#13450: Better parse error for empy character literal -------------------------------------+------------------------------------- Reporter: parsonsmatt | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones <simonpj@…>): In [changeset:"74cd1be0b2778ad99566cde085328bde2090294a/ghc" 74cd1be0/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="74cd1be0b2778ad99566cde085328bde2090294a" Don't deeply expand insolubles Trac #13450 went bananas if we expand insoluble constraints. Better just to leave them un-expanded. I'm not sure in detail about why it goes so badly wrong; but regardless, the less we mess around with insoluble contraints the better the error messages will be. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13450#comment:1> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler