Description of problem:
I had Calendar and Evolution open, and hid one of my google calendars in Evolution, and then Calendar crashed.

Version-Release number of selected component:
gnome-calendar-3.32.2-1.fc30

Additional info:
reporter:       libreport-2.10.0
backtrace_rating: 4
cmdline:        /usr/bin/gnome-calendar --gapplication-service
crash_function: gcal_manager_is_client_writable
executable:     /usr/bin/gnome-calendar
journald_cursor: s=931465fd223b444f90263d04c685a918;i=25aee5;b=7acf35e7615f4145b495404e12fa464f;m=1a476140a;t=58c1449705f15;x=9b4d7ae468d94e83
kernel:         5.1.12-300.fc30.x86_64
rootdir:        /
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (7 frames)
 #0 gcal_manager_is_client_writable at ../src/gcal-manager.c:1563
 #1 on_source_changed at ../src/gcal-quick-add-popover.c:537
 #6 g_cclosure_marshal_VOID__OBJECTv at ../gobject/gmarshal.c:1910
 #7 _g_closure_invoke_va at ../gobject/gclosure.c:873
 #10 source_registry_source_changed_idle_cb at /usr/src/debug/evolution-data-server-3.32.3-1.fc30.x86_64/src/libedataserver/e-source-registry.c:571
 #15 g_main_context_iteration at ../glib/gmain.c:3988
 #16 g_application_run at ../gio/gapplication.c:2516

Potential duplicate: bug 1573862