{"action":"created","issue":{"url":"https://api.github.com/repos/paulirish/mutation-summary/issues/25","labels_url":"https://api.github.com/repos/paulirish/mutation-summary/issues/25/labels{/name}","comments_url":"https://api.github.com/repos/paulirish/mutation-summary/issues/25/comments","events_url":"https://api.github.com/repos/paulirish/mutation-summary/issues/25/events","html_url":"https://github.com/paulirish/mutation-summary/issues/25","id":58309995,"number":25,"title":"crash in MutationProjection.attributeChangedNodes","user":{"login":"GoogleCodeExporter","id":9614759,"avatar_url":"https://avatars.githubusercontent.com/u/9614759?v=3","gravatar_id":"","url":"https://api.github.com/users/GoogleCodeExporter","html_url":"https://github.com/GoogleCodeExporter","followers_url":"https://api.github.com/users/GoogleCodeExporter/followers","following_url":"https://api.github.com/users/GoogleCodeExporter/following{/other_user}","gists_url":"https://api.github.com/users/GoogleCodeExporter/gists{/gist_id}","starred_url":"https://api.github.com/users/GoogleCodeExporter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/GoogleCodeExporter/subscriptions","organizations_url":"https://api.github.com/users/GoogleCodeExporter/orgs","repos_url":"https://api.github.com/users/GoogleCodeExporter/repos","events_url":"https://api.github.com/users/GoogleCodeExporter/events{/privacy}","received_events_url":"https://api.github.com/users/GoogleCodeExporter/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/paulirish/mutation-summary/labels/auto-migrated","name":"auto-migrated","color":"ededed"},{"url":"https://api.github.com/repos/paulirish/mutation-summary/labels/Priority-Medium","name":"Priority-Medium","color":"ededed"},{"url":"https://api.github.com/repos/paulirish/mutation-summary/labels/Type-Defect","name":"Type-Defect","color":"ededed"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":7,"created_at":"2015-02-20T04:48:50Z","updated_at":"2015-02-20T04:48:52Z","closed_at":null,"body":"```\nWhat steps will reproduce the problem?\n1. Deploy the library with an \"all\" filter over this page, with Chrome: \nhttp://www.nytimes.com/2013/12/02/technology/e-books-hold-tight-to-features-of-t\nheir-print-predecessors.html?ref=business&_r=3 \n2. Wait for the page to change. (It does, periodically.)\n3. With some luck, you well see the crash\n\nWhat is the expected output? What do you see instead?\n\nI see this stack trace on console:\n\nUncaught TypeError: Cannot read property 'attributes' of undefined\nmutation-summary.js:490\nMutationProjection.attributeChangedNodes mutation-summary.js:490\nSummary mutation-summary.js:781\nMutationSummary.createSummaries mutation-summary.js:1552\nMutationSummary.observerCallback mutation-summary.js:1603\n(anonymous function)\n\nWhat version of the product are you using? On what operating system?\n\n64cb75af (master branch)\n\nPlease provide any additional information below.\n\nSince the callback crashed, we missed a bunch of updates.\n```\n\n-----\nOriginal issue reported on code.google.com by `csil...@hypothes.is` on 11 Dec 2013 at 11:57"},"comment":{"url":"https://api.github.com/repos/paulirish/mutation-summary/issues/comments/75189269","html_url":"https://github.com/paulirish/mutation-summary/issues/25#issuecomment-75189269","issue_url":"https://api.github.com/repos/paulirish/mutation-summary/issues/25","id":75189269,"user":{"login":"GoogleCodeExporter","id":9614759,"avatar_url":"https://avatars.githubusercontent.com/u/9614759?v=3","gravatar_id":"","url":"https://api.github.com/users/GoogleCodeExporter","html_url":"https://github.com/GoogleCodeExporter","followers_url":"https://api.github.com/users/GoogleCodeExporter/followers","following_url":"https://api.github.com/users/GoogleCodeExporter/following{/other_user}","gists_url":"https://api.github.com/users/GoogleCodeExporter/gists{/gist_id}","starred_url":"https://api.github.com/users/GoogleCodeExporter/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/GoogleCodeExporter/subscriptions","organizations_url":"https://api.github.com/users/GoogleCodeExporter/orgs","repos_url":"https://api.github.com/users/GoogleCodeExporter/repos","events_url":"https://api.github.com/users/GoogleCodeExporter/events{/privacy}","received_events_url":"https://api.github.com/users/GoogleCodeExporter/received_events","type":"User","site_admin":false},"created_at":"2015-02-20T04:48:52Z","updated_at":"2015-02-20T04:48:52Z","body":"```\nCan anyone reduce this to a test-case?\n```\n\n-----\nOriginal comment by `rafaelw@chromium.org` on 11 Jan 2014 at 4:29"}}