{"action":"created","issue":{"url":"https://api.github.com/repos/emberjs/ember.js/issues/16503","repository_url":"https://api.github.com/repos/emberjs/ember.js","labels_url":"https://api.github.com/repos/emberjs/ember.js/issues/16503/labels{/name}","comments_url":"https://api.github.com/repos/emberjs/ember.js/issues/16503/comments","events_url":"https://api.github.com/repos/emberjs/ember.js/issues/16503/events","html_url":"https://github.com/emberjs/ember.js/issues/16503","id":313576177,"number":16503,"title":"Uncaught TypeError: Cannot read property 'syscall' of null","user":{"login":"nullrocket","id":906243,"avatar_url":"https://avatars1.githubusercontent.com/u/906243?v=4","gravatar_id":"","url":"https://api.github.com/users/nullrocket","html_url":"https://github.com/nullrocket","followers_url":"https://api.github.com/users/nullrocket/followers","following_url":"https://api.github.com/users/nullrocket/following{/other_user}","gists_url":"https://api.github.com/users/nullrocket/gists{/gist_id}","starred_url":"https://api.github.com/users/nullrocket/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nullrocket/subscriptions","organizations_url":"https://api.github.com/users/nullrocket/orgs","repos_url":"https://api.github.com/users/nullrocket/repos","events_url":"https://api.github.com/users/nullrocket/events{/privacy}","received_events_url":"https://api.github.com/users/nullrocket/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":22,"created_at":"2018-04-12T04:51:34Z","updated_at":"2018-04-20T18:31:03Z","closed_at":null,"author_association":"NONE","body":"I have been banging my head against this every time I try to update from 3.0.0 to any >= 3.1 version beta or final.   \r\nIt happens after transitioning in and out of a particular route exactly 3 times.  Unfortunately I'm unable to create a reproduction except in this application and the stacktrace doesn't point to anything I can dig into.   Any idea where I can start looking?\r\n  \r\n``` javascript\r\nAppendOpcodes.prototype.evaluate = function evaluate(vm$$1, opcode, type) {\r\n            var operation = this.evaluateOpcode[type];\r\n             if (operation.syscall) {  // here is where it errors.  type argument is 0\r\n                operation.evaluate(vm$$1, opcode);\r\n            } else {\r\n                operation.evaluate(vm$$1.inner, opcode);\r\n            }\r\n        };"},"comment":{"url":"https://api.github.com/repos/emberjs/ember.js/issues/comments/383183860","html_url":"https://github.com/emberjs/ember.js/issues/16503#issuecomment-383183860","issue_url":"https://api.github.com/repos/emberjs/ember.js/issues/16503","id":383183860,"user":{"login":"rwjblue","id":12637,"avatar_url":"https://avatars0.githubusercontent.com/u/12637?v=4","gravatar_id":"","url":"https://api.github.com/users/rwjblue","html_url":"https://github.com/rwjblue","followers_url":"https://api.github.com/users/rwjblue/followers","following_url":"https://api.github.com/users/rwjblue/following{/other_user}","gists_url":"https://api.github.com/users/rwjblue/gists{/gist_id}","starred_url":"https://api.github.com/users/rwjblue/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rwjblue/subscriptions","organizations_url":"https://api.github.com/users/rwjblue/orgs","repos_url":"https://api.github.com/users/rwjblue/repos","events_url":"https://api.github.com/users/rwjblue/events{/privacy}","received_events_url":"https://api.github.com/users/rwjblue/received_events","type":"User","site_admin":false},"created_at":"2018-04-20T18:31:03Z","updated_at":"2018-04-20T18:31:03Z","author_association":"OWNER","body":"Awesome, thank you very much @nullrocket!"}}
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