Hello Bryan, On 2015-01-20 at 23:17:01 +0100, Bryan O'Sullivan wrote: [...]
For the record, it took me almost an hour to update attoparsec to fix all the various regressions, or to put it more charitably changes, introduced in GHC 7.10. I have twenty-something other packages to go through. I don't keep track of the time sunk from release to release, but this feels somewhat worse than average.
I'm a bit confused, several past attoparsec versions seem to build just fine with GHC 7.10: https://ghc.haskell.org/~hvr/buildreports/attoparsec.html were there hidden breakages not resulting in compile errors? Or are the fixes you mention about restoring -Wall hygiene?
Basically, the more careful you are in writing a package, the more each update of GHC and base costs in nickel-and-dime tweaks to keep a build clean. It's not a very happy-making feedback loop. "Be a good citizen, and your reward is to spend *even more* time cleaning up!"
Cheers, hvr