#10833: Use injective type families when dealing with givens -------------------------------------+------------------------------------- Reporter: jstolarek | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 7.10.2 checker) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #6018 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): I don't think this relates to [[http://www.win.tue.nl/rtaloop/problems/79.html|RTA #79]]. (The soundness of type families + `UndecidableInstances` + non-linear patterns does.) Perhaps more sweat on the proof would yield fruit. But somehow it failed to succumb, and so I'm wary of putting it in Core. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10833#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler