{"action":"created","issue":{"url":"https://api.github.com/repos/rust-lang/rust/issues/35718","repository_url":"https://api.github.com/repos/rust-lang/rust","labels_url":"https://api.github.com/repos/rust-lang/rust/issues/35718/labels{/name}","comments_url":"https://api.github.com/repos/rust-lang/rust/issues/35718/comments","events_url":"https://api.github.com/repos/rust-lang/rust/issues/35718/events","html_url":"https://github.com/rust-lang/rust/pull/35718","id":171449649,"number":35718,"title":"Implement synchronization scheme for incr. comp. directory","user":{"login":"michaelwoerister","id":1825894,"avatar_url":"https://avatars.githubusercontent.com/u/1825894?v=3","gravatar_id":"","url":"https://api.github.com/users/michaelwoerister","html_url":"https://github.com/michaelwoerister","followers_url":"https://api.github.com/users/michaelwoerister/followers","following_url":"https://api.github.com/users/michaelwoerister/following{/other_user}","gists_url":"https://api.github.com/users/michaelwoerister/gists{/gist_id}","starred_url":"https://api.github.com/users/michaelwoerister/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/michaelwoerister/subscriptions","organizations_url":"https://api.github.com/users/michaelwoerister/orgs","repos_url":"https://api.github.com/users/michaelwoerister/repos","events_url":"https://api.github.com/users/michaelwoerister/events{/privacy}","received_events_url":"https://api.github.com/users/michaelwoerister/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"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},"assignees":[{"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}],"milestone":null,"comments":48,"created_at":"2016-08-16T15:48:11Z","updated_at":"2016-08-30T19:57:43Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/rust-lang/rust/pulls/35718","html_url":"https://github.com/rust-lang/rust/pull/35718","diff_url":"https://github.com/rust-lang/rust/pull/35718.diff","patch_url":"https://github.com/rust-lang/rust/pull/35718.patch"},"body":"This PR implements a copy-on-write-based synchronization scheme for the incremental compilation cache directory. For technical details, see the documentation at the beginning of `rustc_incremental/persist/fs.rs`.\r\n\r\nThe PR contains unit tests for some functions but for testing whether the scheme properly handles races, a more elaborate test setup would be needed. It would probably involve a small tool that allows to manipulate the incremental compilation directory in a controlled way and then letting a compiler instance run against directories in different states. I don't know if it's worth the trouble of adding another test category to `compiletest`, but I'd be happy to do so.\r\n\r\nFixes #32754\r\nFixes #34957"},"comment":{"url":"https://api.github.com/repos/rust-lang/rust/issues/comments/243559693","html_url":"https://github.com/rust-lang/rust/pull/35718#issuecomment-243559693","issue_url":"https://api.github.com/repos/rust-lang/rust/issues/35718","id":243559693,"user":{"login":"alexcrichton","id":64996,"avatar_url":"https://avatars.githubusercontent.com/u/64996?v=3","gravatar_id":"","url":"https://api.github.com/users/alexcrichton","html_url":"https://github.com/alexcrichton","followers_url":"https://api.github.com/users/alexcrichton/followers","following_url":"https://api.github.com/users/alexcrichton/following{/other_user}","gists_url":"https://api.github.com/users/alexcrichton/gists{/gist_id}","starred_url":"https://api.github.com/users/alexcrichton/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alexcrichton/subscriptions","organizations_url":"https://api.github.com/users/alexcrichton/orgs","repos_url":"https://api.github.com/users/alexcrichton/repos","events_url":"https://api.github.com/users/alexcrichton/events{/privacy}","received_events_url":"https://api.github.com/users/alexcrichton/received_events","type":"User","site_admin":false},"created_at":"2016-08-30T19:57:43Z","updated_at":"2016-08-30T19:57:43Z","body":"@bors: retry force clean\r\n\r\n* restarted buildbot"}}
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