Bustle/UI.hs:490:3: error:
    • No instance for (Control.Monad.Fail.MonadFail
                         (Bustle BConfig BState))
        arising from a do statement
        with the failable pattern ‘[openItem, openTwoItem]’
    • In a stmt of a 'do' block:
        [openItem, openTwoItem] <- mapM
                                     (getW castToMenuItem) ["open", "openTwo"]
      In the expression:
        do builder <- io builderNew
           io
             $ builderAddFromFile builder =<< getDataFileName "data/bustle.ui"
           let getW cast name = io $ builderGetObject builder cast name
           window <- getW castToWindow "diagramWindow"
           ....
      In an equation for ‘emptyWindow’:
          emptyWindow
            = do builder <- io builderNew
                 io
                   $ builderAddFromFile builder =<< getDataFileName "data/bustle.ui"
                 let getW cast name = ...
                 ....
    |
490 |   [openItem, openTwoItem] <- mapM (getW castToMenuItem) ["open", "openTwo"]
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^