Throw error if new.target is like new.foo

lib/parse.js

@@ -1448,7 +1448,7 @@ function parse($TEXT, options) {
         expect_token("operator", "new");
         if (is("punc", ".")) {
             next();
-            expect_token("name");
+            expect_token("name", "target");
             return subscripts(new AST_NewTarget({
                 start : start,
                 end   : prev()

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»";
+        });
+    });
 });