--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/MethodEmitter.java	Wed Jul 05 20:50:41 2017 +0200
+++ b/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/MethodEmitter.java	Sat Sep 19 16:04:28 2015 +0200
@@ -257,8 +257,7 @@
      */
     private Type popType(final Type expected) {
         final Type type = popType();
-        assert type.isObject() && expected.isObject() ||
-            type.isEquivalentTo(expected) : type + " is not compatible with " + expected;
+        assert type.isEquivalentTo(expected) : type + " is not compatible with " + expected;
         return type;
     }