I've filed https://ghc.haskell.org/trac/ghc/ticket/14842 for it.
On 09/02/2018 10.24, Simon Peyton Jones via ghc-devs wrote: > At very least the extension should be documented! Would you like to open > a ticket for that? And even offer a patch? _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
