#12083: ghc-8.0.1-rc4: tyConRoles sees a TcTyCon -------------------------------------+------------------------------------- Reporter: _deepfire | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.0.1-rc4 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash | Test Case: Yes. Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mniip): I just hit what I think is an instance of this bug, but in a completely different setup. So here's another testcase I guess: {{{ {-# LANGUAGE GADTs #-} module Bug where class Class a where test :: a -> (Eq a => r) -> r data P a b where Con :: (Class a, a ~ b) => P a b }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12083#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler