[GHC] #7900: The impossible happend
#7900: The impossible happend -----------------------------+---------------------------------------------- Reporter: dhjdhj | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.4.2 | Keywords: Os: Unknown/Multiple | Architecture: Unknown/Multiple Failure: None/Unknown | Blockedby: Blocking: | Related: -----------------------------+---------------------------------------------- ghc: panic! (the 'impossible' happened) (GHC version 7.4.2 for x86_64-apple-darwin): compiler/rename/RnSource.lhs:430:14-81: Irrefutable pattern failed for pattern Data.Maybe.Just (inst_tyvars, _, SrcLoc.L _ cls, _) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7900 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#7900: The impossible happend ---------------------------------+------------------------------------------ Reporter: dhjdhj | Owner: Type: bug | Status: closed Priority: normal | Component: Compiler Version: 7.4.2 | Resolution: duplicate Keywords: | Os: Unknown/Multiple Architecture: Unknown/Multiple | Failure: None/Unknown Blockedby: | Blocking: Related: | ---------------------------------+------------------------------------------ Changes (by monoidal): * status: new => closed * resolution: => duplicate Comment: Almost certainly this is a duplicate of #5951 - you have a malformed class declaration (for example, you wrote `instance A => B => C` or `instance A -> B`). If this is not a case, please reopen pasting the source code causing the error. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7900#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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