#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: | -------------------------------------+------------------------------------- Changes (by jstolarek): * owner: jstolarek => Comment: In the "Injective Type Families for Haskell" we did not present a full proof of soundness of injective type families. It might be the case that the proof requires solving [[http://www.win.tue.nl/rtaloop/problems/79.html|RTA #79]]. But we don't know for sure. Richard argues that for this reason we should not make these changes to Core - if our conjecture that our proof holds turns out to be incorrect Core will become inconsistent. So for the time being I am abandoning further work on this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10833#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler