StacktraceTop: g_type_check_instance_cast () from /tmp/apport_sandbox_60dy6K/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 GCAL_SOURCE_DIALOG (ptr=0xd63c00) at gcal-source-dialog.h:36 add_source (manager=<optimized out>, source=0x7f00a80628a0, enabled=<optimized out>, user_data=0xd63c00) at gcal-source-dialog.c:283 ffi_call_unix64 () from /tmp/apport_sandbox_60dy6K/usr/lib/x86_64-linux-gnu/libffi.so.6 ffi_call () from /tmp/apport_sandbox_60dy6K/usr/lib/x86_64-linux-gnu/libffi.so.6
StacktraceTop: check_instance_ cast () from /tmp/apport_ sandbox_ 60dy6K/ usr/lib/ x86_64- linux-gnu/ libgobject- 2.0.so. 0 dialog. h:36 0x7f00a80628a0, enabled=<optimized out>, user_data=0xd63c00) at gcal-source- dialog. c:283 sandbox_ 60dy6K/ usr/lib/ x86_64- linux-gnu/ libffi. so.6 sandbox_ 60dy6K/ usr/lib/ x86_64- linux-gnu/ libffi. so.6
g_type_
GCAL_SOURCE_DIALOG (ptr=0xd63c00) at gcal-source-
add_source (manager=<optimized out>, source=
ffi_call_unix64 () from /tmp/apport_
ffi_call () from /tmp/apport_