#8745: GeneralizedNewtypeDeriving is still not Safe -------------------------------------+------------------------------------ Reporter: goldfire | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.1-rc1 Resolution: | Keywords: Safe Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by goldfire): I had forgotten about this detail. With this in place (is it tested by anything in the testsuite?), I'm much more in favor of labeling GND and `coerce` as Safe. It's possible that the (rather draconian, admittedly) check that Joachim (nomeata) describes could be relaxed in the future once library authors are more familiar with role annotations. I no longer see a downside to making GND and `coerce` Safe. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8745#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler