#9291: Don't reconstruct sum types if the type subtly changes -------------------------------------+------------------------------------- Reporter: schyler | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 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): Wiki Page: | -------------------------------------+------------------------------------- Comment (by rwbarton): Right, so it's not a very good example. But I think correctness of IO mostly relies on the state threading discipline (which doesn't need types), combined I guess with the need to preserve the semantics of possibly-diverging-but-otherwise-pure programs. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9291#comment:39 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler