Index: compiler-rt/lib/fuzzer/FuzzerFork.cpp
===================================================================
--- compiler-rt/lib/fuzzer/FuzzerFork.cpp
+++ compiler-rt/lib/fuzzer/FuzzerFork.cpp
@@ -329,9 +329,9 @@
   };
 
   size_t JobId = 1;
-  Vector<std::thread> Threads;
+  Vector<std::thread> Threads(NumJobs);
   for (int t = 0; t < NumJobs; t++) {
-    Threads.push_back(std::thread(WorkerThread, &FuzzQ, &MergeQ));
+    Threads[t] = std::thread(WorkerThread, &FuzzQ, &MergeQ);
     FuzzQ.Push(Env.CreateNewJob(JobId++));
   }