diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/parser/bug-888002-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/parser/bug-888002-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,12 @@
+// Constant folding doesn't affect non-strict delete.
+
+(function (x) {
+    // These senseless delete-expressions are legal. Per ES5.1 11.4.1 step 2,
+    // each one does nothing and returns true.
+    assertEq(delete (1 ? x : x), true);
+    assertEq(delete (0 || x), true);
+    assertEq(delete (1 && x), true);
+
+    // This one is legal too, but returns false.
+    assertEq(delete x, false);
+}());