Throw error if new.target is like new.foo

test/mocha/new.js

@@ -85,4 +85,11 @@ describe("New", function() {
             );
         }
     });
+
+    it("Should check target in new.target", function() {
+        assert.throws(function() {uglify.parse("new.blah")}, function(e) {
+            return e instanceof uglify.JS_Parse_Error
+                && e.message === "SyntaxError: Unexpected token name «blah», expected name «target»";
+        });
+    });
 });