{"action":"created","issue":{"url":"https://api.github.com/repos/mozilla/rr/issues/1727","repository_url":"https://api.github.com/repos/mozilla/rr","labels_url":"https://api.github.com/repos/mozilla/rr/issues/1727/labels{/name}","comments_url":"https://api.github.com/repos/mozilla/rr/issues/1727/comments","events_url":"https://api.github.com/repos/mozilla/rr/issues/1727/events","html_url":"https://github.com/mozilla/rr/issues/1727","id":159259345,"number":1727,"title":"crash when using reverse-cont in Firefox replay session","user":{"login":"mjfroman","id":10492031,"avatar_url":"https://avatars.githubusercontent.com/u/10492031?v=3","gravatar_id":"","url":"https://api.github.com/users/mjfroman","html_url":"https://github.com/mjfroman","followers_url":"https://api.github.com/users/mjfroman/followers","following_url":"https://api.github.com/users/mjfroman/following{/other_user}","gists_url":"https://api.github.com/users/mjfroman/gists{/gist_id}","starred_url":"https://api.github.com/users/mjfroman/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mjfroman/subscriptions","organizations_url":"https://api.github.com/users/mjfroman/orgs","repos_url":"https://api.github.com/users/mjfroman/repos","events_url":"https://api.github.com/users/mjfroman/events{/privacy}","received_events_url":"https://api.github.com/users/mjfroman/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":12,"created_at":"2016-06-08T20:09:23Z","updated_at":"2016-09-22T10:26:07Z","closed_at":null,"body":"Debugging Firefox, I can repeatedly get the following assert/crash:\r\n[FATAL /home/mfroman/rr/rr/src/Task.cc:2021:write_bytes_helper() errno: EIO]\r\n (task 19627 (rec:19195) at time 820829)\r\n -> Assertion `nwritten == buf_size' failed to hold. Should have written 614400 bytes to 0x7f30c1e68000, but only wrote -1\r\n\r\nLinux 4.2.0-36-generic #42~14.04.1-Ubuntu SMP Fri May 13 17:27:22 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux\r\nI'm on the lastest git commit for rr (3710623f9fbec963a8f8096092de1240f82a0091).\r\nDebugging on mozilla-central changeset: d98f20c25fee\r\n./mach run --debugger=rr https://web.ciscospark.com\r\nI start a call on spark (currently debugging a video freeze), and then quit after I see the freeze.\r\nrr replay\r\nb rtcp_utility.cc:1516\r\nb rtcp_receiver.cc:1107\r\nc\r\nc\r\nreverse-cont\r\nboom!\r\n\r\nLet me know if you need additional info, or if I can clarify anything."},"comment":{"url":"https://api.github.com/repos/mozilla/rr/issues/comments/248864387","html_url":"https://github.com/mozilla/rr/issues/1727#issuecomment-248864387","issue_url":"https://api.github.com/repos/mozilla/rr/issues/1727","id":248864387,"user":{"login":"rocallahan","id":296135,"avatar_url":"https://avatars.githubusercontent.com/u/296135?v=3","gravatar_id":"","url":"https://api.github.com/users/rocallahan","html_url":"https://github.com/rocallahan","followers_url":"https://api.github.com/users/rocallahan/followers","following_url":"https://api.github.com/users/rocallahan/following{/other_user}","gists_url":"https://api.github.com/users/rocallahan/gists{/gist_id}","starred_url":"https://api.github.com/users/rocallahan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rocallahan/subscriptions","organizations_url":"https://api.github.com/users/rocallahan/orgs","repos_url":"https://api.github.com/users/rocallahan/repos","events_url":"https://api.github.com/users/rocallahan/events{/privacy}","received_events_url":"https://api.github.com/users/rocallahan/received_events","type":"User","site_admin":false},"created_at":"2016-09-22T10:26:07Z","updated_at":"2016-09-22T10:26:07Z","body":"Try using rr -F to force the emergency debugger.\r\n\r\nMaybe rr is pulling in the wrong xdebug.so.  During replay, if you check /proc/<pid>/maps for the process, what lines does it have for xdebug.so?"}}
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