diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/for-of/syntax-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/for-of/syntax-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+// We correctly reject bogus for-of loop syntax.
+
+load(libdir + "asserts.js");
+
+function assertSyntaxError(code) {
+    assertThrowsInstanceOf(function () { Function(code); }, SyntaxError, "Function:" + code);
+    assertThrowsInstanceOf(function () { eval(code); }, SyntaxError, "eval:" + code);
+    var ieval = eval;
+    assertThrowsInstanceOf(function () { ieval(code); }, SyntaxError, "indirect eval:" + code);
+}
+
+function test(badForHead) {
+    assertSyntaxError(badForHead + " {}");  // apply directly to forHead
+    assertSyntaxError("[0 " + badForHead + "];");
+}
+
+var a, b, c;
+test("for (a in b of c)");
+test("for each (a of b)");
+test("for (a of b of c)");
+test("for (let (a = 1) a of b)");
+test("for (let {a: 1} of b)");