30 May
2018
30 May
'18
11:45 a.m.
Patrick Dougherty
Huh,
So this is a bug I thought I dealt with :/ In the short term, I've found that often simply trying the build again can fix it. This is a dependency issue that I don't 100% understand.
I also encountered this (although it's rather unlikely to occur with high build parallelism, which is how it snuck through validation). Anyways, I filed #15197 and pushed D4753 as a possible workaround. I believe the root cause is a bug in `ghc -M`'s treatment of ways. Cheers, - Ben [1] https://phabricator.haskell.org/D4753