{"action":"created","issue":{"url":"https://api.github.com/repos/gap-system/gap/issues/404","labels_url":"https://api.github.com/repos/gap-system/gap/issues/404/labels{/name}","comments_url":"https://api.github.com/repos/gap-system/gap/issues/404/comments","events_url":"https://api.github.com/repos/gap-system/gap/issues/404/events","html_url":"https://github.com/gap-system/gap/issues/404","id":122154059,"number":404,"title":"Hall Subgroup cannot be computed?","user":{"login":"hungaborhorvath","id":11720671,"avatar_url":"https://avatars.githubusercontent.com/u/11720671?v=3","gravatar_id":"","url":"https://api.github.com/users/hungaborhorvath","html_url":"https://github.com/hungaborhorvath","followers_url":"https://api.github.com/users/hungaborhorvath/followers","following_url":"https://api.github.com/users/hungaborhorvath/following{/other_user}","gists_url":"https://api.github.com/users/hungaborhorvath/gists{/gist_id}","starred_url":"https://api.github.com/users/hungaborhorvath/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hungaborhorvath/subscriptions","organizations_url":"https://api.github.com/users/hungaborhorvath/orgs","repos_url":"https://api.github.com/users/hungaborhorvath/repos","events_url":"https://api.github.com/users/hungaborhorvath/events{/privacy}","received_events_url":"https://api.github.com/users/hungaborhorvath/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/gap-system/gap/labels/bug","name":"bug","color":"fc2929"}],"state":"closed","locked":false,"assignee":null,"milestone":{"url":"https://api.github.com/repos/gap-system/gap/milestones/5","html_url":"https://github.com/gap-system/gap/milestones/GAP%204.8.1","labels_url":"https://api.github.com/repos/gap-system/gap/milestones/5/labels","id":1386987,"number":5,"title":"GAP 4.8.1","description":"2nd beta release of GAP 4.8","creator":{"login":"alex-konovalov","id":5751387,"avatar_url":"https://avatars.githubusercontent.com/u/5751387?v=3","gravatar_id":"","url":"https://api.github.com/users/alex-konovalov","html_url":"https://github.com/alex-konovalov","followers_url":"https://api.github.com/users/alex-konovalov/followers","following_url":"https://api.github.com/users/alex-konovalov/following{/other_user}","gists_url":"https://api.github.com/users/alex-konovalov/gists{/gist_id}","starred_url":"https://api.github.com/users/alex-konovalov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alex-konovalov/subscriptions","organizations_url":"https://api.github.com/users/alex-konovalov/orgs","repos_url":"https://api.github.com/users/alex-konovalov/repos","events_url":"https://api.github.com/users/alex-konovalov/events{/privacy}","received_events_url":"https://api.github.com/users/alex-konovalov/received_events","type":"User","site_admin":false},"open_issues":6,"closed_issues":9,"state":"open","created_at":"2015-10-31T23:44:44Z","updated_at":"2015-12-15T22:21:37Z","due_on":null,"closed_at":null},"comments":6,"created_at":"2015-12-14T23:13:29Z","updated_at":"2015-12-15T22:21:37Z","closed_at":"2015-12-15T22:21:36Z","body":"The following gives me an error, and I am unsure if this should be happening or not. Could someone help me out with this, please? Thank you.\r\n\r\n    gap> G := Group([ (1,2)(3,4)(5,6)(7,8)(9,10)(11,12)(13,14)(15,16)(17,18)(19,20)(21,22)\r\n    > (23,24)(25,26)(27,28)(29,30), (2,3)(5,6)(8,9)(11,12)(14,15)(17,18)(20,21)\r\n    > (23,24)(26,27)(29,30), (1,5)(6,10)(11,15)(16,20)(21,25)(26,30) ]);\r\n    gap> PrimeDivisors(Size(G));\r\n    [ 2, 3, 5, 7 ]\r\n    gap> pi := [ 5, 7 ];;\r\n    gap> HallSubgroup(G, pi); \r\n    Error, Record: '<rec>.cocycleToList' must have an assigned value in\r\n      N := ocr.cocycleToList( R ); at /home/ghorvath/work/gap/lib/onecohom.gi:1315 called from \r\n    OCOneCocycles( ocr, true \r\n     ); at /home/ghorvath/work/gap/lib/fitfree.gi:1207 called from\r\n    HallsFittingFree( Image( hom ), pi \r\n     ) at /home/ghorvath/work/gap/lib/fitfree.gi:1278 called from\r\n    HallViaRadical( G, pi \r\n     ) at /home/ghorvath/work/gap/lib/fitfree.gi:1348 called from\r\n    <compiled or corrupted statement>  called from\r\n    <function \"local function\">( <arguments> )\r\n     called from read-eval loop at line 15 of *stdin*\r\n    you can 'return;' after assigning a value\r\n    brk> \r\n"},"comment":{"url":"https://api.github.com/repos/gap-system/gap/issues/comments/164915932","html_url":"https://github.com/gap-system/gap/issues/404#issuecomment-164915932","issue_url":"https://api.github.com/repos/gap-system/gap/issues/404","id":164915932,"user":{"login":"alex-konovalov","id":5751387,"avatar_url":"https://avatars.githubusercontent.com/u/5751387?v=3","gravatar_id":"","url":"https://api.github.com/users/alex-konovalov","html_url":"https://github.com/alex-konovalov","followers_url":"https://api.github.com/users/alex-konovalov/followers","following_url":"https://api.github.com/users/alex-konovalov/following{/other_user}","gists_url":"https://api.github.com/users/alex-konovalov/gists{/gist_id}","starred_url":"https://api.github.com/users/alex-konovalov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/alex-konovalov/subscriptions","organizations_url":"https://api.github.com/users/alex-konovalov/orgs","repos_url":"https://api.github.com/users/alex-konovalov/repos","events_url":"https://api.github.com/users/alex-konovalov/events{/privacy}","received_events_url":"https://api.github.com/users/alex-konovalov/received_events","type":"User","site_admin":false},"created_at":"2015-12-15T22:21:36Z","updated_at":"2015-12-15T22:21:36Z","body":"@hulpke thanks - I will close this now. Of course, this backfires now by 4 other commits that you've pushed to the master. They hopefully would not break anything (Magma convertor, export to LaTeX), but otherwise this could lead to some complications....\r\n\r\nIt may be my fault - I should seen this coming and tell you to cherry-pick only one commit from the branch where you're working onto the master branch and then push... But it seems that you were not working on a branch at all - all commits were happening in the master branch of your fork. That could be a problem in the future: if you would be making a pull request, your pull request would have 5 commits belonging to 5 unrelated changes. Instead, a good habit is to work on each logical change on an individual branch, so whenever you want to do something new, call\r\n\r\n```\r\ngit branch name-of-branch\r\ngit checkout name-of-branch\r\n```\r\n\r\nand then work on a branch."}}