#11008: Difficulties around inferring exotic contexts -------------------------------------+------------------------------------- Reporter: crockeea | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): I'm sorry -- I'm afraid I don't understand your last comment. Or, rather, my understanding leads me directly to the behavior we currently have: check derived instances for exotic contexts and reject if exotic, but skip the exotic-check for hand-written instances (including standalone- deriving). (Note that there is no GND in sight here -- just normal `deriving`.) Perhaps illustrate your idea with a few examples? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11008#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler