D-Programming-Language/dmd — comment on commit 56276cb95b325402fbdfd7b4c283ff0c8e06f430
File:  line 0
By braddr:

The fail tests do detect compiler crashes as a failure of the test. Only the compiler exiting via a normal exit and with return code 1 is a 'successful' failure mode test. See test/d_do_test.d in the execute function.