--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassReader.java	Mon Nov 06 13:10:43 2017 +0100
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassReader.java	Mon Nov 06 14:10:39 2017 +0100
@@ -2555,6 +2555,8 @@
     }
 
     protected ClassSymbol enterClass(Name name) {
+        if (syms.proprietaryType.tsym.flatName() == name)
+            return (ClassSymbol) syms.proprietaryType.tsym;
         return syms.enterClass(currentModule, name);
     }