#11715: Constraint vs * -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: Compiler (Type | Version: 8.0.1-rc1 checker) | Resolution: | Keywords: Typeable 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 int-index): Replying to [comment:32 simonpj]: This should work, although I would prefer to have `incoherentWith` at my disposal as well, for cases when I'm willing to manually ensure that in any local scope only one value is available. Consider this case: {{{ module M (f) where f :: Int -> ... helper1 :: Int => ... helper2 :: Int => ... }}} Here I'd like to pass `Int` to the helpers using `incoherentWith`, but since only `f` is exported, the unsafety is contained within the module boundaries. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11715#comment:33 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler