#9611: Suggest the cause of "No instance" errors involving multiple versions of a package -------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Yuras Type: feature request | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1919 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ben Gamari <ben@…>): In [changeset:"5fc06b97b320e98febaa925085dac03e5b01fc5a/ghc" 5fc06b9/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="5fc06b97b320e98febaa925085dac03e5b01fc5a" Suggest candidate instances in error message See Trac #9611. In "No instance..." error message we suggest instances for other types with the same occ name. It is usefull e.g. when we have two different versions of the same package installed. Test Plan: typecheck/should_fail/tcfail224 Reviewers: austin, bgamari Reviewed By: bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1919 GHC Trac Issues: #9611 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9611#comment:5> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler