#13300: panic! isInjectiveTyCon sees a TcTyCon W -------------------------------------+------------------------------------- Reporter: siddhanathan | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rwbarton): For those like me who failed to spot the error immediately, the correct error message is (from 7.10) {{{ W.hs:4:3: Data constructor ‘WI’ returns type ‘Int’ instead of an instance of its parent type ‘W’ In the definition of data constructor ‘WI’ In the data declaration for ‘W’ }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13300#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler