MonadMask require new trait:generalBracket

problem

failed to install the zeromq4-haskell in my system,before system upgrade the ghc package,it work,but it not work now.+

src/System/ZMQ4/Monadic.hs:250:10: warning: [-Wmissing-methods]
    • No explicit implementation for
        ‘generalBracket’
    • In the instance declaration for ‘MonadMask (ZMQ z)’
    |
250 | instance MonadMask (ZMQ z) where
    |          ^^^^^^^^^^^^^^^^^

• ghc-version: The Glorious Glasgow Haskell Compilation System, version 8.6.5
• system: Archlinux Linux Reaker 5.2.11-arch1-1-ARCH #1 (closed) SMP PREEMPT Thu Aug 29 08:09:36 UTC 2019 x86_64 GNU/Linux

ghc in archlinux package is dynamic linked.

solution-maybe

could we add this into src/System/ZMQ4/Monadic.hs at 257 ? it seems solve the problem.

    generalBracket a sucThenResult packMonadResult = ZMQ . ReaderT $ \env ->
      runReaderT (_unzmq$ C.generalBracket a sucThenResult packMonadResult) env

sorry for my poor code and language