--- old/src/java.base/share/classes/jdk/internal/reflect/NativeConstructorAccessorImpl.java	2020-03-26 16:00:39.000000000 -0700
+++ new/src/java.base/share/classes/jdk/internal/reflect/NativeConstructorAccessorImpl.java	2020-03-26 16:00:38.000000000 -0700
@@ -25,9 +25,10 @@
 
 package jdk.internal.reflect;
 
-import java.lang.reflect.*;
 import sun.reflect.misc.ReflectUtil;
 
+import java.lang.reflect.*;
+
 /** Used only for the first few invocations of a Constructor;
     afterward, switches to bytecode-based implementation */
 
@@ -49,6 +50,7 @@
         // because that kind of class can't be referred to by name, hence can't
         // be found from the generated bytecode.
         if (++numInvocations > ReflectionFactory.inflationThreshold()
+                && !c.getDeclaringClass().isHiddenClass()
                 && !ReflectUtil.isVMAnonymousClass(c.getDeclaringClass())) {
             ConstructorAccessorImpl acc = (ConstructorAccessorImpl)
                 new MethodAccessorGenerator().