#15139: EmptyCase produces incorrect SrcSpans -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.4.2 (Parser) | Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Poor/confusing | Unknown/Multiple error message | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4685 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ryan Scott <ryan.gl.scott@…>): In [changeset:"78db41eaa806206001b80b3d225cd254435a2f83/ghc" 78db41e/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="78db41eaa806206001b80b3d225cd254435a2f83" Use correct source spans for EmptyCase Summary: The parser's calculation of source spans for `EmptyCase` expressions was a bit off, leading to some wonky-looking error messages. Easily fixed with some uses of `comb3` and `sLL`. Test Plan: make test TEST=T15139 Reviewers: bgamari, simonpj Reviewed By: simonpj Subscribers: simonpj, rwbarton, thomie, mpickering, carter GHC Trac Issues: #15139 Differential Revision: https://phabricator.haskell.org/D4685 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15139#comment:2> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler