#16305: When should -Wmissed-specializations fire? -------------------------------------+------------------------------------- Reporter: crockeea | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by crockeea): Looks like your assessment is accurate, Simon. Perhaps the only problem here is a documentation issue, because I don't think the docs for `-Wmissed-specs` make it clear when a warning is issued. I'm also interested in understanding the warning from my example. The function names appear to be core, and it's not clear to me that `Data.Map.Internal.$fShowMap_$cshowsPrec` even corresponds to a function in source code. If that's the case, then the warning isn't very useful, either. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16305#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler