Panic, "falls into a hole"
{-# language PolyKinds #-}
{-# language FlexibleContexts #-}
{-# language ConstraintKinds #-}
{-# language FlexibleInstances #-}
{-# language FunctionalDependencies #-}
import GHC.Types (Constraint)
class Ríki (p :: i -> i -> *)
class (Ríki p) => Varpi p q f | f -> p q
instance Varpi () () f => Varpi (->) (->) (Either f) wherecauses
% ghci -ignore-dot-ghci /tmp/testing.hs
GHCi, version 8.1.20160117: http://www.haskell.org/ghc/ :? for help
[1 of 1] Compiling Main ( /tmp/testing.hs, interpreted )
/tmp/testing.hs:11:10: error:ghc: panic! (the 'impossible' happened)
(GHC version 8.1.20160117 for x86_64-unknown-linux):
fvProv falls into a hole {a13R}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
>
Leaving GHCi.Trac metadata
| Trac field | Value |
|---|---|
| Version | 7.10.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |