diff -r 0665a966cac6 -r f8ebefc29b79 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	Fri Jul 06 13:45:41 2018 -0700
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/processing/JavacProcessingEnvironment.java	Fri Jul 06 12:10:43 2018 -0700
@@ -1179,7 +1179,9 @@
                         cs.reset();
                         cs.classfile = file;
                         cs.completer = initialCompleter;
-                        cs.owner.members().enter(cs); //XXX - OverwriteBetweenCompilations; syms.getClass is not sufficient anymore
+                        if (cs.owner.kind == PCK) {
+                            cs.owner.members().enter(cs); //XXX - OverwriteBetweenCompilations; syms.getClass is not sufficient anymore
+                        }
                     }
                     list = list.prepend(cs);
                 }