[libFuzzer] fail if the corpus dir does not exist
llvm-svn: 259454
diff --git a/llvm/lib/Fuzzer/test/fuzzer.test b/llvm/lib/Fuzzer/test/fuzzer.test
index 5754058..86ef32a 100644
--- a/llvm/lib/Fuzzer/test/fuzzer.test
+++ b/llvm/lib/Fuzzer/test/fuzzer.test
@@ -42,3 +42,6 @@
RUN: LLVMFuzzer-SimpleCmpTest -seed=-1 -runs=0 2>&1 | FileCheck %s --check-prefix=CHECK_SEED_MINUS_ONE
CHECK_SEED_MINUS_ONE: Seed: 4294967295
+
+RUN: not LLVMFuzzer-SimpleTest NONEXISTENT_DIR 2>&1 | FileCheck %s --check-prefix=NONEXISTENT_DIR
+NONEXISTENT_DIR: No such directory: NONEXISTENT_DIR; exiting