#7894: Crash on :i M.-> ---------------------------------+------------------------------------------ Reporter: monoidal | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler (Parser) | Version: 7.6.3 Resolution: fixed | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: GHCi crash | Difficulty: Unknown Testcase: ghci/scripts/T7894 | Blockedby: Blocking: | Related: ---------------------------------+------------------------------------------ Changes (by simonpj): * status: new => closed * difficulty: => Unknown * resolution: => fixed * testcase: => ghci/scripts/T7894 Comment: The panic in `OccName.isDataOcc` looked like this: {{{ isDataOcc (OccName DataName _) = True isDataOcc (OccName VarName s) | isLexCon s = pprPanic "isDataOcc: check me" (ppr s) -- Jan06: I don't think this should happen isDataOcc _ = False }}} I see no good reason why `isDataOcc` should be sure that `isLexCon` would definitely be false (and it's true in this case). So I've just removed the bogus looking test. Simon -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7894#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler