{"action":"opened","issue":{"url":"https://api.github.com/repos/servo/servo/issues/12670","repository_url":"https://api.github.com/repos/servo/servo","labels_url":"https://api.github.com/repos/servo/servo/issues/12670/labels{/name}","comments_url":"https://api.github.com/repos/servo/servo/issues/12670/comments","events_url":"https://api.github.com/repos/servo/servo/issues/12670/events","html_url":"https://github.com/servo/servo/issues/12670","id":168524400,"number":12670,"title":"Make mach warn when running tests against an old build","user":{"login":"nox","id":123095,"avatar_url":"https://avatars.githubusercontent.com/u/123095?v=3","gravatar_id":"","url":"https://api.github.com/users/nox","html_url":"https://github.com/nox","followers_url":"https://api.github.com/users/nox/followers","following_url":"https://api.github.com/users/nox/following{/other_user}","gists_url":"https://api.github.com/users/nox/gists{/gist_id}","starred_url":"https://api.github.com/users/nox/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nox/subscriptions","organizations_url":"https://api.github.com/users/nox/orgs","repos_url":"https://api.github.com/users/nox/repos","events_url":"https://api.github.com/users/nox/events{/privacy}","received_events_url":"https://api.github.com/users/nox/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/servo/servo/labels/A-mach","name":"A-mach","color":"d7e102"},{"url":"https://api.github.com/repos/servo/servo/labels/I-papercut","name":"I-papercut","color":"e10c02"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-07-31T15:56:20Z","updated_at":"2016-07-31T15:56:20Z","closed_at":null,"body":"In https://github.com/servo/servo/pull/12186#issuecomment-235915528, @GuillaumeGomez ran `./mach test-wpt` (which uses the debug build) after compiling his tree with `./mach build -r` (which compiles the release build). `mach` could have avoided that papercut by printing a warning about his quite old `debug` build."}}
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