instance=0xa12a30, signal_id=<value optimized out>, detail=824, var_args=0x7fffffffb150)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2983
#9  0x00007ffff29ef223 in g_signal_emit (instance=0x7fffdc000020, signal_id=0, detail=4294967264) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3040
#10 0x00007ffff29d9a89 in g_object_dispatch_properties_changed (object=0xa12a30, n_pspecs=1, pspecs=<value optimized out>)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gobject.c:925
#11 0x00007ffff29dd124 in g_object_notify_queue_thaw (object=0xa12a30, property_name=<value optimized out>)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gobjectnotifyqueue.c:132
#12 g_object_notify_by_spec_internal (object=0xa12a30, property_name=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gobject.c:983
#13 g_object_notify (object=0xa12a30, property_name=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gobject.c:1024
#14 0x00007ffff407f930 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#15 0x00007ffff29d514e in g_closure_invoke (closure=0x899690, return_value=0x0, n_param_values=4, param_values=0xc710c0, invocation_hint=0x7fffffffb480)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
#16 0x00007ffff29ecf21 in signal_emit_unlocked_R (node=0x899720, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3182
#17 0x00007ffff29eecd6 in g_signal_emit_valist (instance=0xa12a30, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffb670)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2983
#18 0x00007ffff29ef223 in g_signal_emit (instance=0x7fffdc000020, signal_id=0, detail=4294967264) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3040
#19 0x00007ffff40806d3 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#20 0x00007ffff40784c5 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x00007ffff29d514e in g_closure_invoke (closure=0x8c4090, return_value=0x0, n_param_values=4, param_values=0xc712a0, invocation_hint=0x7fffffffb920)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
#22 0x00007ffff29ed2a0 in signal_emit_unlocked_R (node=0x8c4100, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3290
#23 0x00007ffff29eecd6 in g_signal_emit_valist (instance=0x89b180, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffbb30)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2983
#24 0x00007ffff29eeff3 in g_signal_emit_by_name (instance=0x89b180, detailed_signal=0x7ffff4291584 "insert-text")
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3077
#25 0x00007ffff4070af3 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#26 0x00007ffff407aeae in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#27 0x00007ffff29d514e in g_closure_invoke (closure=0xa1c150, return_value=0x0, n_param_values=2, param_values=0xc91160, invocation_hint=0x7fffffffbdd0)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
#28 0x00007ffff29ed657 in signal_emit_unlocked_R (node=0x899000, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3252
#29 0x00007ffff29eecd6 in g_signal_emit_valist (instance=0x9c66a0, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffbfe0)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2983
#30 0x00007ffff29eeff3 in g_signal_emit_by_name (instance=0x9c66a0, detailed_signal=0x7ffff4292124 "commit")
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3077
#31 0x00007ffff29d514e in g_closure_invoke (closure=0xc18ed0, return_value=0x0, n_param_values=2, param_values=0xc91130, invocation_hint=0x7fffffffc220)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
---Type <return> to continue, or q <return> to quit---
#32 0x00007ffff29ed657 in signal_emit_unlocked_R (node=0x899000, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3252
#33 0x00007ffff29eecd6 in g_signal_emit_valist (instance=0xc98d40, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffc430)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2983
#34 0x00007ffff29eeff3 in g_signal_emit_by_name (instance=0xc98d40, detailed_signal=0x7ffff4292124 "commit")
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3077
#35 0x00007ffff40d03ba in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#36 0x00007ffff40d0db6 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#37 0x00007ffff40d2f09 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#38 0x00007ffff407c81c in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#39 0x00007ffff40eec78 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#40 0x00007ffff29d5099 in g_closure_invoke (closure=0x72f890, return_value=0x7fffffffc840, n_param_values=2, param_values=0xc69f90, 
    invocation_hint=0x7fffffffc800) at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
#41 0x00007ffff29ed2a0 in signal_emit_unlocked_R (node=0x72f900, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3290
#42 0x00007ffff29eeb1d in g_signal_emit_valist (instance=0x89b180, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffc9f0)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2993
#43 0x00007ffff29ef223 in g_signal_emit (instance=0x7fffdc000020, signal_id=0, detail=4294967264) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3040
#44 0x00007ffff4204f7f in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#45 0x00007ffff421545b in gtk_window_propagate_key_event () from /usr/lib/libgtk-x11-2.0.so.0
#46 0x00007ffff42184eb in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#47 0x00007ffff40eec78 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#48 0x00007ffff29d514e in g_closure_invoke (closure=0x72f890, return_value=0x7fffffffcd00, n_param_values=2, param_values=0xc46320, 
    invocation_hint=0x7fffffffccc0) at /tmp/buildd/glib2.0-2.28.0/./gobject/gclosure.c:767
#49 0x00007ffff29ed2a0 in signal_emit_unlocked_R (node=0x72f900, detail=<value optimized out>, instance=<value optimized out>, 
    emission_return=<value optimized out>, instance_and_params=<value optimized out>) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3290
#50 0x00007ffff29eeb1d in g_signal_emit_valist (instance=0x728b50, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffceb0)
    at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:2993
#51 0x00007ffff29ef223 in g_signal_emit (instance=0x7fffdc000020, signal_id=0, detail=4294967264) at /tmp/buildd/glib2.0-2.28.0/./gobject/gsignal.c:3040
#52 0x00007ffff4204f7f in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#53 0x00007ffff40e7234 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#54 0x00007ffff40e821b in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#55 0x00007ffff3b053cc in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#56 0x00007ffff23172e2 in g_main_dispatch (context=0x714270) at /tmp/buildd/glib2.0-2.28.0/./glib/gmain.c:2440
#57 g_main_context_dispatch (context=0x714270) at /tmp/buildd/glib2.0-2.28.0/./glib/gmain.c:3013
#58 0x00007ffff231b9a8 in g_main_context_iterate (context=0x714270, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /tmp/buildd/glib2.0-2.28.0/./glib/gmain.c:3091
#59 0x00007ffff231beb5 in g_main_loop_run (loop=0x764fe0) at /tmp/buildd/glib2.0-2.28.0/./glib/gmain.c:3299
#60 0x00007ffff40e86b7 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#61 0x00000000004359a3 in main ()
(gdb)