diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parser/bug-889628.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parser/bug-889628.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+// Destructuring assignment to eval or arguments in destructuring is a SyntaxError
+
+load(libdir + "asserts.js");
+
+var patterns = [
+    "[_]",
+    "[a, b, _]",
+    "[[_]]",
+    "[[], [{}, [_]]]",
+    "{x:_}",
+    "{x:y, z:_}",
+    "{0:_}",
+    "{_}",
+    //"[..._]"
+];
+
+// If the assertion below fails, congratulations! It means you have added
+// spread operator support to destructuring assignment. Simply uncomment the
+// "[..._]" case above. Then delete this comment and assertion.
+assertThrowsInstanceOf(() => Function("[...x] = [1]"), ReferenceError);
+
+for (var pattern of patterns) {
+    var stmt = pattern + " = obj";
+    if (stmt[0] == "{")
+        stmt = "(" + stmt + ")";
+    stmt += ";"
+
+    // stmt is a legal statement...
+    Function(stmt);
+
+    // ...but not if you replace _ with one of these two names.
+    for (var name of ["eval", "arguments"]) {
+        var s = stmt.replace("_", name);
+        assertThrowsInstanceOf(() => Function(s), SyntaxError);
+        assertThrowsInstanceOf(() => eval(s), SyntaxError);
+        assertThrowsInstanceOf(() => eval("'use strict'; " + s), SyntaxError);
+    }
+}