From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 js/src/jit-test/tests/basic/letTDZEffectful.js | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 js/src/jit-test/tests/basic/letTDZEffectful.js

(limited to 'js/src/jit-test/tests/basic/letTDZEffectful.js')

diff --git a/js/src/jit-test/tests/basic/letTDZEffectful.js b/js/src/jit-test/tests/basic/letTDZEffectful.js
new file mode 100644
index 000000000..62245d8c1
--- /dev/null
+++ b/js/src/jit-test/tests/basic/letTDZEffectful.js
@@ -0,0 +1,13 @@
+function assertThrowsReferenceError(f) {
+  var e = null;
+  try {
+    f();
+  } catch (ex) {
+    e = ex;
+  }
+  assertEq(e instanceof ReferenceError, true);
+}
+
+// TDZ is effectful, don't optimize out x.
+assertThrowsReferenceError(function () { x; let x; });
+assertThrowsReferenceError(function () { x; const x = undefined; });
-- 
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