#14321: -fsolve-constant-dicts is not very robust when dealing with GADTs -------------------------------------+------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #9701 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): I'm not sure what you are expecting here. `isItSilly` tyepchecks and elaborates thus: {{{ isItSilly (v::a) (Silly (d:: Ord a) (x::a)) = (<) d v x }}} It can't do anyting else. `isItSillyIntTA` is simply a call to `isItSilly`. No dictionaries at all; solving constant dictionries doesn't arise. Ditto `isItSillyInt`. Look as if it's all behaving precisely as advertised. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14321#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler