1 files changed, 19 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/compiler/regress-truncate-number-or-undefined-to-float64.js b/deps/v8/test/mjsunit/compiler/regress-truncate-number-or-undefined-to-float64.js
new file mode 100644
index 0000000000..1dc3042ea7
--- /dev/null
+++ b/deps/v8/test/mjsunit/compiler/regress-truncate-number-or-undefined-to-float64.js
@@ -0,0 +1,19 @@
+// Copyright 2016 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
+
+function g(a, b) {
+  a = +a;
+  if (b) {
+    a = undefined;
+  }
+  print(a);
+  return +a;
+}
+
+g(0);
+g(0);
+%OptimizeFunctionOnNextCall(g);
+assertTrue(Number.isNaN(g(0, true)));