1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for/scope-head-lex-open.js b/js/src/tests/test262/language/statements/for/scope-head-lex-open.js
new file mode 100644
index 0000000000..5d60618fa3
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for/scope-head-lex-open.js
@@ -0,0 +1,41 @@
+// 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-for-statement-runtime-semantics-labelledevaluation
+description: Creation of new lexical environment for the statement "head"
+info: |
+    [...]
+    2. Let loopEnv be NewDeclarativeEnvironment(oldEnv).
+    3. Let loopEnvRec be loopEnv's EnvironmentRecord.
+    4. Let isConst be the result of performing IsConstantDeclaration of
+       LexicalDeclaration.
+    5. Let boundNames be the BoundNames of LexicalDeclaration.
+    6. For each element dn of boundNames do
+       a. If isConst is true, then
+          i. Perform ! loopEnvRec.CreateImmutableBinding(dn, true).
+       b. Else,
+          i. Perform ! loopEnvRec.CreateMutableBinding(dn, false).
+    7. Set the running execution context's LexicalEnvironment to loopEnv.
+    [...]
+features: [let]
+---*/
+
+let x = 'outside';
+var probeBefore = function() { return x; };
+var probeDecl, probeTest, probeIncr, probeBody;
+var run = true;
+
+for (
+    let x = 'inside', _ = probeDecl = function() { return x; };
+    run && (probeTest = function() { return x; });
+    probeIncr = function() { return x; }
+  )
+  probeBody = function() { return x; }, run = false;
+
+assert.sameValue(probeBefore(), 'outside');
+assert.sameValue(probeDecl(), 'inside', 'reference from LexicalDeclaration');
+assert.sameValue(probeTest(), 'inside', 'reference from "test" position');
+assert.sameValue(probeBody(), 'inside', 'reference from statement body');
+assert.sameValue(probeIncr(), 'inside', 'reference from "increment" position');
+
+reportCompare(0, 0);