Fix missing exception check in typed array constructor (2).

This fixes another crash when the the typed array constructor accesses
an array that has a throwing accessor defined on one of it's elements.

R=verwaest@chromium.org
BUG=chromium:168545
TEST=mjsunit/regress/regress-crbug-168545.js

Review URL: https://codereview.chromium.org/11791052

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13351 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/d8.cc

@@ -561,7 +561,11 @@ Handle<Value> Shell::CreateExternalArray(const Arguments& args,
 
   if (init_from_array) {
     Handle<Object> init = args[0]->ToObject();
-    for (int i = 0; i < length; ++i) array->Set(i, init->Get(i));
+    for (int i = 0; i < length; ++i) {
+      Local<Value> value = init->Get(i);
+      if (try_catch.HasCaught()) return try_catch.ReThrow();
+      array->Set(i, value);
+    }
   }
 
   return array;

test/mjsunit/regress/regress-crbug-168545.js

@@ -28,3 +28,7 @@
 var o = {};
 Object.defineProperty(o, "length", { get: function() { throw "bail"; }});
 assertThrows("new Int16Array(o);");
+
+var a = [];
+Object.defineProperty(a, "0", { get: function() { throw "bail"; }});
+assertThrows("new Int16Array(a);");