{"action":"created","issue":{"url":"https://api.github.com/repos/rust-lang/rust/issues/20304","labels_url":"https://api.github.com/repos/rust-lang/rust/issues/20304/labels{/name}","comments_url":"https://api.github.com/repos/rust-lang/rust/issues/20304/comments","events_url":"https://api.github.com/repos/rust-lang/rust/issues/20304/events","html_url":"https://github.com/rust-lang/rust/issues/20304","id":53046383,"number":20304,"title":"cache the results of type projection and normalization","user":{"login":"nikomatsakis","id":155238,"avatar_url":"https://avatars.githubusercontent.com/u/155238?v=3","gravatar_id":"","url":"https://api.github.com/users/nikomatsakis","html_url":"https://github.com/nikomatsakis","followers_url":"https://api.github.com/users/nikomatsakis/followers","following_url":"https://api.github.com/users/nikomatsakis/following{/other_user}","gists_url":"https://api.github.com/users/nikomatsakis/gists{/gist_id}","starred_url":"https://api.github.com/users/nikomatsakis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nikomatsakis/subscriptions","organizations_url":"https://api.github.com/users/nikomatsakis/orgs","repos_url":"https://api.github.com/users/nikomatsakis/repos","events_url":"https://api.github.com/users/nikomatsakis/events{/privacy}","received_events_url":"https://api.github.com/users/nikomatsakis/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/rust-lang/rust/labels/A-associated-items","name":"A-associated-items","color":"d7e102"},{"url":"https://api.github.com/repos/rust-lang/rust/labels/I-cleanup","name":"I-cleanup","color":"e10c02"},{"url":"https://api.github.com/repos/rust-lang/rust/labels/I-compiletime","name":"I-compiletime","color":"e11d21"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2014-12-29T15:02:23Z","updated_at":"2015-11-26T21:14:41Z","closed_at":null,"body":"Both in trans and in typeck. Must be somewhat careful around type parameters and so forth. Probably we want to introduce a cache onto the fulfillment context to use for normalization as well."},"comment":{"url":"https://api.github.com/repos/rust-lang/rust/issues/comments/159994835","html_url":"https://github.com/rust-lang/rust/issues/20304#issuecomment-159994835","issue_url":"https://api.github.com/repos/rust-lang/rust/issues/20304","id":159994835,"user":{"login":"jonas-schievink","id":1786438,"avatar_url":"https://avatars.githubusercontent.com/u/1786438?v=3","gravatar_id":"","url":"https://api.github.com/users/jonas-schievink","html_url":"https://github.com/jonas-schievink","followers_url":"https://api.github.com/users/jonas-schievink/followers","following_url":"https://api.github.com/users/jonas-schievink/following{/other_user}","gists_url":"https://api.github.com/users/jonas-schievink/gists{/gist_id}","starred_url":"https://api.github.com/users/jonas-schievink/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jonas-schievink/subscriptions","organizations_url":"https://api.github.com/users/jonas-schievink/orgs","repos_url":"https://api.github.com/users/jonas-schievink/repos","events_url":"https://api.github.com/users/jonas-schievink/events{/privacy}","received_events_url":"https://api.github.com/users/jonas-schievink/received_events","type":"User","site_admin":false},"created_at":"2015-11-26T21:14:41Z","updated_at":"2015-11-26T21:14:41Z","body":"@drbo [FulfillmentContext::normalize_projection_type](https://github.com/rust-lang/rust/blob/fe6ad097c654d2655ad11610b2c96d577a3fcc2b/src/librustc/middle/traits/fulfill.rs#L151)"}}