1 files changed, 26 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/compiler/deopt-array-prototype-find.js b/deps/v8/test/mjsunit/compiler/deopt-array-prototype-find.js
new file mode 100644
index 0000000000..e8b5b9bd1b
--- /dev/null
+++ b/deps/v8/test/mjsunit/compiler/deopt-array-prototype-find.js
@@ -0,0 +1,26 @@
+// 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.
+
+// Flags: --allow-natives-syntax --opt
+
+/* Test deopt behaviors when the prototype has elements */
+
+// find
+
+(function () {
+  var array = [,];
+
+  function find() {
+    return array.find(v => v > 0);
+  }
+
+  find(); find();
+
+  %OptimizeFunctionOnNextCall(find);
+  assertEquals(find(), undefined);
+
+  array.__proto__.push(6);
+  // deopt
+  assertEquals(find(), 6);
+})();