#11117: mdo blocks in error messages are shown modified -------------------------------------+------------------------------------- Reporter: nomeata | Owner: Type: bug | Status: new Priority: low | Milestone: Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): You are dead right ... this is not what GHC usually does. But it's harder here. The renamer re-organises an `mdo` into strongly- connected components, and therefore adds `rec` statements. This message comes from the type checker, which now doesn't know the original program. Not great. I'm not sure the best way to fix. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11117#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler