#14238: `:kind` suppresses visible dependent quantifiers by default in GHCi 8.2.1 -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler (Type | Version: 8.2.1 checker) | Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect result | Unknown/Multiple at runtime | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4564 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ryan Scott <ryan.gl.scott@…>): In [changeset:"718a018128a0ba2ae20001c10bc8ca4d929a1d33/ghc" 718a0181/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="718a018128a0ba2ae20001c10bc8ca4d929a1d33" Fix #14238 by always pretty-printing visible tyvars Summary: Before, GHC would never print visible tyvars in the absence of `-fprint-explicit-foralls`, which led to `:kind` displaying incorrect kinds in GHCi. The fix is simple—simply check beforehand if any of the type variable binders are required when deciding when to pretty-print them. Test Plan: make test TEST=T14238 Reviewers: simonpj, goldfire, bgamari Subscribers: thomie, carter GHC Trac Issues: #14238 Differential Revision: https://phabricator.haskell.org/D4564 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14238#comment:4> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler