Don't SEGV in the signal handler in a unit test.
Don't SEGV in the signal handler in a unit test.

Change-Id: Id441b096a145c630915c71e06338f33b447b008d

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst