#9440: Buggy binder swap in occurrence analysis -------------------------------------+------------------------------------- Reporter: afarmer | Owner: Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: | Blocking: | Differential Revisions: Phab:D156 | -------------------------------------+------------------------------------- Comment (by simonpj): That's terrible! Than you for spotting this. Re (a), I'm not sure how convenient it is to check that `x` is free in `C vs -> rhs`. Perhaps it is easy. But if not, you could instead just check that `x` is not in `vs`. That could conveniently be done with checking (b). Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9440#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler