#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 Simon Peyton Jones <simonpj@…>): In [changeset:"4d031cf91c5eed9b162703daee274bbbe94bdc42/ghc" 4d031cf/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="4d031cf91c5eed9b162703daee274bbbe94bdc42" Improve piResultTys and friends Several things here: * Re-implement piResultTys so that its substitution has the correct in-scope set That means paying close attention to performance, since as we discovered in Trac #11371, it's a heavily used function and is often used on ordinary function types, with no foralls to worry about substituting. * Kill off applyTys, which was just the same as piResultTys. * Re-engineer MkCore.mkCoreApps so that it calls piResultTys, rather than repeatedly calling piResultTy. }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11371#comment:49> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler