Version 4.4.63.12 (cherry-pick)

src/runtime/runtime-typedarray.cc

Index: src/runtime/runtime-typedarray.cc
diff --git a/src/runtime/runtime-typedarray.cc b/src/runtime/runtime-typedarray.cc
index 10aba0cc42468614e48757e609b8788049171a65..fed6795509c83493e43f8ec5146a2f69cb27914b 100644
--- a/src/runtime/runtime-typedarray.cc
+++ b/src/runtime/runtime-typedarray.cc
@@ -27,15 +27,15 @@ void Runtime::SetupArrayBuffer(Isolate* isolate,
   array_buffer->set_is_external(is_external);
   array_buffer->set_is_neuterable(true);
 
-  Handle<Object> byte_length =
-      isolate->factory()->NewNumberFromSize(allocated_length);
-  CHECK(byte_length->IsSmi() || byte_length->IsHeapNumber());
-  array_buffer->set_byte_length(*byte_length);
-
   if (data && !is_external) {
     isolate->heap()->RegisterNewArrayBuffer(
         isolate->heap()->InNewSpace(*array_buffer), data, allocated_length);
   }
+
+  Handle<Object> byte_length =
+      isolate->factory()->NewNumberFromSize(allocated_length);
+  CHECK(byte_length->IsSmi() || byte_length->IsHeapNumber());
+  array_buffer->set_byte_length(*byte_length);
 }