ghc panics
{-# LANGUAGE DataKinds, StandaloneDeriving, TypeOperators, GADTs, FlexibleInstances #-}
data A a where
A :: A (a:as) -> a -> A as
deriving instance Show a => Show (A a)
gives
% ghci -ignore-dot-ghci Panic.hs
GHCi, version 8.1.20160117: http://www.haskell.org/ghc/ :? for help
[1 of 1] Compiling Main ( Panic.hs, interpreted )
ghc: panic! (the 'impossible' happened)
(GHC version 8.1.20160117 for x86_64-unknown-linux):
fvProv falls into a hole {a1aV}
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
>
Trac metadata
Trac field | Value |
---|---|
Version | 8.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |