diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-569464.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-569464.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,36 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor: Dave Herman
+ */
+
+function earlyError(src) {
+    var threw;
+    try {
+        eval(src);
+        threw = false;
+    } catch (expected) {
+        threw = true;
+    }
+    assertEq(threw, true);
+}
+
+earlyError("'use strict'; let (x) 42;");
+earlyError("function f() { 'use strict'; let (x) 42;");
+earlyError("'use strict'; function id(x) { return x } let (a=1) a ? f : x++(42);");
+earlyError("function id(x) { return x } function f() { 'use strict'; let (a=1) a ? f : x++(42); }");
+earlyError("'use strict'; let (x=2, y=3) x=3, y=13");
+earlyError("function f() { 'use strict'; let (x=2, y=3) x=3, y=13 }");
+
+x = "global";
+(let (x=2, y=3) x=3, y=13);
+assertEq(x, "global");
+assertEq(y, 13);
+
+// https://bugzilla.mozilla.org/show_bug.cgi?id=569464#c12
+g = (let (x=7) x*x for each (x in [1,2,3]));
+for (let y in g) {
+    assertEq(y, 49);
+}
+
+reportCompare(0, 0, "In strict mode, let expression statements are disallowed.");