#14880: GHC panic: updateRole -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.2.2 checker) | Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Replying to [comment:6 goldfire]:
With the `Foo` in comment:3, this also panics:
It does? I must be doing something wrong, since this appears to compile for me: {{{#!hs {-# LANGUAGE GADTs #-} {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE TypeInType #-} module Bug where import Data.Kind import Data.Proxy data Foo (x :: Type) :: forall (a :: x). Proxy a -> Type quux :: forall x arg. Proxy (Foo arg) -> Maybe x quux = undefined }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14880#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler