#11371: Bogus in-scope set in substitutions -------------------------------------+------------------------------------- Reporter: simonpj | Owner: niteria Type: bug | Status: new Priority: high | Milestone: 8.2.1 Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11360 | Differential Rev(s): phab:D1792, Wiki Page: | phab:D1801, phab:D1802 -------------------------------------+------------------------------------- Comment (by Bartosz Nitka <niteria@…>): In [changeset:"144ddb414a8a4f40df1ad9ab27fcdf38f30db4d3/ghc" 144ddb41/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="144ddb414a8a4f40df1ad9ab27fcdf38f30db4d3" Construct in_scope set in mkTopTCvSubst The pre-condition on `mkTopTCvSubst` turned out to be wrong and not satisfied by any of the callers. I've fixed it, so that it constructs the in_scope set from the range of the substitution. `mkTopTCvSubst` was also unnecessarily general it is never called with `CoVars`, so I changed the type signature and added an assertion. Test Plan: ./validate --slow Reviewers: goldfire, simonpj, bgamari, austin Reviewed By: simonpj Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1801 GHC Trac Issues: #11371 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11371#comment:14> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler