fix memory leak in libfuzzer custom mutator
@@ -1086,6 +1086,7 @@ ATTRIBUTE_INTERFACE size_t LLVMFuzzerMutate(uint8_t *Data, size_t Size,
size_t MaxSize) {
assert(fuzzer::F);
+ fuzzer::F->GetMD().StartMutationSequence();
size_t r = fuzzer::F->GetMD().DefaultMutate(Data, Size, MaxSize);
#ifdef INTROSPECTION
introspection_ptr = fuzzer::F->GetMD().WriteMutationSequence();
