TypeInType Compile-time Panic
I've been playing around with GHC 8.0.1-rc4 release and got a panic from the following (stripped down) code:
{-# LANGUAGE TypeInType #-}
data Nat = Z | S Nat
class C (n :: Nat) where
type T n :: Nat
f :: (a :: T n)
ghc: panic! (the 'impossible' happened)
(GHC version 8.0.0.20160421 for x86_64-apple-darwin):
isInjectiveTyCon sees a TcTyCon T
Trac metadata
Trac field | Value |
---|---|
Version | 8.0.1-rc4 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |