#15226: GHC doesn't know that seq# produces something in WHNF -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4789 Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): I think the right way for now is probably to stick this in `simplAlt`. When the scrutinee is `seq# x s`, we want to behave the way we would for a strict datacon field. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15226#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler