failing test in Chrome 35

[Yaffle]

expect(Number.isNaN(Math.clz32(undefined))).to.be.ok;

[ljharb]

Passes for me in Chrome 35.0.1916.153 - which version are you using exactly?

[Yaffle]

35.0.1916.153 m, with enabled "javascript exp. features" to enable native Math.clz32
Actually, it seems, this is a wrong test:
Math.clz32(undefined) should be 32, not NaN, according to spec.
Sorry, i will not give you a link to the spec.

[ljharb]

https://people.mozilla.org/~jorendorff/es6-draft.html#sec-math.clz32 says if n is 0, p will be 32, and previously, Let n be ToUint32(x), and the ToUint32 algorithm specifies If number is NaN, +0, −0, +∞, or −∞, return +0.

So, you're correct - thanks for filing and clarifying. Will fix.