Only emit rest param code for identifiers.

Destructuring of array binding and object binding patterns is not supported yet.

src/compiler/transformers/es6.ts

@@ -924,7 +924,7 @@ namespace ts {
          *                                          synthesized call to `super`
          */
         function shouldAddRestParameter(node: ParameterDeclaration, inConstructorWithSynthesizedSuper: boolean) {
-            return node && node.dotDotDotToken && !inConstructorWithSynthesizedSuper;
+            return node && node.dotDotDotToken && node.name.kind === SyntaxKind.Identifier && !inConstructorWithSynthesizedSuper;
         }
 
         /**
@@ -2746,4 +2746,4 @@ namespace ts {
             return isIdentifier(expression) && expression === parameter.name;
         }
     }
-}
+}