[libFuzzer] improve error handling during the merge (handle various IO failures)

llvm-svn: 291182
diff --git a/llvm/lib/Fuzzer/FuzzerUtilWindows.cpp b/llvm/lib/Fuzzer/FuzzerUtilWindows.cpp
index 64adb7c..3ca1f2c 100644
--- a/llvm/lib/Fuzzer/FuzzerUtilWindows.cpp
+++ b/llvm/lib/Fuzzer/FuzzerUtilWindows.cpp
@@ -58,6 +58,7 @@
       if (HandlerOpt->HandleFpe)
         Fuzzer::StaticCrashSignalCallback();
       break;
+    // TODO: handle (Options.HandleXfsz)
   }
   return EXCEPTION_CONTINUE_SEARCH;
 }