I rebuilt the package with debugging symbols. More detailed backtrace:
#0 mn_mail_icon_set_tip_widget (self=0x0, tip_widget=0x7fb4ac003c60 [GtkVBox])
at src/mn-mail-icon.gob:292
#1 0x0000000000426c66 in mn_shell_update_tooltip (self=0x2304760 [MNShell]) at
src/mn-shell.gob:713
#2 0x00007fb4d8ca2fa5 in g_closure_invoke (closure=0x22e4da0,
return_value=return_value@entry=0x7fffc083bf30, n_param_values=1,
param_values=param_values@entry=0x7fffc083bf10,
invocation_hint=invocation_hint@entry=0x7fffc083bdf0)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gclosure.c:804
#3 0x00007fb4d8cb4fc1 in signal_emit_unlocked_R (node=node@entry=0x228b470,
detail=detail@entry=0, instance=instance@entry=0x2330320,
emission_return=emission_return@entry=0x7fffc083bf30,
instance_and_params=instance_and_params@entry=0x7fffc083bf10)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gsignal.c:3629
#4 0x00007fb4d8cbcd41 in g_signal_emitv
(instance_and_params=instance_and_params@entry=0x7fffc083bf10,
signal_id=<optimized out>, detail=detail@entry=0,
return_value=return_value@entry=0x7fffc083bf30) at
/build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gsignal.c:3123
#5 0x000000000042220b in mn_mailboxes_error_changed (self=0x2330320
[MNMailboxes]) at mn-mailboxes.c:915
#6 0x00007fb4d8ca2fa5 in g_closure_invoke (closure=0x22b2450,
return_value=return_value@entry=0x0, n_param_values=2,
param_values=param_values@entry=0x7fffc083c120,
invocation_hint=invocation_hint@entry=0x7fffc083c0a0) at
/build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gclosure.c:804
#7 0x00007fb4d8cb4fc1 in signal_emit_unlocked_R (node=node@entry=0x213ab10,
detail=detail@entry=85, instance=instance@entry=0x23ac0d0,
emission_return=emission_return@entry=0x0,
instance_and_params=instance_and_params@entry=0x7fffc083c120)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gsignal.c:3629
#8 0x00007fb4d8cbdd5c in g_signal_emit_valist (instance=<optimized out>,
signal_id=<optimized out>, detail=<optimized out>,
var_args=var_args@entry=0x7fffc083c2e0)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gsignal.c:3385
#9 0x00007fb4d8cbe08f in g_signal_emit (instance=instance@entry=0x23ac0d0,
signal_id=<optimized out>, detail=<optimized out>)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gsignal.c:3441
#10 0x00007fb4d8ca74d4 in g_object_dispatch_properties_changed
(object=0x23ac0d0 [MNGmailMailbox], n_pspecs=<optimized out>, pspecs=<optimized
out>)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gobject.c:1062
#11 0x00007fb4d8ca6d88 in g_object_notify_queue_thaw
(object=object@entry=0x23ac0d0 [MNGmailMailbox],
nqueue=nqueue@entry=0x7fb4b40334c0)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gobject.c:296
#12 0x00007fb4d8caa7fd in g_object_set_valist (object=object@entry=0x23ac0d0
[MNGmailMailbox], first_property_name=first_property_name@entry=0x44e6fc
"error",
var_args=var_args@entry=0x7fffc083c5b0) at
/build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gobject.c:2171
#13 0x00007fb4d8caafcc in g_object_set (_object=_object@entry=0x23ac0d0,
first_property_name=first_property_name@entry=0x44e6fc "error")
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./gobject/gobject.c:2275
#14 0x000000000041cf4a in mn_mailbox_set_error (self=self@entry=0x23ac0d0
[MNGmailMailbox], format=format@entry=0x0) at src/mn-mailbox.gob:518
#15 0x000000000043c031 in ___9_mn_authenticated_mailbox_check
(mailbox=0x23ac0d0 [MNGmailMailbox]) at src/mn-authenticated-mailbox.gob:218
#16 0x000000000041bc45 in mn_mailbox_check (self=<optimized out>) at
mn-mailbox.c:2210
#17 mn_mailbox_check_timeout_cb (data=<optimized out>) at
src/mn-mailbox.gob:1040
#18 0x00007fb4db9d94e8 in gdk_threads_dispatch (data=0x22d46e0,
data@entry=<error reading variable: value has been optimized out>)
at /build/gtk+3.0-fILMXm/gtk+3.0-3.18.9/./gdk/gdk.c:719
#19 0x00007fb4d89cca53 in g_timeout_dispatch (source=0x2245b70,
callback=<optimized out>, user_data=<optimized out>)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:4577
#20 0x00007fb4d89cbfea in g_main_dispatch (context=0x213c540) at
/build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3154
#21 g_main_context_dispatch (context=context@entry=0x213c540) at
/build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3769
#22 0x00007fb4d89cc390 in g_main_context_iterate (context=0x213c540,
block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
at /build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:3840
#23 0x00007fb4d89cc6b2 in g_main_loop_run (loop=0x22e4f30) at
/build/glib2.0-2CrUwg/glib2.0-2.48.0/./glib/gmain.c:4034
#24 0x00007fb4dbe92ed5 in gtk_main () at
/build/gtk+3.0-fILMXm/gtk+3.0-3.18.9/./gtk/gtkmain.c:1241
#25 0x0000000000418b89 in main (argc=1, argv=0x7fffc083cc68) at
src/mn-main.c:546
