#12234: 'deriving Eq' on recursive datatype makes ghc eat a lot of CPU and RAM -------------------------------------+------------------------------------- Reporter: slyfox | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | 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: | -------------------------------------+------------------------------------- Comment (by vladki): Just in case, removing one of the parameters in the `ExprF` constructor makes the problem go away: {{{ data ExprF rT = ExprF rT deriving Eq }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12234#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler