#11444: 8.0 rc1 panics in applyTypeToArgs -------------------------------------+------------------------------------- Reporter: osa1 | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.0.1-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #13027 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
In particular, we probably never want a pointer equality test to float out of a case on one of `reallyUnsafePtrEq`'s arguments.
OK. Fix that in `primops.txt.pp` by giving `reallyUnsafePtrEq` a `can_fail` attribute. That sounds a bit odd, but read `Note [dataToTag#]` in `primops.txt.pp`, and `Note [PrimOp can_fail and has_side_effects]` in `PrimOp.h`, and expecially `Note [Transformations affected by can_fail and has_side_effects]` in `PrimOp.hs`. Would you like to do that? Add a Note obviously with your example above. Maybe make a new ticket. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11444#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler