will such usage be banned n 7.8.4? No. But that's still a bug and you shouldn't construct your code around
#9898: Wanted: higher-order type-level programming -------------------------------------+------------------------------------- Reporter: erisco | Owner: Type: feature | Status: new request | Milestone: Priority: normal | Version: 7.8.3 Component: Compiler | Keywords: (Type checker) | Architecture: x86_64 (amd64) Resolution: | Difficulty: Unknown Operating System: Windows | Blocked By: Type of failure: GHC | Related Tickets: rejects valid program | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by rwbarton): Replying to [comment:5 jstolarek]: this. Really? #9433 is marked as merged as 7.8.4, or am I misunderstanding something here? Or is there a distinction between the "applied to zero arguments" case and the "applied to at least one, but fewer than its arity" case? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9898#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler