#11821: Internal error: not in scope during type checking, but it passed the renamer -------------------------------------+------------------------------------- Reporter: darchon | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: 8.0.2 Component: Compiler | Version: 8.0.1-rc3 Resolution: fixed | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: GHC rejects | Test Case: valid program | polykinds/T11821, polykinds/T11821a Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2146 Wiki Page: | -------------------------------------+------------------------------------- Comment (by mietek): I can still trigger the same internal error in GHC 8.0.2 with the following, admittedly silly example: {{{ {-# LANGUAGE TypeInType #-} data X :: Y where Y :: X }}} The error message is: {{{ Bug.hs:2:11: error: … • GHC internal error: ‘Y’ is not in scope during type checking, but it passed the renamer tcl_env of environment: [r1cR :-> APromotionErr TyConPE] • In the kind ‘Y’ }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11821#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler