#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 adamgundry): @tdammers I don't think this is as straightforward as simply switching the error into a warning. Have you looked at Phab:D1454 and the associated discussion? Indeed GHC doesn't currently produce correct Core under inaccessible branches, and doing so would probably require extending Core. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11066#comment:41 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler