#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 tdammers): It turns out that `T3651` doesn't fail the right way if we turn this error into a warning and then compile with `-Werror`, because the core linter errors out first, so instead of the errorized warning, we see the core linter failure. Manually compiling with just `-Werror` (but not `-dcore- lint`) does produce the desired behavior. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11066#comment:38 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler