dart:mirrors

lib/runtime/harmony_feature_check.js

Index: lib/runtime/harmony_feature_check.js
diff --git a/lib/runtime/harmony_feature_check.js b/lib/runtime/harmony_feature_check.js
index c2f80e44dd5139a6e15d73f3cb1a0397194c46b5..33003066a1adccae5b61aba04b37e7144633fb06 100644
--- a/lib/runtime/harmony_feature_check.js
+++ b/lib/runtime/harmony_feature_check.js
@@ -10,8 +10,9 @@
       'class C {' +
         'constructor(x) { this.x = x; };' +
         '["foo"]() { return x => this.x + x; };' +
+	'bar(args) { return this.foo()(...args); };' +
       '};' +
-      'return new C(42).foo()(100);');
+      'return new C(42).bar([100]);');
     if (f() == 142) return; // supported!
   } catch (e) {
   }
@@ -19,7 +20,8 @@
   var message = 'This script needs EcmaScript 6 features ' +
       'like `class` and `=>`. Please run in a browser with support, ' +
       'for example: chrome --js-flags="--harmony-arrow-functions' +
-      ' --harmony-classes --harmony-computed-property-names"';
+      ' --harmony-classes --harmony-computed-property-names' +
+      ' --harmony-spreadcalls"';
   console.error(message);
   alert(message);