#13566: Bigger core size in ghc8 compared to ghc7 -------------------------------------+------------------------------------- Reporter: pacak | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Compiler | Version: 8.2.1-rc2 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 pacak):
I'm a bit lost here. Am I to understand from comment:7 that this was an issue in GHC 8.0 that is fixed in 8.2.1-rc1?
It can probably be closed for now. The problem is this sample is very fragile - for example if I remove AdditiveGroup instance which is not used at all or even specialization pragma - it suddenly works as expected in ghc 8.0. There are more code using generics in our project. If I find a way to reproduce it for ghc 8.2 - I can reopen it again with new data. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13566#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler