#12144: GHC panic when using DeriveAnyClass with functor-like class and datatype with a type variable in a contravariant position -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.0.1 Resolution: fixed | Keywords: Generics Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Compile-time | Test Case: crash | tests/deriving/should_compile/T12144_1, | tests/deriving/should_compile/T12144_2 Blocked By: | Blocking: Related Tickets: #5462, #7346, | Differential Rev(s): Phab:D2961 #12423 | Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: patch => closed * testcase: => tests/deriving/should_compile/T12144_1, tests/deriving/should_compile/T12144_2 * resolution: => fixed -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12144#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler