1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/switch/scope-lex-close-dflt.js b/js/src/tests/test262/language/statements/switch/scope-lex-close-dflt.js
new file mode 100644
index 0000000000..e46fae794e
--- /dev/null
+++ b/js/src/tests/test262/language/statements/switch/scope-lex-close-dflt.js
@@ -0,0 +1,48 @@
+// 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-switch-statement-runtime-semantics-evaluation
+description: Removal of lexical environment (from `default` clause)
+info: |
+    1. Let exprRef be the result of evaluating Expression.
+    2. Let switchValue be ? GetValue(exprRef).
+    3. Let oldEnv be the running execution context's LexicalEnvironment.
+    4. Let blockEnv be NewDeclarativeEnvironment(oldEnv).
+    5. Perform BlockDeclarationInstantiation(CaseBlock, blockEnv).
+    6. Set the running execution context's LexicalEnvironment to blockEnv.
+    7. Let R be the result of performing CaseBlockEvaluation of CaseBlock with
+      argument switchValue.
+    [...]
+features: [let]
+---*/
+
+let x = 'outside';
+var probeDefault, probeDefaultBeforeCase, probeCase;
+
+switch (null) {
+  default:
+    let x = 'inside';
+    probeDefault = function() { return x; };
+}
+
+assert.sameValue(probeDefault(), 'inside', 'from lone `default` clause`');
+assert.sameValue(x, 'outside');
+
+switch (null) {
+  default:
+    let x = 'inside';
+    probeDefaultBeforeCase = function() { return x; };
+  case 0:
+    probeCase = function() { return x; };
+}
+
+assert.sameValue(
+  probeDefaultBeforeCase(),
+  'inside',
+  'from `default` clause preceding `case` clause'
+);
+assert.sameValue(
+  probeCase(), 'inside', 'from `case` clause following `default` clause'
+);
+
+reportCompare(0, 0);