#11432: Cannot export operator newtype -------------------------------------+------------------------------------- Reporter: phadej | Owner: skvadrik Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 8.0.1-rc1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1888 Wiki Page: | -------------------------------------+------------------------------------- Comment (by skvadrik): I agree that basing compilation decisions on subtle syntax changes is bad, but error message {{{ error: Not in scope: ‘%%’ }}} which appears suddenly after GHC upgrade is obscure. I think it should at least suggest the cause of error and the way to fix it. Perhaps something like this (don't hesitate to suggest a better wording): {{{ error: Not in scope: ‘%%’ Note: if '%%' is a type constructor, add 'type' keyword: 'type (%%)' (requires extension TypeOperators) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11432#comment:26 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler