#13333: Typeable regression in GHC HEAD -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: goldfire Type: bug | Status: patch Priority: highest | Milestone: 8.2.1 Component: Compiler (Type | Version: 8.1 checker) | Keywords: typeable, Resolution: | TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D3424 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"09bf135ace55ce2572bf4168124d631e386c64bb/ghc" 09bf135a/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="09bf135ace55ce2572bf4168124d631e386c64bb" Fix #13333 by fixing the covar's type in ctEvCoercion The change is noted in Note [Given in ctEvCoercion]. This patch also adds a bit more commentary to TcFlatten, documenting some key invariants of the flattening algorithm. While in the area, I also removed some stale commentary from TcCanonical. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13333#comment:16> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler