backtrace full

#0  g_logv (log_domain=0x7ffff032c318 "Gtk", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7fffffffc5b0) at gmessages.c:1046
        domain = 0x0
        data = 0x0
        depth = 0
        log_func = 0x496e95 <trap_handler>
        domain_fatal_mask = <optimized out>
        masquerade_fatal = 0
        test_level = <optimized out>
        was_fatal = <optimized out>
        was_recursion = <optimized out>
        msg = 0x2ba8960 "gtk_widget_get_parent: assertion 'GTK_IS_WIDGET (widget)' failed"
        msg_alloc = 0x2ba8960 "gtk_widget_get_parent: assertion 'GTK_IS_WIDGET (widget)' failed"
        i = 3
#1  0x00007fffee1a118f in g_log (log_domain=log_domain@entry=0x7ffff032c318 "Gtk", log_level=log_level@entry=G_LOG_LEVEL_CRITICAL, format=format@entry=0x7fffee20fffd "%s: assertion '%s' failed") at gmessages.c:1079
        args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fffffffc690, reg_save_area = 0x7fffffffc5d0}}
#2  0x00007fffee1a11c9 in g_return_if_fail_warning (log_domain=log_domain@entry=0x7ffff032c318 "Gtk", pretty_function=pretty_function@entry=0x7ffff03a59b0 <__FUNCTION__.63009> "gtk_widget_get_parent", expression=expression@entry=0x7ffff032c378 "GTK_IS_WIDGET (widget)") at gmessages.c:1088
No locals.
#3  0x00007ffff02e3894 in gtk_widget_get_parent (widget=0x0) at gtkwidget.c:9596
        widget = 0x0
#4  0x0000000000437d5e in tab_has_modified_forms_cb (view=0x2571940, result=0x2b96ac0, window=0x8e04e0) at ephy-window.c:2802
        has_modified_forms = 0
#5  0x00007fffee75f403 in g_task_return_now (task=0x2b96ac0) at gtask.c:1088
No locals.
#6  0x00007fffee75fa9e in g_task_return (task=0x2b96ac0, type=<optimized out>) at gtask.c:1146
        source = 0x7fffd800bd80
#7  0x000000000047e09f in has_modified_forms_cb (web_extension=0xb01b20, result=0x2b96b90, task=0x2b96ac0) at ephy-web-view.c:2632
        retval = 0
#8  0x00007fffee75f403 in g_task_return_now (task=0x2b96b90) at gtask.c:1088
No locals.
#9  0x00007fffee75fa9e in g_task_return (task=0x2b96b90, type=<optimized out>) at gtask.c:1146
        source = 0x7fffd800bd80
#10 0x000000000047fa0d in has_modified_forms_cb (proxy=0x27a2e50, result=0x2abae30, task=0x2b96b90) at ephy-web-extension-proxy.c:202
        return_value = 0x2bcce90
        retval = 0
#11 0x00007fffee74ee37 in g_simple_async_result_complete (simple=0x2abae30) at gsimpleasyncresult.c:763
        current_source = 0x7fffd800bd80
        current_context = <optimized out>
        __FUNCTION__ = "g_simple_async_result_complete"
#12 0x00007fffee7b6bc1 in reply_cb (connection=<optimized out>, res=<optimized out>, user_data=0x2abae30) at gdbusproxy.c:2623
        simple = 0x2abae30
        value = <optimized out>
        error = 0x0
        fd_list = 0x0
#13 0x00007fffee74ee37 in g_simple_async_result_complete (simple=0x2abaf10) at gsimpleasyncresult.c:763
        current_source = 0x7fffd800bd80
        current_context = <optimized out>
        __FUNCTION__ = "g_simple_async_result_complete"
#14 0x00007fffee7abe32 in g_dbus_connection_call_done (source=<optimized out>, result=<optimized out>, user_data=0x2b9ea00) at gdbusconnection.c:5508
        simple = 0x2abaf10
        connection = <optimized out>
        state = 0x2b9ea00
        error = 0x0
        reply = 0x2a14770
#15 0x00007fffee74ee37 in g_simple_async_result_complete (simple=0x7fffd8003350) at gsimpleasyncresult.c:763
        current_source = 0x7fffd800bd80
        current_context = <optimized out>
        __FUNCTION__ = "g_simple_async_result_complete"
#16 0x00007fffee74ee99 in complete_in_idle_cb (data=<optimized out>) at gsimpleasyncresult.c:775
        simple = <optimized out>
#17 0x00007fffee199d9d in g_main_dispatch (context=0x724f00) at gmain.c:3122
        dispatch = 0x7fffee196860 <g_idle_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x7fffd8003350
        callback = 0x7fffee74ee90 <complete_in_idle_cb>
        cb_funcs = <optimized out>
        cb_data = 0x7fffd800be70
        need_destroy = <optimized out>
        source = 0x7fffd800bd80
        current = 0x7510a0
        i = 1
#18 g_main_context_dispatch (context=context@entry=0x724f00) at gmain.c:3737
No locals.
#19 0x00007fffee19a170 in g_main_context_iterate (context=context@entry=0x724f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3808
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 4
        fds = 0x28402b0
#20 0x00007fffee19a21c in g_main_context_iteration (context=0x724f00, context@entry=0x0, may_block=may_block@entry=1) at gmain.c:3869
        retval = <optimized out>
#21 0x00007fffee78367c in g_application_run (application=0x7ca1d0, argc=<optimized out>, argv=0x7fffffffcbe8) at gapplication.c:2308
        arguments = 0x79ea60
        status = 0
        __FUNCTION__ = "g_application_run"
#22 0x000000000042f219 in main (argc=1, argv=0x7fffffffcbe8) at ephy-main.c:484
        option_context = 0x6f87a0
        option_group = 0x6f8820
        error = 0x0
        user_time = 3218021
        arbitrary_url = 0
        ctx = 0x824240
        startup_flags = (unknown: 0)
        mode = EPHY_EMBED_SHELL_MODE_BROWSER
        ephy_shell = 0x7ca1d0
        status = 0
        flags = EPHY_FILE_HELPERS_ENSURE_EXISTS



info registers

rax            0x0	0
rbx            0x0	0
rcx            0x7fffed6d4d5d	140737176751453
rdx            0x0	0
rsi            0x0	0
rdi            0x7fffed6bf760	140737176663904
rbp            0x7ffff032c318	0x7ffff032c318
rsp            0x7fffffffc4f0	0x7fffffffc4f0
r8             0xfcf0	64752
r9             0x16	22
r10            0x20	32
r11            0x0	0
r12            0x3	3
r13            0x8	8
r14            0x2	2
r15            0x8	8
rip            0x7fffee1a0f50	0x7fffee1a0f50 <g_logv+480>
eflags         0x246	[ PF ZF IF ]
cs             0x33	51
ss             0x2b	43
ds             0x0	0
es             0x0	0
fs             0x0	0
gs             0x0	0



x/16i $pc

=> 0x7fffee1a0f50 <g_logv+480>:	lea    0x2e7329(%rip),%rdi        # 0x7fffee488280 <g_log_depth>
   0x7fffee1a0f57 <g_logv+487>:	mov    %ebx,%esi
   0x7fffee1a0f59 <g_logv+489>:	callq  0x7fffee1de130 <g_private_set>
   0x7fffee1a0f5e <g_logv+494>:	test   %r12d,%r12d
   0x7fffee1a0f61 <g_logv+497>:	jle    0x7fffee1a0f7b <g_logv+523>
   0x7fffee1a0f63 <g_logv+499>:	nopl   0x0(%rax,%rax,1)
   0x7fffee1a0f68 <g_logv+504>:	sub    $0x1,%r12d
   0x7fffee1a0f6c <g_logv+508>:	bt     %r12,%r15
   0x7fffee1a0f70 <g_logv+512>:	jb     0x7fffee1a0e48 <g_logv+216>
   0x7fffee1a0f76 <g_logv+518>:	test   %r12d,%r12d
   0x7fffee1a0f79 <g_logv+521>:	jne    0x7fffee1a0f68 <g_logv+504>
   0x7fffee1a0f7b <g_logv+523>:	mov    0x8(%rsp),%rdi
   0x7fffee1a0f80 <g_logv+528>:	callq  0x7fffee19fae0 <g_free>
   0x7fffee1a0f85 <g_logv+533>:	jmpq   0x7fffee1a0d9c <g_logv+44>
   0x7fffee1a0f8a <g_logv+538>:	nopw   0x0(%rax,%rax,1)
   0x7fffee1a0f90 <g_logv+544>:	test   %r14d,%r14d



thread apply all backtrace


Thread 31 (Thread 0x7fffde034700 (LWP 11522)):
#0  0x00007fffed6d54fd in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff2d65a99 in sleep_for<long, std::ratio<1l, 1000l> > () at /usr/include/c++/4.9/thread:282
#2  0x00007ffff2d62a8e in sleep () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/bmalloc/bmalloc/StaticMutex.h:64
#3  0x00007ffff2d62ae0 in waitUntilFalse () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/bmalloc/bmalloc/StaticMutex.h:74
#4  0x00007ffff2d62f24 in scavenge () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/bmalloc/bmalloc/Heap.cpp:90
#5  0x00007ffff2d62ed0 in concurrentScavenge () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/bmalloc/bmalloc/Heap.cpp:85
#6  0x00007ffff2d67014 in threadRunLoop () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/bmalloc/bmalloc/AsyncTask.h:143
#7  0x00007ffff2d66b0e in threadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/bmalloc/bmalloc/AsyncTask.h:127
#8  0x00007ffff2d694f2 in _M_invoke<0ul> () at /usr/include/c++/4.9/functional:1700
#9  0x00007ffff2d693ae in operator() () at /usr/include/c++/4.9/functional:1688
#10 0x00007ffff2d692c4 in _M_run () at /usr/include/c++/4.9/thread:115
#11 0x00007fffe8d15dd0 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#12 0x00007fffed6ce0a5 in start_thread (arg=0x7fffde034700) at pthread_create.c:309
#13 0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 30 (Thread 0x7fff6538d700 (LWP 11180)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fffee1de84a in g_cond_wait_until (cond=cond@entry=0x7c1ca8, mutex=mutex@entry=0x7c1ca0, end_time=end_time@entry=3321066222) at gthread-posix.c:1442
#2  0x00007fffee16ed19 in g_async_queue_pop_intern_unlocked (queue=0x7c1ca0, wait=wait@entry=1, end_time=3321066222) at gasyncqueue.c:422
#3  0x00007fffee16f378 in g_async_queue_timeout_pop_unlocked (queue=<optimized out>, timeout=timeout@entry=500000) at gasyncqueue.c:570
#4  0x00007fffee1c1510 in g_thread_pool_wait_for_new_task (pool=0x7c1d50) at gthreadpool.c:262
#5  g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:296
#6  0x00007fffee1c0ba5 in g_thread_proxy (data=0x2b2e2d0) at gthread.c:764
#7  0x00007fffed6ce0a5 in start_thread (arg=0x7fff6538d700) at pthread_create.c:309
#8  0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 15 (Thread 0x7fff64b8c700 (LWP 9354)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7fff500008c0, timeout=-1, context=0x258b010) at gmain.c:4103
#2  g_main_context_iterate (context=context@entry=0x258b010, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a21c in g_main_context_iteration (context=0x258b010, may_block=may_block@entry=1) at gmain.c:3869
#4  0x00007fffee19a259 in glib_worker_main (data=<optimized out>) at gmain.c:5618
#5  0x00007fffee1c0ba5 in g_thread_proxy (data=0x29b12d0) at gthread.c:764
#6  0x00007fffed6ce0a5 in start_thread (arg=0x7fff64b8c700) at pthread_create.c:309
#7  0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7fff67fff700 (LWP 9349)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fff941db461 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fff941cc8e1 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fff941ccf7e in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fff941cd030 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fff941db3f6 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fff6d38d628 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
#7  0x00007fffed6ce0a5 in start_thread (arg=0x7fff67fff700) at pthread_create.c:309
#8  0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 12 (Thread 0x7fff6dfbf700 (LWP 9344)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7fff600010e0, timeout=-1, context=0x7f24d0) at gmain.c:4103
#2  g_main_context_iterate (context=0x7f24d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a492 in g_main_loop_run (loop=0x255c520) at gmain.c:4002
#4  0x00007ffff2d5a85d in operator() () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/glib/WorkQueueGLib.cpp:61
#5  0x00007ffff2d5b400 in _M_invoke () at /usr/include/c++/4.9/functional:2039
#6  0x00007ffff2809ae8 in operator() () at /usr/include/c++/4.9/functional:2439
#7  0x00007ffff2d1dc07 in threadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Threading.cpp:58
#8  0x00007ffff2d54be6 in wtfThreadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/ThreadingPthreads.cpp:167
#9  0x00007fffed6ce0a5 in start_thread (arg=0x7fff6dfbf700) at pthread_create.c:309
#10 0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 11 (Thread 0x7fff950b9700 (LWP 9335)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fff680010e0, timeout=-1, context=0x255acd0) at gmain.c:4103
#2  g_main_context_iterate (context=0x255acd0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a492 in g_main_loop_run (loop=0x255ae10) at gmain.c:4002
#4  0x00007ffff2d5a85d in operator() () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/glib/WorkQueueGLib.cpp:61
#5  0x00007ffff2d5b400 in _M_invoke () at /usr/include/c++/4.9/functional:2039
#6  0x00007ffff2809ae8 in operator() () at /usr/include/c++/4.9/functional:2439
#7  0x00007ffff2d1dc07 in threadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Threading.cpp:58
#8  0x00007ffff2d54be6 in wtfThreadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/ThreadingPthreads.cpp:167
#9  0x00007fffed6ce0a5 in start_thread (arg=0x7fff950b9700) at pthread_create.c:309
#10 0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7fff958ba700 (LWP 9334)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fff7c0010e0, timeout=-1, context=0x255a8b0) at gmain.c:4103
#2  g_main_context_iterate (context=0x255a8b0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a492 in g_main_loop_run (loop=0x25554e0) at gmain.c:4002
#4  0x00007ffff2d5a85d in operator() () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/glib/WorkQueueGLib.cpp:61
#5  0x00007ffff2d5b400 in _M_invoke () at /usr/include/c++/4.9/functional:2039
#6  0x00007ffff2809ae8 in operator() () at /usr/include/c++/4.9/functional:2439
#7  0x00007ffff2d1dc07 in threadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Threading.cpp:58
#8  0x00007ffff2d54be6 in wtfThreadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/ThreadingPthreads.cpp:167
#9  0x00007fffed6ce0a5 in start_thread (arg=0x7fff958ba700) at pthread_create.c:309
#10 0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7fff975ff700 (LWP 9325)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fff780010c0, timeout=-1, context=0xa1a320) at gmain.c:4103
#2  g_main_context_iterate (context=context@entry=0xa1a320, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a21c in g_main_context_iteration (context=context@entry=0xa1a320, may_block=may_block@entry=1) at gmain.c:3869
#4  0x00007fffdf83e4fd in dconf_gdbus_worker_thread (user_data=0xa1a320) at dconf-gdbus-thread.c:81
#5  0x00007fffee1c0ba5 in g_thread_proxy (data=0x763e80) at gthread.c:764
#6  0x00007fffed6ce0a5 in start_thread (arg=0x7fff975ff700) at pthread_create.c:309
#7  0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7fffdc831700 (LWP 9324)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fffee1de72f in g_cond_wait (cond=cond@entry=0x86bda8, mutex=mutex@entry=0x86bda0) at gthread-posix.c:1395
#2  0x00007fffee16ed5b in g_async_queue_pop_intern_unlocked (queue=queue@entry=0x86bda0, wait=wait@entry=1, end_time=end_time@entry=-1) at gasyncqueue.c:419
#3  0x00007fffee16f1c7 in g_async_queue_pop (queue=0x86bda0) at gasyncqueue.c:453
#4  0x0000000000490d03 in run_history_service_thread (self=0x7fc970) at ephy-history-service.c:522
#5  0x00007fffee1c0ba5 in g_thread_proxy (data=0x7fc990) at gthread.c:764
#6  0x00007fffed6ce0a5 in start_thread (arg=0x7fffdc831700) at pthread_create.c:309
#7  0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fffdd032700 (LWP 9323)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7fff800010e0, timeout=-1, context=0x815900) at gmain.c:4103
#2  g_main_context_iterate (context=0x815900, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a492 in g_main_loop_run (loop=0x780d40) at gmain.c:4002
#4  0x00007ffff2d5a85d in operator() () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/glib/WorkQueueGLib.cpp:61
#5  0x00007ffff2d5b400 in _M_invoke () at /usr/include/c++/4.9/functional:2039
#6  0x00007ffff2809ae8 in operator() () at /usr/include/c++/4.9/functional:2439
#7  0x00007ffff2d1dc07 in threadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Threading.cpp:58
#8  0x00007ffff2d54be6 in wtfThreadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/ThreadingPthreads.cpp:167
#9  0x00007fffed6ce0a5 in start_thread (arg=0x7fffdd032700) at pthread_create.c:309
#10 0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fffde835700 (LWP 9318)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=1, fds=0x7fff880010e0, timeout=-1, context=0x7e6200) at gmain.c:4103
#2  g_main_context_iterate (context=0x7e6200, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a492 in g_main_loop_run (loop=0x7e62c0) at gmain.c:4002
#4  0x00007ffff2d5a85d in operator() () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/glib/WorkQueueGLib.cpp:61
#5  0x00007ffff2d5b400 in _M_invoke () at /usr/include/c++/4.9/functional:2039
#6  0x00007ffff2809ae8 in operator() () at /usr/include/c++/4.9/functional:2439
#7  0x00007ffff2d1dc07 in threadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Threading.cpp:58
#8  0x00007ffff2d54be6 in wtfThreadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/ThreadingPthreads.cpp:167
#9  0x00007fffed6ce0a5 in start_thread (arg=0x7fffde835700) at pthread_create.c:309
#10 0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fffdf036700 (LWP 9317)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe8d11cac in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00007ffff2d173af in parkConditionally () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/ParkingLot.cpp:547
#3  0x00007ffff3e865fb in waitUntil<WTF::Lock> () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Condition.h:74
#4  0x00007ffff3e86341 in wait<WTF::Lock> () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Condition.h:113
#5  0x00007ffff47db60e in syncThreadMainLoop () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WebCore/loader/icon/IconDatabase.cpp:1433
#6  0x00007ffff47d98f7 in iconDatabaseSyncThread () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WebCore/loader/icon/IconDatabase.cpp:1035
#7  0x00007ffff47d972e in iconDatabaseSyncThreadStart () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WebCore/loader/icon/IconDatabase.cpp:956
#8  0x00007ffff2d1dd16 in operator() () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Threading.cpp:81
#9  0x00007ffff2d1decd in _M_invoke () at /usr/include/c++/4.9/functional:2039
#10 0x00007ffff2809ae8 in operator() () at /usr/include/c++/4.9/functional:2439
#11 0x00007ffff2d1dc07 in threadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/Threading.cpp:58
#12 0x00007ffff2d54be6 in wtfThreadEntryPoint () at /opt/gnome-os/tanty/epiphany/checkout/webkitgtk-2.10.7/Source/WTF/wtf/ThreadingPthreads.cpp:167
#13 0x00007fffed6ce0a5 in start_thread (arg=0x7fffdf036700) at pthread_create.c:309
#14 0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fffdf837700 (LWP 9315)):
#0  0x00007fffed3f184d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffee19a10c in g_main_context_poll (priority=2147483647, n_fds=2, fds=0x7fffd80010e0, timeout=-1, context=0x76f5a0) at gmain.c:4103
#2  g_main_context_iterate (context=0x76f5a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3803
#3  0x00007fffee19a492 in g_main_loop_run (loop=0x76f530) at gmain.c:4002
#4  0x00007fffee7b9a76 in gdbus_shared_thread_func (user_data=0x76f570) at gdbusprivate.c:274
#5  0x00007fffee1c0ba5 in g_thread_proxy (data=0x718ca0) at gthread.c:764
#6  0x00007fffed6ce0a5 in start_thread (arg=0x7fffdf837700) at pthread_create.c:309
#7  0x00007fffed3fbcfd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7ffff7f8ba00 (LWP 9066)):
#0  g_logv (log_domain=0x7ffff032c318 "Gtk", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7fffffffc5b0) at gmessages.c:1046
#1  0x00007fffee1a118f in g_log (log_domain=log_domain@entry=0x7ffff032c318 "Gtk", log_level=log_level@entry=G_LOG_LEVEL_CRITICAL, format=format@entry=0x7fffee20fffd "%s: assertion '%s' failed") at gmessages.c:1079
#2  0x00007fffee1a11c9 in g_return_if_fail_warning (log_domain=log_domain@entry=0x7ffff032c318 "Gtk", pretty_function=pretty_function@entry=0x7ffff03a59b0 <__FUNCTION__.63009> "gtk_widget_get_parent", expression=expression@entry=0x7ffff032c378 "GTK_IS_WIDGET (widget)") at gmessages.c:1088
#3  0x00007ffff02e3894 in gtk_widget_get_parent (widget=0x0) at gtkwidget.c:9596
#4  0x0000000000437d5e in tab_has_modified_forms_cb (view=0x2571940, result=0x2b96ac0, window=0x8e04e0) at ephy-window.c:2802
#5  0x00007fffee75f403 in g_task_return_now (task=0x2b96ac0) at gtask.c:1088
#6  0x00007fffee75fa9e in g_task_return (task=0x2b96ac0, type=<optimized out>) at gtask.c:1146
#7  0x000000000047e09f in has_modified_forms_cb (web_extension=0xb01b20, result=0x2b96b90, task=0x2b96ac0) at ephy-web-view.c:2632
#8  0x00007fffee75f403 in g_task_return_now (task=0x2b96b90) at gtask.c:1088
#9  0x00007fffee75fa9e in g_task_return (task=0x2b96b90, type=<optimized out>) at gtask.c:1146
#10 0x000000000047fa0d in has_modified_forms_cb (proxy=0x27a2e50, result=0x2abae30, task=0x2b96b90) at ephy-web-extension-proxy.c:202
#11 0x00007fffee74ee37 in g_simple_async_result_complete (simple=0x2abae30) at gsimpleasyncresult.c:763
#12 0x00007fffee7b6bc1 in reply_cb (connection=<optimized out>, res=<optimized out>, user_data=0x2abae30) at gdbusproxy.c:2623
#13 0x00007fffee74ee37 in g_simple_async_result_complete (simple=0x2abaf10) at gsimpleasyncresult.c:763
#14 0x00007fffee7abe32 in g_dbus_connection_call_done (source=<optimized out>, result=<optimized out>, user_data=0x2b9ea00) at gdbusconnection.c:5508
#15 0x00007fffee74ee37 in g_simple_async_result_complete (simple=0x7fffd8003350) at gsimpleasyncresult.c:763
#16 0x00007fffee74ee99 in complete_in_idle_cb (data=<optimized out>) at gsimpleasyncresult.c:775
#17 0x00007fffee199d9d in g_main_dispatch (context=0x724f00) at gmain.c:3122
#18 g_main_context_dispatch (context=context@entry=0x724f00) at gmain.c:3737
#19 0x00007fffee19a170 in g_main_context_iterate (context=context@entry=0x724f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3808
#20 0x00007fffee19a21c in g_main_context_iteration (context=0x724f00, context@entry=0x0, may_block=may_block@entry=1) at gmain.c:3869
#21 0x00007fffee78367c in g_application_run (application=0x7ca1d0, argc=<optimized out>, argv=0x7fffffffcbe8) at gapplication.c:2308
#22 0x000000000042f219 in main (argc=1, argv=0x7fffffffcbe8) at ephy-main.c:484
