{"action":"opened","issue":{"url":"https://api.github.com/repos/letsencrypt/boulder/issues/1819","repository_url":"https://api.github.com/repos/letsencrypt/boulder","labels_url":"https://api.github.com/repos/letsencrypt/boulder/issues/1819/labels{/name}","comments_url":"https://api.github.com/repos/letsencrypt/boulder/issues/1819/comments","events_url":"https://api.github.com/repos/letsencrypt/boulder/issues/1819/events","html_url":"https://github.com/letsencrypt/boulder/issues/1819","id":154630482,"number":1819,"title":"Race condition in IPv6 lookup","user":{"login":"jsha","id":220205,"avatar_url":"https://avatars.githubusercontent.com/u/220205?v=3","gravatar_id":"","url":"https://api.github.com/users/jsha","html_url":"https://github.com/jsha","followers_url":"https://api.github.com/users/jsha/followers","following_url":"https://api.github.com/users/jsha/following{/other_user}","gists_url":"https://api.github.com/users/jsha/gists{/gist_id}","starred_url":"https://api.github.com/users/jsha/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jsha/subscriptions","organizations_url":"https://api.github.com/users/jsha/orgs","repos_url":"https://api.github.com/users/jsha/repos","events_url":"https://api.github.com/users/jsha/events{/privacy}","received_events_url":"https://api.github.com/users/jsha/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-05-13T04:12:54Z","updated_at":"2016-05-13T04:12:54Z","closed_at":null,"body":"In https://github.com/letsencrypt/boulder/commit/339405bcb91d1f57749322db2b08949abf13edc7#diff-b2299ab3eb8fc156c3c38dc04c63823cR346, when IPv6 lookups are enabled, it's possible for the first wg.Done() to get called before the second wg.Add() gets called, terminating the wg.Wait() early."}}