[es6] Implement destructuring binding in try/catch

test/mjsunit/harmony/destructuring.js

Index: test/mjsunit/harmony/destructuring.js
diff --git a/test/mjsunit/harmony/destructuring.js b/test/mjsunit/harmony/destructuring.js
index 92cd7762604f17f0012efe793b4530251dd43b40..faf3a98a6232ab22f8be5f813f88e32996b86396 100644
--- a/test/mjsunit/harmony/destructuring.js
+++ b/test/mjsunit/harmony/destructuring.js
@@ -1107,3 +1107,30 @@
 (function TestDestructuringArrayWithoutInitializer() {
   assertThrows('var [foo]', TypeError);
 })();
+
+
+(function TestCatch() {
+  "use strict";
+
+  // For testing proper scoping.
+  var foo = "hello", bar = "world", baz = 42;
+
+  try {
+    throw {foo: 1, bar: 2};
+  } catch ({foo, bar, baz = 3}) {
+    assertEquals(1, foo);
+    assertEquals(2, bar);
+    assertEquals(3, baz);
+  }
+
+  try {
+    throw [1, 2, 3];
+  } catch ([foo, ...bar]) {
+    assertEquals(1, foo);
+    assertEquals([2, 3], bar);
+  }
+
+  assertEquals("hello", foo);
+  assertEquals("world", bar);
+  assertEquals(42, baz);
+})();