#15927: Weird interaction between fundeps and overlappable instances -------------------------------------+------------------------------------- Reporter: Darwin226 | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.3 Component: Compiler | Version: 8.6.2 Resolution: | Keywords: | FunctionalDependencies Operating System: Unknown/Multiple | Architecture: Type of failure: GHC accepts | Unknown/Multiple invalid program | Test Case: Blocked By: | Blocking: Related Tickets: 10675, 15632 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by AntC): * keywords: => FunctionalDependencies * related: => 10675, 15632 Comment: Yes you could always evade FunDep consistency like that -- see #10675 at "bogus"; or #15632 for a cut-down example. Well done for getting that inconsistency into the same constraint! There's nothing stopping you putting a bunch of constraints that are together unsatisfiable. That would usually mean you couldn't use `f`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15927#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler