1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Fuzzer/test/CustomCrossOverTest.cpp b/llvm/lib/Fuzzer/test/CustomCrossOverTest.cpp
index 2ab5781155f..b624088b902 100644
--- a/llvm/lib/Fuzzer/test/CustomCrossOverTest.cpp
+++ b/llvm/lib/Fuzzer/test/CustomCrossOverTest.cpp
@@ -15,10 +15,16 @@
 static const char *Separator = "-_^_-";
 static const char *Target = "012-_^_-abc";
 
+static volatile int sink;
+
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
   assert(Data);
   std::string Str(reinterpret_cast<const char *>(Data), Size);
 
+  // Ensure that two different elements exist in the corpus.
+  if (Size && Data[0] == '0') sink++;
+  if (Size && Data[0] == 'a') sink--;
+
   if (Str.find(Target) != std::string::npos) {
     std::cout << "BINGO; Found the target, exiting\n";
     exit(1);