{"action":"created","issue":{"url":"https://api.github.com/repos/rust-lang/rust/issues/47291","repository_url":"https://api.github.com/repos/rust-lang/rust","labels_url":"https://api.github.com/repos/rust-lang/rust/issues/47291/labels{/name}","comments_url":"https://api.github.com/repos/rust-lang/rust/issues/47291/comments","events_url":"https://api.github.com/repos/rust-lang/rust/issues/47291/events","html_url":"https://github.com/rust-lang/rust/pull/47291","id":287067738,"number":47291,"title":"Eager unreachable blocks for `!` type","user":{"login":"varkor","id":3943692,"avatar_url":"https://avatars1.githubusercontent.com/u/3943692?v=4","gravatar_id":"","url":"https://api.github.com/users/varkor","html_url":"https://github.com/varkor","followers_url":"https://api.github.com/users/varkor/followers","following_url":"https://api.github.com/users/varkor/following{/other_user}","gists_url":"https://api.github.com/users/varkor/gists{/gist_id}","starred_url":"https://api.github.com/users/varkor/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/varkor/subscriptions","organizations_url":"https://api.github.com/users/varkor/orgs","repos_url":"https://api.github.com/users/varkor/repos","events_url":"https://api.github.com/users/varkor/events{/privacy}","received_events_url":"https://api.github.com/users/varkor/received_events","type":"User","site_admin":false},"labels":[{"id":583426710,"url":"https://api.github.com/repos/rust-lang/rust/labels/S-waiting-on-review","name":"S-waiting-on-review","color":"d3dddd","default":false}],"state":"open","locked":false,"assignee":{"login":"nikomatsakis","id":155238,"avatar_url":"https://avatars0.githubusercontent.com/u/155238?v=4","gravatar_id":"","url":"https://api.github.com/users/nikomatsakis","html_url":"https://github.com/nikomatsakis","followers_url":"https://api.github.com/users/nikomatsakis/followers","following_url":"https://api.github.com/users/nikomatsakis/following{/other_user}","gists_url":"https://api.github.com/users/nikomatsakis/gists{/gist_id}","starred_url":"https://api.github.com/users/nikomatsakis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nikomatsakis/subscriptions","organizations_url":"https://api.github.com/users/nikomatsakis/orgs","repos_url":"https://api.github.com/users/nikomatsakis/repos","events_url":"https://api.github.com/users/nikomatsakis/events{/privacy}","received_events_url":"https://api.github.com/users/nikomatsakis/received_events","type":"User","site_admin":false},"assignees":[{"login":"nikomatsakis","id":155238,"avatar_url":"https://avatars0.githubusercontent.com/u/155238?v=4","gravatar_id":"","url":"https://api.github.com/users/nikomatsakis","html_url":"https://github.com/nikomatsakis","followers_url":"https://api.github.com/users/nikomatsakis/followers","following_url":"https://api.github.com/users/nikomatsakis/following{/other_user}","gists_url":"https://api.github.com/users/nikomatsakis/gists{/gist_id}","starred_url":"https://api.github.com/users/nikomatsakis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nikomatsakis/subscriptions","organizations_url":"https://api.github.com/users/nikomatsakis/orgs","repos_url":"https://api.github.com/users/nikomatsakis/repos","events_url":"https://api.github.com/users/nikomatsakis/events{/privacy}","received_events_url":"https://api.github.com/users/nikomatsakis/received_events","type":"User","site_admin":false}],"milestone":null,"comments":25,"created_at":"2018-01-09T12:11:23Z","updated_at":"2018-02-24T01:44:11Z","closed_at":null,"author_association":"CONTRIBUTOR","pull_request":{"url":"https://api.github.com/repos/rust-lang/rust/pulls/47291","html_url":"https://github.com/rust-lang/rust/pull/47291","diff_url":"https://github.com/rust-lang/rust/pull/47291.diff","patch_url":"https://github.com/rust-lang/rust/pull/47291.patch"},"body":"This change optimises the generation of MIR in the presence of `!`. Blocks are now immediately marked as unreachable if:\n- A function argument is derived from the value of type `!`.\n- A match arm binds a value whose type is derived from `!`.\n- An rvalue is created whose type is derived from `!`.\n\nThis avoids unnecessary MIR generation and also fixes #43061.\n\nr? @nikomatsakis"},"comment":{"url":"https://api.github.com/repos/rust-lang/rust/issues/comments/368186619","html_url":"https://github.com/rust-lang/rust/pull/47291#issuecomment-368186619","issue_url":"https://api.github.com/repos/rust-lang/rust/issues/47291","id":368186619,"user":{"login":"nikomatsakis","id":155238,"avatar_url":"https://avatars0.githubusercontent.com/u/155238?v=4","gravatar_id":"","url":"https://api.github.com/users/nikomatsakis","html_url":"https://github.com/nikomatsakis","followers_url":"https://api.github.com/users/nikomatsakis/followers","following_url":"https://api.github.com/users/nikomatsakis/following{/other_user}","gists_url":"https://api.github.com/users/nikomatsakis/gists{/gist_id}","starred_url":"https://api.github.com/users/nikomatsakis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nikomatsakis/subscriptions","organizations_url":"https://api.github.com/users/nikomatsakis/orgs","repos_url":"https://api.github.com/users/nikomatsakis/repos","events_url":"https://api.github.com/users/nikomatsakis/events{/privacy}","received_events_url":"https://api.github.com/users/nikomatsakis/received_events","type":"User","site_admin":false},"created_at":"2018-02-24T01:44:11Z","updated_at":"2018-02-24T01:44:11Z","author_association":"CONTRIBUTOR","body":"Not yet. I will, I swear."}}
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