src/java.base/share/classes/java/lang/invoke/StringConcatFactory.java

@@ -1132,11 +1132,11 @@
                    .return_();
              }
          };
  
          static final ReferencedKeyMap<MethodType, SoftReference<MethodHandlePair>> CACHE =
-                 ReferencedKeyMap.create(true, true,
+                 ReferencedKeyMap.create(true,
                          new Supplier<>() {
                              @Override
                              public Map<ReferenceKey<MethodType>, SoftReference<MethodHandlePair>> get() {
                                  return new ConcurrentHashMap<>(64);
                              }