kriskowal/es5-shim — comment on commit 21c880db543b5d15fe01443a0d4bf1ec4dcf75dc
File:  line 0
By michaelficarra:

@paulmillr: I don't know of an interpreter that *disallows* writing to `Infinity` outside strict mode. They all implement ES3 15.1.1.2.

> The initial value of `Infinity` is `+∞` (section 8.5). This property has the attributes { `DontEnum`, `DontDelete` }.