Re: [GHC] #12615: Record pattern synonyms cause spurious name shadowing warnings

#12615: Record pattern synonyms cause spurious name shadowing warnings -------------------------------------+------------------------------------- Reporter: gelisam | Owner: mpickering Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: | PatternSynonyms Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | patsyn/should_compile/T12615 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2545 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"1851349acd9e73f1c18d68f70d5cf7b46a843cb5/ghc" 1851349a/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="1851349acd9e73f1c18d68f70d5cf7b46a843cb5" Don't warn about name shadowing when renaming the patten in a PatSyn decl Previously the renamer assumed that *any* time we renamed a pattern, the pattern was introducing new binders. This isn't true in pattern synonym declarations where the pattern is used as part of a definition. We add a special case to not warn in this situation. Reviewers: simonpj, austin, bgamari Reviewed By: simonpj Subscribers: simonpj, thomie Differential Revision: https://phabricator.haskell.org/D2545 GHC Trac Issues: #12615 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12615#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler