#13804: MonoLocalBinds/RankNTypes type inference regression in GHC 8.2 -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: Component: Compiler (Type | Version: 8.2.1-rc2 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: #11698 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by facundo.dominguez): Something odd is going on. Adding the type signature {{{sendresult :: Ivory eff ()}}} also makes the program compile. {{{tct_closed}}} is affected by the use of {{{periph}}} in {{{sendresult'}}}. This makes {{{sendresult}}} not closed. But I do not understand how this relates to the error message that GHC produces. It might be that some use of {{{tct_closed}}} in the type-checker is assuming its old meaning. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13804#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler