#13936: initTc: unsolved constraints --------------------------------------+--------------------------------- Reporter: junkbondtrader | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.2 Keywords: | Operating System: Windows Architecture: x86_64 (amd64) | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: --------------------------------------+--------------------------------- {{{ Prelude> lucky (7.0 :: Num) ghc.exe: panic! (the 'impossible' happened) (GHC version 8.0.2 for x86_64-unknown-mingw32): initTc: unsolved constraints WC {wc_insol = [W] lucky_afgR :: t_afgQ[tau:1] (CHoleCan: lucky) [W] lucky_afhl :: t_afhk[tau:1] (CHoleCan: lucky)} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} {{{#!hs lucky :: Num -> String lucky 7 = "LUCKY NUMBER SEVEN!" lucky x = "Sorry, you're out of luck, pal!" }}} I believe that above function declaration doesn't actually make sense, but it caused a panic that asked for a bug report so I'm doing it. Apologies for my newness :) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13936 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler