Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/js/src/tests/test262/language/statements/for-in/head-let-destructuring.js b/js/src/tests/test262/language/statements/for-in/head-let-destructuring.js
new file mode 100644
index 0000000000..c9465b8b7a
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-in/head-let-destructuring.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-iteration-statements
+es6id: 13.7
+description: >
+  The token sequence `let [`is interpreted as the beginning of a destructuring
+  binding pattern
+info: |
+  Syntax
+
+  IterationStatement[Yield, Return]:
+
+    for ( [lookahead ∉ { let [ } ] LeftHandSideExpression[?Yield] in
+      Expression[+In, ?Yield] ) Statement[?Yield, ?Return]
+
+    for ( ForDeclaration[?Yield] in Expression[+In, ?Yield] )
+      Statement[?Yield, ?Return]
+---*/
+
+var obj = Object.create(null);
+var value;
+
+obj.key = 1;
+
+for ( let[x] in obj ) {
+  value = x;
+}
+
+assert.sameValue(typeof x, 'undefined', 'binding is block-scoped');
+assert.sameValue(value, 'k');
+
+reportCompare(0, 0);