1 files changed, 24 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/regress/regress-897512.js b/deps/v8/test/mjsunit/regress/regress-897512.js
new file mode 100644
index 0000000000..0e676a06c2
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-897512.js
@@ -0,0 +1,24 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Fill up the Array prototype's elements.
+for (let i = 0; i < 100; i++) Array.prototype.unshift(3.14);
+
+// Create a holey double elements array.
+const o31 = [1.1];
+o31[37] = 2.2;
+
+// Concat converts to dictionary elements.
+const o51 = o31.concat(false);
+
+// Set one element to undefined to trigger the movement bug.
+o51[0] = undefined;
+
+assertEquals(o51.length, 39);
+
+// Sort triggers the bug.
+o51.sort();
+
+// TODO(chromium:897512): The length should be 39.
+assertEquals(o51.length, 101);