#8827: Inferring Safe mode with GeneralizedNewtypeDeriving is wrong -------------------------------------+------------------------------------ Reporter: goldfire | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.8.1-rc2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: 8226, 8745 -------------------------------------+------------------------------------ Comment (by simonpj): I don't have a strong opinion; (C) is fine with me if library authors are happy. Maybe they will be; after all, they didn't have lifted coercions before, and (by default) they still won't. Note that (C) is not related to the visiblity or otherwise of a recursive set of data constructors; it's simply a question of what the default roles for an un-annotated data type are. Does anyone else care? It's a tremendous pity that all this is happening just as 7.8 is on the verge of release (indeed, I thought it had already happened). I am reluctant to delay it while we debate this issue further. (I am not optimistic about a rapid consensus.) Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8827#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler