Austin Seipp
The catch with such a change is that there is no macro to determine whether we're using 7.8.3 or 7.8.4, so it's harder for users to figure things out (they have to use `MIN_VERSION_base` from Cabal). But maybe that doesn'tm atter too much. So, yes, I think it's doable, but that's a sticky bit.
Also, I should mention that as written the patch changes no exported interfaces. Instead of changing `registerFd` it adds an additional variant `registerFd'` which allows the user to specify a lifetime. That being said, I'm personally not terribly fond of adding these sorts of backwards compatibility variants unless really necessary. Given that this is such a low-visibility interface we may want to consider just modifying `registerFd` and avoid further polluting the namespace (this would be the third exported variant of `registerFd`). Thoughts? - Ben