src/share/classes/com/sun/tools/javac/comp/Attr.java

@@ -4007,12 +4007,11 @@
                     log.error(env.tree.pos(), "enum.no.subclassing");
 
                 // Enums may not be extended by source-level classes
                 if (st.tsym != null &&
                     ((st.tsym.flags_field & Flags.ENUM) != 0) &&
-                    ((c.flags_field & (Flags.ENUM | Flags.COMPOUND)) == 0) &&
-                    !target.compilerBootstrap(c)) {
+                    ((c.flags_field & (Flags.ENUM | Flags.COMPOUND)) == 0)) {
                     log.error(env.tree.pos(), "enum.types.not.extensible");
                 }
                 attribClassBody(env, c);
 
                 chk.checkDeprecatedAnnotation(env.tree.pos(), c);