{"action":"created","issue":{"url":"https://api.github.com/repos/apple/swift/issues/14611","repository_url":"https://api.github.com/repos/apple/swift","labels_url":"https://api.github.com/repos/apple/swift/issues/14611/labels{/name}","comments_url":"https://api.github.com/repos/apple/swift/issues/14611/comments","events_url":"https://api.github.com/repos/apple/swift/issues/14611/events","html_url":"https://github.com/apple/swift/pull/14611","id":296906157,"number":14611,"title":"[4.1] [GSB] Make conformance access paths robust against non-canonical signatures","user":{"login":"DougGregor","id":989428,"avatar_url":"https://avatars3.githubusercontent.com/u/989428?v=4","gravatar_id":"","url":"https://api.github.com/users/DougGregor","html_url":"https://github.com/DougGregor","followers_url":"https://api.github.com/users/DougGregor/followers","following_url":"https://api.github.com/users/DougGregor/following{/other_user}","gists_url":"https://api.github.com/users/DougGregor/gists{/gist_id}","starred_url":"https://api.github.com/users/DougGregor/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DougGregor/subscriptions","organizations_url":"https://api.github.com/users/DougGregor/orgs","repos_url":"https://api.github.com/users/DougGregor/repos","events_url":"https://api.github.com/users/DougGregor/events{/privacy}","received_events_url":"https://api.github.com/users/DougGregor/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":5,"created_at":"2018-02-13T22:18:10Z","updated_at":"2018-02-13T23:46:18Z","closed_at":null,"author_association":"MEMBER","pull_request":{"url":"https://api.github.com/repos/apple/swift/pulls/14611","html_url":"https://github.com/apple/swift/pull/14611","diff_url":"https://github.com/apple/swift/pull/14611.diff","patch_url":"https://github.com/apple/swift/pull/14611.patch"},"body":"**Explanation:** With specific type-checking interleavings in large projects, the generic\r\nsignature builder for the generic signature of a protocol might not have\r\nbeen built from the requirement signature of the protocol, which would\r\nlead to malformed conformance access paths. Make this code path more\r\nrobust by building a new generic signature builder when this happens.\r\n**Scope:** Affects projects that make heavy use of generics, across multiple files, and which also have a number of unaddressed \"redundant constraint\" warnings.\r\n**Risk:** Very low; we're only changing behavior along a path in the type checker that would otherwise fail.\r\n**Testing:** Regression tests, building the affected project to ensure it no longer crashes\r\n**Reviewer:** @huonw \r\n**SR / Radar:** rdar://problem/37335173\r\n"},"comment":{"url":"https://api.github.com/repos/apple/swift/issues/comments/365444855","html_url":"https://github.com/apple/swift/pull/14611#issuecomment-365444855","issue_url":"https://api.github.com/repos/apple/swift/issues/14611","id":365444855,"user":{"login":"DougGregor","id":989428,"avatar_url":"https://avatars3.githubusercontent.com/u/989428?v=4","gravatar_id":"","url":"https://api.github.com/users/DougGregor","html_url":"https://github.com/DougGregor","followers_url":"https://api.github.com/users/DougGregor/followers","following_url":"https://api.github.com/users/DougGregor/following{/other_user}","gists_url":"https://api.github.com/users/DougGregor/gists{/gist_id}","starred_url":"https://api.github.com/users/DougGregor/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DougGregor/subscriptions","organizations_url":"https://api.github.com/users/DougGregor/orgs","repos_url":"https://api.github.com/users/DougGregor/repos","events_url":"https://api.github.com/users/DougGregor/events{/privacy}","received_events_url":"https://api.github.com/users/DougGregor/received_events","type":"User","site_admin":false},"created_at":"2018-02-13T23:46:17Z","updated_at":"2018-02-13T23:46:17Z","author_association":"MEMBER","body":"swift-ci please test Linux"}}
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