[libFuzzer] make sure to flush IO when done merging one file

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@317835 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/fuzzer/FuzzerMerge.cpp b/lib/fuzzer/FuzzerMerge.cpp
index 59e34cfa0..9b21a0917 100644
--- a/lib/fuzzer/FuzzerMerge.cpp
+++ b/lib/fuzzer/FuzzerMerge.cpp
@@ -254,6 +254,7 @@ void Fuzzer::CrashResistantMergeInternalStep(const std::string &CFPath) {
     for (size_t F : UniqFeatures)
       OF << " " << std::hex << F;
     OF << "\n";
+    OF.flush();
   }
 }