{"action":"closed","issue":{"url":"https://api.github.com/repos/DmitrySoshnikov/regexp-tree/issues/142","repository_url":"https://api.github.com/repos/DmitrySoshnikov/regexp-tree","labels_url":"https://api.github.com/repos/DmitrySoshnikov/regexp-tree/issues/142/labels{/name}","comments_url":"https://api.github.com/repos/DmitrySoshnikov/regexp-tree/issues/142/comments","events_url":"https://api.github.com/repos/DmitrySoshnikov/regexp-tree/issues/142/events","html_url":"https://github.com/DmitrySoshnikov/regexp-tree/issues/142","id":284475093,"number":142,"title":"Parser: group names should be unique","user":{"login":"DmitrySoshnikov","id":244010,"avatar_url":"https://avatars1.githubusercontent.com/u/244010?v=4","gravatar_id":"","url":"https://api.github.com/users/DmitrySoshnikov","html_url":"https://github.com/DmitrySoshnikov","followers_url":"https://api.github.com/users/DmitrySoshnikov/followers","following_url":"https://api.github.com/users/DmitrySoshnikov/following{/other_user}","gists_url":"https://api.github.com/users/DmitrySoshnikov/gists{/gist_id}","starred_url":"https://api.github.com/users/DmitrySoshnikov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/DmitrySoshnikov/subscriptions","organizations_url":"https://api.github.com/users/DmitrySoshnikov/orgs","repos_url":"https://api.github.com/users/DmitrySoshnikov/repos","events_url":"https://api.github.com/users/DmitrySoshnikov/events{/privacy}","received_events_url":"https://api.github.com/users/DmitrySoshnikov/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2017-12-26T00:17:55Z","updated_at":"2017-12-26T20:29:04Z","closed_at":"2017-12-26T20:29:04Z","author_association":"OWNER","body":"See: https://tc39.github.io/proposal-regexp-named-groups/#sec-patterns-static-semantics-early-errors\r\n\r\n> It is a Syntax Error if Pattern contains multiple GroupSpecifiers whose enclosed RegExpIdentifierNames have the same StringValue.\r\n\r\nCurrently parser parses normally:\r\n\r\n```\r\n/(?<foo>)(?<foo>)/\r\n```\r\n\r\nAnd should throw on duplicate name of the second group."}}
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