#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 JulianLeviston): I can't seem to successfully build my ghc any more... {{{ GHC error in desugarer lookup in GHC.Real: Can't find interface-file declaration for type constructor or class mkRational Probable cause: bug in .hi-boot file, or inconsistent .hi file Use -ddump-if-trace to get an idea of which file caused the error ghc-stage1: panic! (the 'impossible' happened) (GHC version 8.7.20181012 for x86_64-apple-darwin): initDs }}} after I attempted to do the profiler build... that's from attempting a `BuildFlavour = devel2` build without `stage=2` specified. I might follow the build instructions from the ground up again without my code in place then put it back and see if that works. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15646#comment:55 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler