{"action":"closed","issue":{"url":"https://api.github.com/repos/leanprover/lean/issues/485","labels_url":"https://api.github.com/repos/leanprover/lean/issues/485/labels{/name}","comments_url":"https://api.github.com/repos/leanprover/lean/issues/485/comments","events_url":"https://api.github.com/repos/leanprover/lean/issues/485/events","html_url":"https://github.com/leanprover/lean/issues/485","id":63115837,"number":485,"title":"segmentation fault","user":{"login":"fpvandoorn","id":7376012,"avatar_url":"https://avatars.githubusercontent.com/u/7376012?v=3","gravatar_id":"","url":"https://api.github.com/users/fpvandoorn","html_url":"https://github.com/fpvandoorn","followers_url":"https://api.github.com/users/fpvandoorn/followers","following_url":"https://api.github.com/users/fpvandoorn/following{/other_user}","gists_url":"https://api.github.com/users/fpvandoorn/gists{/gist_id}","starred_url":"https://api.github.com/users/fpvandoorn/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fpvandoorn/subscriptions","organizations_url":"https://api.github.com/users/fpvandoorn/orgs","repos_url":"https://api.github.com/users/fpvandoorn/repos","events_url":"https://api.github.com/users/fpvandoorn/events{/privacy}","received_events_url":"https://api.github.com/users/fpvandoorn/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/leanprover/lean/labels/bug","name":"bug","color":"fc2929"}],"state":"closed","locked":false,"assignee":{"login":"leodemoura","id":2778936,"avatar_url":"https://avatars.githubusercontent.com/u/2778936?v=3","gravatar_id":"","url":"https://api.github.com/users/leodemoura","html_url":"https://github.com/leodemoura","followers_url":"https://api.github.com/users/leodemoura/followers","following_url":"https://api.github.com/users/leodemoura/following{/other_user}","gists_url":"https://api.github.com/users/leodemoura/gists{/gist_id}","starred_url":"https://api.github.com/users/leodemoura/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/leodemoura/subscriptions","organizations_url":"https://api.github.com/users/leodemoura/orgs","repos_url":"https://api.github.com/users/leodemoura/repos","events_url":"https://api.github.com/users/leodemoura/events{/privacy}","received_events_url":"https://api.github.com/users/leodemoura/received_events","type":"User","site_admin":false},"milestone":null,"comments":0,"created_at":"2015-03-19T23:33:49Z","updated_at":"2015-03-24T02:03:57Z","closed_at":"2015-03-24T02:03:57Z","body":"[This branch](https://github.com/fpvandoorn/lean/tree/broken) compiles normally, but removing the exit [here](https://github.com/fpvandoorn/lean/blob/broken/hott/types/trunc.hlean#L47) gives rise to a segmentation fault. The tactic which fails is `exact (is_embedding.elim f a a')` on line 55."}}