#14645: Allow type family in data family return kind -------------------------------------+------------------------------------- Reporter: goldfire | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.4.1-alpha1 Resolution: | Keywords: TypeInType, | TypeFamilies Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Replying to [comment:9 goldfire]:
Why do you think you need step 2? I think the existing code in `kcDataDefn` will do the right thing here.
I'm not sure that I understand this comment. You're suggesting that GHC will do all of the steps outlined in comment:3 with only step 1? Experimental evidence suggests that this is not true, as trying an implementation with only step 1 panics when given the program in comment:3. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14645#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler