#12045: Visible kind application -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: mnguyen Type: feature request | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: | Keywords: | TypeApplications TypeInType | GHCProposal Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: 14579 Related Tickets: #15782 | Differential Rev(s): Phab:D5229 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Richard Eisenberg <rae@…>): In [changeset:"74ed9c1c1b26971133c7166663b9c966d2eaca08/ghc" 74ed9c1c/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="74ed9c1c1b26971133c7166663b9c966d2eaca08" Actually fail in failIfEmitsConstraints The function TcHsType.failIfEmitsConstraints says that it fails. It even does so in its name. But it didn't! It *reported* constraints but didn't fail. Now it does. This is important in tcHsClsInstType; see the comments therein. This was discovered while looking at #15797, but that ticket requires visible kind application to exhibit the bug; the test case will come with the patch for #12045. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12045#comment:21> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler