#11066: Inacessible branch should be warning - otherwise breaks type soundness? -------------------------------------+------------------------------------- Reporter: rrnewton | Owner: (none) Type: bug | Status: new Priority: high | Milestone: 8.6.1 Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: #8128, #8740 | Differential Rev(s): Phab:D1454 Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Hmm. I don't think I agree, Adam. GHC currently simply doesn't use insoluble inert constraints, so it won't make use of `Int ~ Bool`. Would you like to offer an example where we don't produce correct Core under inaccessible branches? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11066#comment:42 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler