{"action":"created","issue":{"url":"https://api.github.com/repos/numerical-mathematics/extrapolation/issues/8","repository_url":"https://api.github.com/repos/numerical-mathematics/extrapolation","labels_url":"https://api.github.com/repos/numerical-mathematics/extrapolation/issues/8/labels{/name}","comments_url":"https://api.github.com/repos/numerical-mathematics/extrapolation/issues/8/comments","events_url":"https://api.github.com/repos/numerical-mathematics/extrapolation/issues/8/events","html_url":"https://github.com/numerical-mathematics/extrapolation/issues/8","id":122965397,"number":8,"title":"Travis CI tests do not pass","user":{"login":"mcr222","id":10033898,"avatar_url":"https://avatars.githubusercontent.com/u/10033898?v=3","gravatar_id":"","url":"https://api.github.com/users/mcr222","html_url":"https://github.com/mcr222","followers_url":"https://api.github.com/users/mcr222/followers","following_url":"https://api.github.com/users/mcr222/following{/other_user}","gists_url":"https://api.github.com/users/mcr222/gists{/gist_id}","starred_url":"https://api.github.com/users/mcr222/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mcr222/subscriptions","organizations_url":"https://api.github.com/users/mcr222/orgs","repos_url":"https://api.github.com/users/mcr222/repos","events_url":"https://api.github.com/users/mcr222/events{/privacy}","received_events_url":"https://api.github.com/users/mcr222/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/numerical-mathematics/extrapolation/labels/major","name":"major","color":"eb6420"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-12-18T15:13:27Z","updated_at":"2016-02-14T13:22:27Z","closed_at":null,"body":"The new tests include: regression tests (dense and not dense), convergence\r\ntests (dense and not dense), interpolation polynomials convergence test\r\nand interpolation derivatives convergence test.\r\n\r\nThe regression tests for euler semi-implicit do no pass in Travis (in local machine they pass), concretely test 2 for dense output. I have seen sometimes that euler semi-implicit, when executing multiple times, can get slightly different results (maybe because finite arithmetic rounding errors). This might be the reason (as all other dense tests pass, even test 0 and 1 for euler semi implicit).\r\n"},"comment":{"url":"https://api.github.com/repos/numerical-mathematics/extrapolation/issues/comments/183888202","html_url":"https://github.com/numerical-mathematics/extrapolation/issues/8#issuecomment-183888202","issue_url":"https://api.github.com/repos/numerical-mathematics/extrapolation/issues/8","id":183888202,"user":{"login":"ketch","id":697763,"avatar_url":"https://avatars.githubusercontent.com/u/697763?v=3","gravatar_id":"","url":"https://api.github.com/users/ketch","html_url":"https://github.com/ketch","followers_url":"https://api.github.com/users/ketch/followers","following_url":"https://api.github.com/users/ketch/following{/other_user}","gists_url":"https://api.github.com/users/ketch/gists{/gist_id}","starred_url":"https://api.github.com/users/ketch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ketch/subscriptions","organizations_url":"https://api.github.com/users/ketch/orgs","repos_url":"https://api.github.com/users/ketch/repos","events_url":"https://api.github.com/users/ketch/events{/privacy}","received_events_url":"https://api.github.com/users/ketch/received_events","type":"User","site_admin":false},"created_at":"2016-02-14T13:22:27Z","updated_at":"2016-02-14T13:22:27Z","body":"On my machine some other (non-dense-output) semi-implicit regression tests also fail.\r\n\r\nIt looks like the regression tests are examining whether the errors are the same as a reference amount of error.  That seems strange to me; regression tests are supposed to simply compare the solution to a reference solution.  The \"reference\" solution is not an exact or near-exact solution, but rather a solution obtained previously with the same code.  I'm going to rewrite the regression tests to do that."}}