diff -r cb4b07d61aac -r e84038f37713 src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java
--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java	Thu Jun 28 09:15:53 2018 +0200
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java	Thu Jun 28 10:05:39 2018 +0200
@@ -1282,7 +1282,9 @@
                 for (ClassSymbol cs : symtab.getAllClasses()) {
                     if (cs.classfile != null || cs.kind == ERR) {
                         cs.reset();
-                        cs.type = new ClassType(cs.type.getEnclosingType(), null, cs);
+                        if (cs.kind == ERR) {
+                            cs.type = new ClassType(cs.type.getEnclosingType(), null, cs);
+                        }
                         if (cs.isCompleted()) {
                             cs.completer = initialCompleter;
                         }