Re: [GHC] #15152: Core Lint error in ill-typed GADT code

#15152: Core Lint error in ill-typed GADT code -------------------------------------+------------------------------------- Reporter: tdammers | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11066 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Simon Peyton Jones ): In [changeset:"f49f90bb84b12515366de9b8184644b5c3798901/ghc" f49f90b/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="f49f90bb84b12515366de9b8184644b5c3798901" Tidy up error suppression Trac #15152 showed that when a flag turned an error into a warning, we were still (alas) suppressing subequent errors; includign their essential addTcEvBind. That led (rightly) to a Lint error. This patch fixes it, and incidentally tidies up an ad-hoc special case of out-of-scope variables (see the old binding for 'out_of_scope_killer' in 'tryReporters'). No test, because the problem was only shown up when turning inaccessible code into a warning. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15152#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler