diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/splice-huge-array-finishes.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/splice-huge-array-finishes.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+// Making the array huge and sparse shouldn't leave us iterating through the entire array.
+// But it does, sadly. Disable, because it takes too long.
+if (0) {
+    var arr = [1, 2, 3, 4, 5, 6, 7, 8];
+    arr.length = Math.pow(2, 32) - 2;
+    arr.splice(5); // also test overflow
+
+    assertEq(arr.length, 5);
+    assertEq(arr[0], 1);
+    assertEq(arr[1], 2);
+    assertEq(arr[2], 3);
+    assertEq(arr[3], 4);
+    assertEq(arr[4], 5);
+    assertEq(arr[5], undefined);
+}