#8566: Given kind equalities are discarded -------------------------------------+------------------------------------ Reporter: dreixel | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: polykinds/T8566 | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by simonpj): Maybe we could reject any data constructor whose type risks an existential kind equality (eg including the type-function thing you mention). That would be conservative but safe. Maybe with a flag to say "ok, drop the check and I'll deal with any bad error messages I get". Would you like to try that? Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8566#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler