#13333: Typeable regression in GHC HEAD -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: bgamari Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: Compiler (Type | Version: 8.1 checker) | Resolution: | Keywords: typeable Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Looking at `-ddump-tc-trace` from the program in the ticket description, it seems that we are failing to solve for this, {{{ WC {wc_simple = [WD] $dTypeable_a29a {0}:: Typeable (T |> Trans (Sym cobox ->_N <*>_N) (cobox ->_N <*>_N)) (CDictCan)} }}} I believe the reason for this is that we don't handle casts in the `Typeable` solver. I'll need to think about this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13333#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler