#13117: Derived functor instance for void types handles errors badly -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: feature request | Status: new Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #7401 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * related: => #7401 Comment: The discussion is at #7401, which proposed an overhaul of the way derived instances for void types work. Ultimately, a consensus was never reached as to how derived `Eq` instances should work. See https://ghc.haskell.org/trac/ghc/ticket/7401#comment:46. If someone would be willing revive that discussion and advocate for a position, I'd be very appreciative, as I'm hesitant to poke that sleeping dragon again :) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13117#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler