{"action":"opened","issue":{"url":"https://api.github.com/repos/robertkrimen/otto/issues/184","repository_url":"https://api.github.com/repos/robertkrimen/otto","labels_url":"https://api.github.com/repos/robertkrimen/otto/issues/184/labels{/name}","comments_url":"https://api.github.com/repos/robertkrimen/otto/issues/184/comments","events_url":"https://api.github.com/repos/robertkrimen/otto/issues/184/events","html_url":"https://github.com/robertkrimen/otto/issues/184","id":152837774,"number":184,"title":"concurrent otto?","user":{"login":"donpdonp","id":13176,"avatar_url":"https://avatars.githubusercontent.com/u/13176?v=3","gravatar_id":"","url":"https://api.github.com/users/donpdonp","html_url":"https://github.com/donpdonp","followers_url":"https://api.github.com/users/donpdonp/followers","following_url":"https://api.github.com/users/donpdonp/following{/other_user}","gists_url":"https://api.github.com/users/donpdonp/gists{/gist_id}","starred_url":"https://api.github.com/users/donpdonp/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/donpdonp/subscriptions","organizations_url":"https://api.github.com/users/donpdonp/orgs","repos_url":"https://api.github.com/users/donpdonp/repos","events_url":"https://api.github.com/users/donpdonp/events{/privacy}","received_events_url":"https://api.github.com/users/donpdonp/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-05-03T18:04:47Z","updated_at":"2016-05-03T18:04:47Z","closed_at":null,"body":"Firstly thanks for this project, its amazing. I'm using otto to evaluate user-provided js. A go routine is exposed to the js environment to allow the user js scripts to make http page loads. Since this is asynchronous, the https reponse comes into a go routine to listen for responses. A callback into the js is executed, and since this is not the main go routine, there is the potential for concurrent access and after a couple days of running that happens. At least thats my take from it based on the error logs.\r\n\r\nIs this simply not advisable with otto?\r\n\r\nit looks like the list/map of properties self.property[name] (from the error on  slash.go:159)  is whats being concurrently accessed.\r\n\r\n```\r\nfatal error: concurrent map read and map write\r\n```\r\nfull error at https://gist.github.com/donpdonp/e22583dce93a709b20ed657e27663582"}}