#13834: Error cascade with type applications -------------------------------------+------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: | TypeApplications, TypeErrorMessages Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #12794 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): As dbaynard noted in https://ghc.haskell.org/trac/ghc/ticket/12092#comment:4, things are even worse on GHC 8.6 than they used to be. That is, while you'd get these errors on GHC 8.4.4: {{{ $ /opt/ghc/8.4.4/bin/ghc -XTypeApplications -e "notInScope @Bool" <interactive>:0:1: error: Variable not in scope: notInScope <interactive>:0:1: error: • Cannot apply expression of type ‘t1’ to a visible type argument ‘Bool’ • In the expression: notInScope @Bool In an equation for ‘it’: it = notInScope @Bool }}} You don't even get the `Variable not in scope` error on GHC 8.6.3: {{{ $ /opt/ghc/8.6.3/bin/ghc -XTypeApplications -e "notInScope @Bool" <interactive>:0:1: error: • Cannot apply expression of type ‘t1’ to a visible type argument ‘Bool’ • In the expression: notInScope @Bool In an equation for ‘it’: it = notInScope @Bool }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13834#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler