Index: lib/Support/ManagedStatic.cpp
===================================================================
--- lib/Support/ManagedStatic.cpp
+++ lib/Support/ManagedStatic.cpp
@@ -77,8 +77,13 @@
 
 /// llvm_shutdown - Deallocate and destroy all ManagedStatic variables.
 void llvm::llvm_shutdown() {
-  MutexGuard Lock(*getManagedStaticMutex());
+  {
+    MutexGuard Lock(*getManagedStaticMutex());
+
+    while (StaticList)
+      StaticList->destroy();
+  }
 
-  while (StaticList)
-    StaticList->destroy();
+  delete ManagedStaticMutex;
+  ManagedStaticMutex = nullptr;
 }