#11666: Severe performance degradation in GHC 8.0.1 compared to GHC 7.10.x -------------------------------------+------------------------------------- Reporter: mrkkrp | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.0.1-rc2 Resolution: invalid | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by rwbarton): * status: new => closed * resolution: => invalid Comment: This is due to https://github.com/haskell/filepath/commit/dd13bb32b7b563248fa2bfa232891e057... and the generate-and-check strategy used in the `Arbitrary EntrySelector` instance (and maybe others). That will almost never work now for long paths that `Windows.isValid` recognizes more characters as invalid. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11666#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler