#9118: Can't eta-reduce representational coercions -------------------------------------+------------------------------------ Reporter: goldfire | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: #9117 -------------------------------------+------------------------------------ Comment (by rwbarton): nomeata: A type variable can't be instantiated at a(n unsaturated) type family (application), right? So `Coercion F1 F2` isn't a legal type-level expression at all. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9118#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler