#15646: ghci takes super long time to find the type of large fractional number -------------------------------------+------------------------------------- Reporter: Johannkokos | Owner: | JulianLeviston Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: GHCi | Version: 8.4.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #5692 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): Julian, can you please paste the exact error you are experiencing as I don't see how `Problem 1` can arise. When we bootstrap GHC, we first compile stage1 with stage0. So no problems here as the call to lookup `mkRational` is made when stage1 is run. When we build stage2, we first build prelude with stage1, including `GHC.Real` so there might be some problems here if a module needs to call `mkRational` before `GHC.Real` is compiled but this is hard to debug without any error messages or other information to be going from! I think at this point it would be very useful if you put your code up as a MR so that people can comment directly about what needs doing. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15646#comment:70 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler