--- a/src/hotspot/share/opto/callGenerator.cpp	Thu Jan 24 14:43:56 2019 +0100
+++ b/src/hotspot/share/opto/callGenerator.cpp	Thu Jan 24 08:44:26 2019 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -90,7 +90,6 @@
   // Grab signature for matching/allocation
 #ifdef ASSERT
   if (parser.tf() != (parser.depth() == 1 ? C->tf() : tf())) {
-    MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag);
     assert(C->env()->system_dictionary_modification_counter_changed(),
            "Must invalidate if TypeFuncs differ");
   }