{"action":"created","issue":{"url":"https://api.github.com/repos/servo/servo/issues/20106","repository_url":"https://api.github.com/repos/servo/servo","labels_url":"https://api.github.com/repos/servo/servo/issues/20106/labels{/name}","comments_url":"https://api.github.com/repos/servo/servo/issues/20106/comments","events_url":"https://api.github.com/repos/servo/servo/issues/20106/events","html_url":"https://github.com/servo/servo/pull/20106","id":299406632,"number":20106,"title":"Add font cache debugging to isolate cause of IPC failures in CI.","user":{"login":"jdm","id":27658,"avatar_url":"https://avatars1.githubusercontent.com/u/27658?v=4","gravatar_id":"","url":"https://api.github.com/users/jdm","html_url":"https://github.com/jdm","followers_url":"https://api.github.com/users/jdm/followers","following_url":"https://api.github.com/users/jdm/following{/other_user}","gists_url":"https://api.github.com/users/jdm/gists{/gist_id}","starred_url":"https://api.github.com/users/jdm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jdm/subscriptions","organizations_url":"https://api.github.com/users/jdm/orgs","repos_url":"https://api.github.com/users/jdm/repos","events_url":"https://api.github.com/users/jdm/events{/privacy}","received_events_url":"https://api.github.com/users/jdm/received_events","type":"User","site_admin":false},"labels":[{"id":155503129,"url":"https://api.github.com/repos/servo/servo/labels/S-awaiting-merge","name":"S-awaiting-merge","color":"d4c5f9","default":false}],"state":"open","locked":false,"assignee":{"login":"emilio","id":1323194,"avatar_url":"https://avatars1.githubusercontent.com/u/1323194?v=4","gravatar_id":"","url":"https://api.github.com/users/emilio","html_url":"https://github.com/emilio","followers_url":"https://api.github.com/users/emilio/followers","following_url":"https://api.github.com/users/emilio/following{/other_user}","gists_url":"https://api.github.com/users/emilio/gists{/gist_id}","starred_url":"https://api.github.com/users/emilio/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/emilio/subscriptions","organizations_url":"https://api.github.com/users/emilio/orgs","repos_url":"https://api.github.com/users/emilio/repos","events_url":"https://api.github.com/users/emilio/events{/privacy}","received_events_url":"https://api.github.com/users/emilio/received_events","type":"User","site_admin":false},"assignees":[{"login":"emilio","id":1323194,"avatar_url":"https://avatars1.githubusercontent.com/u/1323194?v=4","gravatar_id":"","url":"https://api.github.com/users/emilio","html_url":"https://github.com/emilio","followers_url":"https://api.github.com/users/emilio/followers","following_url":"https://api.github.com/users/emilio/following{/other_user}","gists_url":"https://api.github.com/users/emilio/gists{/gist_id}","starred_url":"https://api.github.com/users/emilio/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/emilio/subscriptions","organizations_url":"https://api.github.com/users/emilio/orgs","repos_url":"https://api.github.com/users/emilio/repos","events_url":"https://api.github.com/users/emilio/events{/privacy}","received_events_url":"https://api.github.com/users/emilio/received_events","type":"User","site_admin":false}],"milestone":null,"comments":9,"created_at":"2018-02-22T15:54:49Z","updated_at":"2018-02-22T18:34:51Z","closed_at":null,"author_association":"MEMBER","pull_request":{"url":"https://api.github.com/repos/servo/servo/pulls/20106","html_url":"https://github.com/servo/servo/pull/20106","diff_url":"https://github.com/servo/servo/pull/20106.diff","patch_url":"https://github.com/servo/servo/pull/20106.patch"},"body":"This should help us better understand the actual underlying cause of frequent CI failures like #13509. In particular, we will be able to state with confidence whether an IPC message is being dropped while the font cache thread is still alive, or whether the dropped sender was in a message that was in the queue after the font cache thread was shutdown.\r\n\r\n---\r\n- [x] `./mach build -d` does not report any errors\r\n- [x] `./mach test-tidy` does not report any errors\r\n- [x] There are tests for these changes\n\n<!-- Reviewable:start -->\n---\nThis change is [<img src=\"https://reviewable.io/review_button.svg\" height=\"34\" align=\"absmiddle\" alt=\"Reviewable\"/>](https://reviewable.io/reviews/servo/servo/20106)\n<!-- Reviewable:end -->\n"},"comment":{"url":"https://api.github.com/repos/servo/servo/issues/comments/367777106","html_url":"https://github.com/servo/servo/pull/20106#issuecomment-367777106","issue_url":"https://api.github.com/repos/servo/servo/issues/20106","id":367777106,"user":{"login":"bors-servo","id":4368172,"avatar_url":"https://avatars1.githubusercontent.com/u/4368172?v=4","gravatar_id":"","url":"https://api.github.com/users/bors-servo","html_url":"https://github.com/bors-servo","followers_url":"https://api.github.com/users/bors-servo/followers","following_url":"https://api.github.com/users/bors-servo/following{/other_user}","gists_url":"https://api.github.com/users/bors-servo/gists{/gist_id}","starred_url":"https://api.github.com/users/bors-servo/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bors-servo/subscriptions","organizations_url":"https://api.github.com/users/bors-servo/orgs","repos_url":"https://api.github.com/users/bors-servo/repos","events_url":"https://api.github.com/users/bors-servo/events{/privacy}","received_events_url":"https://api.github.com/users/bors-servo/received_events","type":"User","site_admin":false},"created_at":"2018-02-22T18:34:51Z","updated_at":"2018-02-22T18:34:51Z","author_association":"CONTRIBUTOR","body":":sunny: Test successful - [android](http://build.servo.org/builders/android/builds/10823), [arm32](http://build.servo.org/builders/arm32/builds/11063), [arm64](http://build.servo.org/builders/arm64/builds/11092), [linux-dev](http://build.servo.org/builders/linux-dev/builds/11126), [linux-rel-css](http://build.servo.org/builders/linux-rel-css/builds/8002), [linux-rel-wpt](http://build.servo.org/builders/linux-rel-wpt/builds/8016), [mac-dev-unit](http://build.servo.org/builders/mac-dev-unit/builds/11188), [mac-rel-css1](http://build.servo.org/builders/mac-rel-css1/builds/3587), [mac-rel-css2](http://build.servo.org/builders/mac-rel-css2/builds/3610), [mac-rel-wpt1](http://build.servo.org/builders/mac-rel-wpt1/builds/7854), [mac-rel-wpt2](http://build.servo.org/builders/mac-rel-wpt2/builds/7924), [mac-rel-wpt3](http://build.servo.org/builders/mac-rel-wpt3/builds/3686), [mac-rel-wpt4](http://build.servo.org/builders/mac-rel-wpt4/builds/3630), [windows-msvc-dev](http://build.servo.org/builders/windows-msvc-dev/builds/6510)\nApproved by: emilio\nPushing 267f9db314acc6641c896a595a24fbb18da74459 to master..."}}
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