#15696: Derived Ord instance for enumerations with more than 8 elements seems to be incorrect -------------------------------------+------------------------------------- Reporter: mrkkrp | Owner: (none) Type: bug | Status: patch Priority: highest | Milestone: 8.6.2 Component: Compiler | Version: 8.6.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D5196 Wiki Page: | -------------------------------------+------------------------------------- Changes (by osa1): * status: new => patch * differential: => Phab:D5196 Comment: Simon, please review. There are a few ways to fix this and I probably did the most conservative thing by always introducing a case around `dataToTag#`. Perhaps we want to change how we record evaluated-ness of CAFs in their Ids instead. We may also want to pay more attention to #14677 if we rely on strictness annotations of data constructor fields to decide on evaluatedness of values elsewhere. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15696#comment:21 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler