Fixed a couple of failing DCHECK(has_pending_exception()).

test/mjsunit/regress/regress-crbug-491062.js

Index: test/mjsunit/regress/regress-crbug-491062.js
diff --git a/test/mjsunit/harmony/regress/regress-crbug-465671.js b/test/mjsunit/regress/regress-crbug-491062.js
similarity index 56%
copy from test/mjsunit/harmony/regress/regress-crbug-465671.js
copy to test/mjsunit/regress/regress-crbug-491062.js
index 24f4d054755bc241d87ad774787d595aad6c0657..e16f85b1eb87ac991fdcb65c7cc7527de807608a 100644
--- a/test/mjsunit/harmony/regress/regress-crbug-465671.js
+++ b/test/mjsunit/regress/regress-crbug-491062.js
@@ -2,15 +2,21 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-arrow-functions
+// Flags: --allow-natives-syntax --stack-limit=32
 
-// This used to trigger crash because of an unhandled stack overflow.
+function g() {}
+
+var count = 0;
 function f() {
-  var a = [10];
   try {
     f();
   } catch(e) {
-    a.map(v => v + 1);
+    print(e.stack);
+  }
+  if (count < 50) {
+    count++;
+    %DebugGetLoadedScripts();
   }
 }
 f();
+g();