8 Oct
2016
8 Oct
'16
3:38 p.m.
Simon Peyton Jones via ghc-devs
For HEAD I get.
$ ghc -c Foo.hs
Foo.hs:5:8: warning: [-Wpartial-type-signatures] * Found type wildcard `_' standing for `Bool' * In the type signature: foo :: _
Not sure about the 8.0 branch. There may well be ticket(s) about this; worth a hunt, because it looks as if it's already fixed.
Sadly it looks like this issue is still present on ghc-8.0. A quick search through Trac didn't turn up any compelling candidate fixes, however. It looks like identifying the missing patch may require more work. Cheers, - Ben