/js/src/jit-test/tests/basic/testBug582766.js

 1expected = 4;
 2
 3var fourth = { nextSibling: null };
 4var third  = { nextSibling: fourth };
 5var second = { nextSibling: third };
 6var first  = { nextSibling: second };
 7
 8function f() {
 9  let loopcount = 0;
10  for (let node = first; node; node = node.nextSibling) {
11    loopcount++;
12  }
13  return loopcount;
14}
15
16actual = f();
17
18assertEq(actual, expected);