#15286: "Can't use Natural in base" when compiling GHC.Natural with -O0 -------------------------------------+------------------------------------- Reporter: alpmestan | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 8.5 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Building GHC | Unknown/Multiple failed | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by sighingnow): With `-O0`, if we remove the methods `+` and `-` from the `instance Num Natural` then everything works well. Link: https://git.haskell.org/ghc.git/blob/fe770c211631e7b4c9b0b1e88ef9b6046c6585e... -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15286#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler