Michael Snoyman
Hi Simon,
We had a small pow-wow over here. We're already providing relevant customers with a custom-built GHC, and only using this feature internally to their codebases, so it's not a necessity to get this into upstream GHC 7.10. It would be nice if the library ecosystem could start to add in support for this feature, but on the other hand having it out in the wild ties everyone's hands with improving the feature before the 7.12 release.
So put FP Complete down as somewhat ambivalent on whether it should go out.
Hi Michael, We also had a pow-wow yesterday and decided that it would be fairly harmless to merge the change for 7.10.2 (but reserve the right to vehemently enforce the usual no-new-features-or-interfaces-in-minor-releases policy in the future). However, do you suppose it would be possible to run one more Stackage build just to ensure that this (and a couple of other straggling patches that were recently merged) doesn't break anything? Cheers, - Ben