Comment 16 for bug 1420431

Maya calendar closes the moment I open it, too. Fresh Elementary (Loki) install. Calendar opened and stayed opened until I configured a Google account with app password. Backtrace follows:

Starting program: /usr/bin/maya-calendar
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe1103700 (LWP 4861)]
[New Thread 0x7fffdbfff700 (LWP 4862)]
[INFO 22:22:34.036514] Application.vala:155: Calendar version: 0.4.0.2
[INFO 22:22:34.036554] Application.vala:157: Kernel version: 4.4.0-66-generic
[New Thread 0x7fffd9a09700 (LWP 4864)]
[New Thread 0x7fffd9208700 (LWP 4865)]
[New Thread 0x7fffd8a07700 (LWP 4866)]
[New Thread 0x7fffcbddb700 (LWP 4867)]
[WARNING 22:22:34.152940] [e-data-server] e_module_load_all_in_directory: Error opening directory '/usr/lib/evolution-data-server/credential-modules': No such file or directory
[New Thread 0x7fffc9d46700 (LWP 4868)]
[New Thread 0x7fffc950e700 (LWP 4876)]
[FATAL 22:22:34.320211] maya_util_is_all_day: assertion 'dtend != NULL' failed
[FATAL 22:22:34.320332] [GLib] g_date_time_format: assertion 'datetime != NULL' failed

Thread 1 "maya-calendar" received signal SIGSEGV, Segmentation fault.
0x00007ffff52dc87c in g_date_time_to_timezone ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
(gdb) bt
#0 0x00007ffff52dc87c in g_date_time_to_timezone ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1 0x00007ffff509c439 in maya_util_is_multiday_event ()
   from /usr/lib/x86_64-linux-gnu/libmaya-calendar.so.0
#2 0x0000555555568740 in maya_view_agenda_view_agenda_event_row_update ()
#3 0x0000555555568ec8 in maya_view_agenda_view_agenda_event_row_construct ()
#4 0x0000555555569d54 in ?? ()
#5 0x00007ffff55c8fa5 in g_closure_invoke ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6 0x00007ffff55dafc1 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7 0x00007ffff55e3d5c in g_signal_emit_valist ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0