1 files changed, 14 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/regress/regress-963891.js b/deps/v8/test/mjsunit/regress/regress-963891.js
new file mode 100644
index 0000000000..28bf920d1d
--- /dev/null
+++ b/deps/v8/test/mjsunit/regress/regress-963891.js
@@ -0,0 +1,14 @@
+// Copyright 2019 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
+
+var bar = true;
+bar = false;
+function foo() {
+  return !bar;
+}
+assertEquals(foo(), true);
+%OptimizeFunctionOnNextCall(foo);
+assertEquals(foo(), true);