Reviewers: danno,

Message:
PTAL.

Description:
Runtime assert added to %NormalizeElements.

BUG=399654
LOG=N

Please review this at https://codereview.chromium.org/423073007/

SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge

Affected files (+2, -0 lines):
  M src/runtime.cc


Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 18ac790bb6ccf18613648bd1e3e1f4acd3bbc2c8..c82592a13f89bd1723377221a3b1c5ee245234dd 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -15092,6 +15092,8 @@ RUNTIME_FUNCTION(Runtime_NormalizeElements) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, array, 0);
+  RUNTIME_ASSERT(!array->HasExternalArrayElements() &&
+                 !array->HasFixedTypedArrayElements());
   JSObject::NormalizeElements(array);
   return *array;
 }


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