Index: lib/sanitizer_common/tests/sanitizer_thread_registry_test.cc
===================================================================
--- lib/sanitizer_common/tests/sanitizer_thread_registry_test.cc
+++ lib/sanitizer_common/tests/sanitizer_thread_registry_test.cc
@@ -224,6 +224,10 @@
 }
 
 TEST(SanitizerCommon, ThreadRegistryThreadedTest) {
+  memset(&num_created, 0, sizeof(num_created));
+  memset(&num_started, 0, sizeof(num_created));
+  memset(&num_joined, 0, sizeof(num_created));
+
   ThreadRegistry registry(GetThreadContext<TestThreadContext>,
                           kThreadsPerShard * kNumShards + 1, 10);
   ThreadedTestRegistry(&registry);