*** old/src/share/classes/java/lang/invoke/MethodTypeForm.java	Wed May 28 11:09:44 2014
--- new/src/share/classes/java/lang/invoke/MethodTypeForm.java	Wed May 28 11:09:44 2014

*** 89,100 ****
--- 89,102 ----
  
      public LambdaForm cachedLambdaForm(int which) {
          return lambdaForms[which];
      }
  
!     synchronized public LambdaForm setCachedLambdaForm(int which, LambdaForm form) {
!         // Should we perform some sort of CAS, to avoid racy duplication?
!         // Simulate a CAS, to avoid racy duplication of results.
+         LambdaForm prev = lambdaForms[which];
+         if (prev != null) return prev;
          return lambdaForms[which] = form;
      }
  
      public MethodHandle basicInvoker() {
          assert(erasedType == basicType) : "erasedType: " + erasedType + " != basicType: " + basicType;  // primitives must be flattened also