{"action":"created","issue":{"url":"https://api.github.com/repos/sympy/sympy/issues/8972","labels_url":"https://api.github.com/repos/sympy/sympy/issues/8972/labels{/name}","comments_url":"https://api.github.com/repos/sympy/sympy/issues/8972/comments","events_url":"https://api.github.com/repos/sympy/sympy/issues/8972/events","html_url":"https://github.com/sympy/sympy/issues/8972","id":56972401,"number":8972,"title":"PyPy travis failures","user":{"login":"jcrist","id":2783717,"avatar_url":"https://avatars.githubusercontent.com/u/2783717?v=3","gravatar_id":"","url":"https://api.github.com/users/jcrist","html_url":"https://github.com/jcrist","followers_url":"https://api.github.com/users/jcrist/followers","following_url":"https://api.github.com/users/jcrist/following{/other_user}","gists_url":"https://api.github.com/users/jcrist/gists{/gist_id}","starred_url":"https://api.github.com/users/jcrist/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jcrist/subscriptions","organizations_url":"https://api.github.com/users/jcrist/orgs","repos_url":"https://api.github.com/users/jcrist/repos","events_url":"https://api.github.com/users/jcrist/events{/privacy}","received_events_url":"https://api.github.com/users/jcrist/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":24,"created_at":"2015-02-08T22:59:40Z","updated_at":"2015-03-03T08:34:11Z","closed_at":null,"body":"The tests in PyPy are failing for a couple tests. Mostly in combinatorics/permutations stuff. I'm 99% certain that this has to do with the [ordered dicts by default](http://morepypy.blogspot.com/2015/01/faster-more-memory-efficient-and-more.html) change in PyPy. This means that dicts that are key-value consistent are not *equlivalent* due to ordering.\r\n\r\nExample: https://travis-ci.org/sympy/sympy/jobs/49694978"},"comment":{"url":"https://api.github.com/repos/sympy/sympy/issues/comments/76905884","html_url":"https://github.com/sympy/sympy/issues/8972#issuecomment-76905884","issue_url":"https://api.github.com/repos/sympy/sympy/issues/8972","id":76905884,"user":{"login":"toolforger","id":915906,"avatar_url":"https://avatars.githubusercontent.com/u/915906?v=3","gravatar_id":"","url":"https://api.github.com/users/toolforger","html_url":"https://github.com/toolforger","followers_url":"https://api.github.com/users/toolforger/followers","following_url":"https://api.github.com/users/toolforger/following{/other_user}","gists_url":"https://api.github.com/users/toolforger/gists{/gist_id}","starred_url":"https://api.github.com/users/toolforger/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/toolforger/subscriptions","organizations_url":"https://api.github.com/users/toolforger/orgs","repos_url":"https://api.github.com/users/toolforger/repos","events_url":"https://api.github.com/users/toolforger/events{/privacy}","received_events_url":"https://api.github.com/users/toolforger/received_events","type":"User","site_admin":false},"created_at":"2015-03-03T08:34:11Z","updated_at":"2015-03-03T08:34:11Z","body":"I'm seeing so much. I have done some debugging and am seeing a sign in an expression that's + in CPython and - in PyPy. It's slow going though, I'm having trouble distinguishing relevant from irrelevant differences because I don't know what the ODE code is supposed to do."}}