{"action":"created","issue":{"url":"https://api.github.com/repos/mit-cml/appinventor-sources/issues/394","labels_url":"https://api.github.com/repos/mit-cml/appinventor-sources/issues/394/labels{/name}","comments_url":"https://api.github.com/repos/mit-cml/appinventor-sources/issues/394/comments","events_url":"https://api.github.com/repos/mit-cml/appinventor-sources/issues/394/events","html_url":"https://github.com/mit-cml/appinventor-sources/issues/394","id":81688817,"number":394,"title":"Faulty check for empty slot?","user":{"login":"halatmit","id":789431,"avatar_url":"https://avatars.githubusercontent.com/u/789431?v=3","gravatar_id":"","url":"https://api.github.com/users/halatmit","html_url":"https://github.com/halatmit","followers_url":"https://api.github.com/users/halatmit/followers","following_url":"https://api.github.com/users/halatmit/following{/other_user}","gists_url":"https://api.github.com/users/halatmit/gists{/gist_id}","starred_url":"https://api.github.com/users/halatmit/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/halatmit/subscriptions","organizations_url":"https://api.github.com/users/halatmit/orgs","repos_url":"https://api.github.com/users/halatmit/repos","events_url":"https://api.github.com/users/halatmit/events{/privacy}","received_events_url":"https://api.github.com/users/halatmit/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-05-28T00:32:40Z","updated_at":"2015-05-31T02:08:25Z","closed_at":null,"body":"I just looked at a project that contains the following block:\r\n\r\n![screen shot 2015-05-27 at 8 17 10 pm](https://cloud.githubusercontent.com/assets/789431/7850343/efba5566-04ae-11e5-98ec-db126b8bac1d.png)\r\n\r\nIn the blocks editor, there was no red triangle, and I was able to select build, which then generated an error about the Yail procedure being called with the wrong number of arguments.\r\n\r\nWhy was the empty slot not detected?   By the way, the project is in the gallery as\r\nCarRacing 2.   To duplicate the error, download the aia and try to build it.\r\n\r\n\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/mit-cml/appinventor-sources/issues/comments/107110536","html_url":"https://github.com/mit-cml/appinventor-sources/issues/394#issuecomment-107110536","issue_url":"https://api.github.com/repos/mit-cml/appinventor-sources/issues/394","id":107110536,"user":{"login":"halatmit","id":789431,"avatar_url":"https://avatars.githubusercontent.com/u/789431?v=3","gravatar_id":"","url":"https://api.github.com/users/halatmit","html_url":"https://github.com/halatmit","followers_url":"https://api.github.com/users/halatmit/followers","following_url":"https://api.github.com/users/halatmit/following{/other_user}","gists_url":"https://api.github.com/users/halatmit/gists{/gist_id}","starred_url":"https://api.github.com/users/halatmit/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/halatmit/subscriptions","organizations_url":"https://api.github.com/users/halatmit/orgs","repos_url":"https://api.github.com/users/halatmit/repos","events_url":"https://api.github.com/users/halatmit/events{/privacy}","received_events_url":"https://api.github.com/users/halatmit/received_events","type":"User","site_admin":false},"created_at":"2015-05-31T02:08:25Z","updated_at":"2015-05-31T02:08:25Z","body":"Jeff and I looked at this, and it seems that the real problem is that you can build or run do-it when there are warnings.  In this case, and empty slot produces a warning (not an error).\r\nSo the fix would be to not allow those builds or do-its."}}