#10403: GHC crashes on a partial type signature -------------------------------------+------------------------------------- Reporter: Artyom.Kazak | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Resolution: | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Compile-time | (amd64) crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by Artyom.Kazak): Error message (in GHCi 7.10.1): {{{#!hs $ ghci GHCi, version 7.10.1: http://www.haskell.org/ghc/ :? for help Prelude Control.Applicative Control.Monad Data.Ratio> :l Bug.hs [1 of 1] Compiling Main ( Bug.hs, interpreted ) Bug.hs:18:10: Couldn't match type `b' with `H I' `b' is untouchable inside the constraints () bound by the type signature for app :: H (B t) at Bug.hs:17:8-14ghc: panic! (the 'impossible' happened) (GHC version 7.10.1 for x86_64-unknown-linux): No skolem info: b_aFd[sk] Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10403#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler