#15862: Typeable panic with promoted rank-2 kind (initDs) -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.1 Resolution: | Keywords: Typeable Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Replying to [comment:1 goldfire]:
I would fix the missing impredicativity check before worrying about `initDs`.
In case you didn't notice this, I deliberately enabled `ImpredicativeTypes` in this program :) I, too, am surprised that this panics, though. Especially since `typeIsTypeable` appears to [http://git.haskell.org/ghc.git/blob/1a3b9bd0b674ad16a41b942c738b8f34564bcd8d... already answer "no"] when a type contains a nested `forall` like this: {{{#!hs typeIsTypeable (ForAllTy{}) = False }}} It's possible that something else is going wrong, though. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15862#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler