; Test that not specifying a stderr file isn't broken.
RUN: unset AFL_DRIVER_STDERR_DUPLICATE_FILENAME
RUN: AFLDriverTest

; Test that specifying an invalid file causes a crash.
RUN: ASAN_OPTIONS= AFL_DRIVER_STDERR_DUPLICATE_FILENAME="%T" not --crash AFLDriverTest

; Test that a file is created when specified as the duplicate stderr.
RUN: AFL_DRIVER_STDERR_DUPLICATE_FILENAME=%t AFLDriverTest
RUN: stat %t