Comment 7 for bug 1317427

Even better, with gobject symbols:

ERROR:/build/buildd/epiphany-browser-3.12.0/./embed/ephy-web-view.c:684:form_auth_data_save_requested: assertion failed: (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (web_view)) == page_id)

Program received signal SIGABRT, Aborted.
0x00007ffff12cef79 in raise () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt full
#0 0x00007ffff12cef79 in raise () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1 0x00007ffff12d2388 in abort () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#2 0x00007ffff1f12175 in g_assertion_message (domain=domain@entry=0x0,
    file=file@entry=0x4901f0 "/build/buildd/epiphany-browser-3.12.0/./embed/ephy-web-view.c", line=line@entry=684,
    func=func@entry=0x490a70 <__FUNCTION__.61816> "form_auth_data_save_requested",
    message=message@entry=0x30ec390 "assertion failed: (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (web_view)) == page_id)")
    at /build/buildd/glib2.0-2.40.0/./glib/gtestutils.c:2291
        lstr = "684\000\377\177\000\000`\331\377\377\377\177\000\000\060\333\377\377\377\177\000\000\250\001I\000\000\000\000"
        s = 0x37182a0 "@\370h\003"
#3 0x00007ffff1f1220a in g_assertion_message_expr (domain=domain@entry=0x0,
    file=file@entry=0x4901f0 "/build/buildd/epiphany-browser-3.12.0/./embed/ephy-web-view.c", line=line@entry=684,
    func=func@entry=0x490a70 <__FUNCTION__.61816> "form_auth_data_save_requested",
    expr=expr@entry=0x4901a8 "webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (web_view)) == page_id")
    at /build/buildd/glib2.0-2.40.0/./glib/gtestutils.c:2306
        s = 0x30ec390 "assertion failed: (webkit_web_view_get_page_id (WEBKIT_WEB_VIEW (web_view)) == page_id)"
#4 0x0000000000463098 in form_auth_data_save_requested (web_extension=<optimised out>, request_id=1, page_id=213,
    hostname=0x3a72820 "disqus.com", username=<optimised out>, web_view=0x1cee060)
    at /build/buildd/epiphany-browser-3.12.0/./embed/ephy-web-view.c:684
        page_id = 213
        username = <optimised out>
        web_view = 0x1cee060
        web_extension = <optimised out>
        request_id = 1
        hostname = 0x3a72820 "disqus.com"
        info_bar = 0xd5
        data = <optimised out>
#5 0x00007fffe8cadadc in ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#6 0x00007fffe8cad40c in ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
No symbol table info available.
#7 0x00007ffff21bdbf8 in g_cclosure_marshal_generic (closure=0xc44d20, return_gvalue=0x0, n_param_values=<optimised out>,
    param_values=<optimised out>, invocation_hint=<optimised out>, marshal_data=0x0)
    at /build/buildd/glib2.0-2.40.0/./gobject/gclosure.c:1445
        rtype = <optimised out>
        rvalue = 0x7fffffffdbc0
        n_args = 6
        atypes = <optimised out>
        i = <optimised out>
        cif = {abi = FFI_UNIX64, nargs = 6, arg_types = 0x7fffffffdb80, rtype = 0x7fffe8caded0 <ffi_type_void>, bytes = 0,
          flags = 0}
        cc = 0xc44d20
        enum_tmpval = <optimised out>
        tmpval_used = 0
#8 0x00007ffff21bd3b8 in g_closure_invoke (closure=0xc44d20, return_value=0x0, n_param_values=5, param_values=0x7fffffffde50,
    invocation_hint=0x7fffffffddf0) at /build/buildd/glib2.0-2.40.0/./gobject/gclosure.c:768
        marshal = 0x7ffff21bda00 <g_cclosure_marshal_generic>
        marshal_data = 0x0
        in_marshal = 0
        real_closure = 0xc44d00
        __FUNCTION__ = "g_closure_invoke"
#9 0x00007ffff21ced3d in signal_emit_unlocked_R (node=node@entry=0x84f8c0, detail=detail@entry=0,
    instance=instance@entry=0x94e0e0, emission_return=emission_return@entry=0x0,
    instance_and_params=instance_and_params@entry=0x7fffffffde50) at /build/buildd/glib2.0-2.40.0/./gobject/gsignal.c:3551
        tmp = <optimised out>
        handler = 0xd7c150
        accumulator = 0x0
        emission = {next = 0x0, instance = 0x94e0e0, ihint = {signal_id = 220, detail = 0, run_type = G_SIGNAL_RUN_FIRST},
          state = EMISSION_RUN, chain_type = 4}
        handler_list = 0xd7c150
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0,
              v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0,
              v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 220
        max_sequential_handler_number = 75062
        return_value_altered = 0
#10 0x00007ffff21d6a29 in g_signal_emit_valist (instance=<optimised out>, signal_id=<optimised out>, detail=<optimised out>,
    var_args=var_args@entry=0x7fffffffe038) at /build/buildd/glib2.0-2.40.0/./gobject/gsignal.c:3307
        instance_and_params = 0x7fffffffde50
        signal_return_type = <optimised out>
        param_values = 0x7fffffffde68
        i = <optimised out>
        n_params = <optimised out>
        __FUNCTION__ = "g_signal_emit_valist"
#11 0x00007ffff21d6ce2 in g_signal_emit (instance=instance@entry=0x94e0e0, signal_id=<optimised out>, detail=detail@entry=0)
    at /build/buildd/glib2.0-2.40.0/./gobject/gsignal.c:3363
        var_args = {{gp_offset = 48, fp_offset = 48, overflow_arg_area = 0x7fffffffe118, reg_save_area = 0x7fffffffe050}}
#12 0x0000000000466c66 in ephy_web_extension_proxy_form_auth_save_requested (web_extension=0x94e0e0, request_id=1, page_id=213,
    hostname=0x3338410 "disqus.com", username=0x333841b "mjog")
    at /build/buildd/epiphany-browser-3.12.0/./embed/ephy-web-extension-proxy.c:195
        __FUNCTION__ = "ephy_web_extension_proxy_form_auth_save_requested"
#13 0x000000000045ddda in web_extension_form_auth_save_requested (connection=<optimised out>,
    sender_name=0x7fffdc01ba30 ":1.1542", object_path=<optimised out>, interface_name=<optimised out>,
    signal_name=<optimised out>, parameters=<optimised out>, shell=0x89d180)
    at /build/buildd/epiphany-browser-3.12.0/./embed/ephy-embed-shell.c:148
        web_extension = <optimised out>
        request_id = 1
        page_id = 213
        hostname = 0x3338410 "disqus.com"
        username = 0x333841b "mjog"
#14 0x00007ffff24c16c5 in emit_signal_instance_in_idle_cb (data=0x7fffdc003d50)
    at /build/buildd/glib2.0-2.40.0/./gio/gdbusconnection.c:3750
        signal_instance = 0x7fffdc003d50
        parameters = 0x3efc0c0
        has_subscription = 1
#15 0x00007ffff1eedce5 in g_main_dispatch (context=0x70f410) at /build/buildd/glib2.0-2.40.0/./glib/gmain.c:3064
        dispatch = 0x7ffff1eeabc0 <g_idle_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x7fffdc003d50
        callback = 0x7ffff24c1650 <emit_signal_instance_in_idle_cb>
        cb_funcs = 0x7ffff21ab920 <g_source_callback_funcs>
        cb_data = 0x7fffdc002af0
        need_destroy = <optimised out>
        source = 0x7fffdc005800
        current = 0x748590
        i = 0
#16 g_main_context_dispatch (context=context@entry=0x70f410) at /build/buildd/glib2.0-2.40.0/./glib/gmain.c:3663
No locals.
#17 0x00007ffff1eee048 in g_main_context_iterate (context=context@entry=0x70f410, block=block@entry=1, dispatch=dispatch@entry=1,
    self=<optimised out>) at /build/buildd/glib2.0-2.40.0/./glib/gmain.c:3734
        max_priority = 2147483647
        timeout = 11
        some_ready = 1
        nfds = <optimised out>
        allocated_nfds = 4
        fds = 0x724a70
#18 0x00007ffff1eee0ec in g_main_context_iteration (context=0x70f410, context@entry=0x0, may_block=may_block@entry=1)
    at /build/buildd/glib2.0-2.40.0/./glib/gmain.c:3795
        retval = <optimised out>
#19 0x00007ffff24a067c in g_application_run (application=0x89d180, argc=argc@entry=1, argv=argv@entry=0x7fffffffe438)
    at /build/buildd/glib2.0-2.40.0/./gio/gapplication.c:2114
        arguments = 0x7d4e60
        status = 0
        __FUNCTION__ = "g_application_run"
#20 0x000000000042dd62 in main (argc=1, argv=0x7fffffffe438) at /build/buildd/epiphany-browser-3.12.0/./src/ephy-main.c:488
        option_context = <optimised out>
        option_group = <optimised out>
        error = 0x0
        user_time = <optimised out>
        arbitrary_url = <optimised out>
        ctx = <optimised out>
        startup_flags = <optimised out>
        mode = <optimised out>
        ephy_shell = 0x89d180
        status = <optimised out>
        flags = <optimised out>