#5412: dataTypeConstrs gives unhelpful error message -------------------------------------+------------------------------------ Reporter: NeilMitchell | Owner: klangner Type: bug | Status: patch Priority: normal | Milestone: 7.6.2 Component: libraries/base | Version: 7.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by nomeata): Case 1. A better error message here would be `"Data.Data.gunfold: Constructor " ++ show c ++ " is not of type Char"`. But if you don’t feel like working on that class of error message right now you can concentrate on the others and skip these for now. Case 2. Sounds good. Or maybe `"Data.Data.repConstr: The given ConstrRep does not fit to the given DataType"`, possibly extended with actually showing both parameters, or using `dataTypeName`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/5412#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler