#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: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by andreas.abel): What should the implementation of `fmap` be here? {{{#!hs fmap _ x = x `seq` error "Void fmap" }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13117#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler