#16310: Program fails with "Impossible case alternative" when optimized -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime crash | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * Attachment "ghc-8.2.2.dump-core-lint" added. Result of running `/opt/ghc/8.2.2/bin/ghc -O Bug.hs -fforce-recomp -dcore- lint` -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16310 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler