{"action":"created","issue":{"url":"https://api.github.com/repos/plk/biblatex/issues/793","repository_url":"https://api.github.com/repos/plk/biblatex","labels_url":"https://api.github.com/repos/plk/biblatex/issues/793/labels{/name}","comments_url":"https://api.github.com/repos/plk/biblatex/issues/793/comments","events_url":"https://api.github.com/repos/plk/biblatex/issues/793/events","html_url":"https://github.com/plk/biblatex/issues/793","id":355881450,"node_id":"MDU6SXNzdWUzNTU4ODE0NTA=","number":793,"title":"Empty parentheses with missing year","user":{"login":"jspitz","id":4538783,"node_id":"MDQ6VXNlcjQ1Mzg3ODM=","avatar_url":"https://avatars2.githubusercontent.com/u/4538783?v=4","gravatar_id":"","url":"https://api.github.com/users/jspitz","html_url":"https://github.com/jspitz","followers_url":"https://api.github.com/users/jspitz/followers","following_url":"https://api.github.com/users/jspitz/following{/other_user}","gists_url":"https://api.github.com/users/jspitz/gists{/gist_id}","starred_url":"https://api.github.com/users/jspitz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jspitz/subscriptions","organizations_url":"https://api.github.com/users/jspitz/orgs","repos_url":"https://api.github.com/users/jspitz/repos","events_url":"https://api.github.com/users/jspitz/events{/privacy}","received_events_url":"https://api.github.com/users/jspitz/received_events","type":"User","site_admin":false},"labels":[{"id":2428695,"node_id":"MDU6TGFiZWwyNDI4Njk1","url":"https://api.github.com/repos/plk/biblatex/labels/bug","name":"bug","color":"fc2929","default":true}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":15,"created_at":"2018-08-31T08:09:53Z","updated_at":"2018-09-26T14:44:20Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"In the MWE below, I'd expect that the parentheses holding issue and year will not be printed if both year and issue are undefined. Instead, empty parentheses are output, as in:\r\n\r\n> Doe, Jane and John Due (n.d.). “Example title”. In: _Topnotch Studies_ 4.1 (), pp. 1–13.\r\n\r\nI think this is a regression to earlier version, but I cannot put my finger on the version where it changed.\r\n\r\n```\r\n\\documentclass{article}\r\n\\usepackage[english]{babel}\r\n\\usepackage{filecontents}\r\n\\usepackage[bibstyle=authoryear]{biblatex}\r\n\r\n\\addbibresource{\\jobname.bib}\r\n \r\n\\begin{filecontents}{\\jobname.bib}\r\n    @article{Doe.2016,\r\n \t\tauthor = {Doe, Jane and Due, John},\r\n \t\ttitle = {Example title},\r\n \t\tpages = {1--13},\r\n \t\tvolume = {4},\r\n \t\tnumber = {1},\r\n \t\tjournal = {Topnotch Studies}\r\n    }\r\n\\end{filecontents}\r\n \r\n\\begin{document}\r\n\\nocite{Doe.2016}\r\n\\printbibliography\r\n\\end{document}\r\n```"},"comment":{"url":"https://api.github.com/repos/plk/biblatex/issues/comments/424742682","html_url":"https://github.com/plk/biblatex/issues/793#issuecomment-424742682","issue_url":"https://api.github.com/repos/plk/biblatex/issues/793","id":424742682,"node_id":"MDEyOklzc3VlQ29tbWVudDQyNDc0MjY4Mg==","user":{"login":"jspitz","id":4538783,"node_id":"MDQ6VXNlcjQ1Mzg3ODM=","avatar_url":"https://avatars2.githubusercontent.com/u/4538783?v=4","gravatar_id":"","url":"https://api.github.com/users/jspitz","html_url":"https://github.com/jspitz","followers_url":"https://api.github.com/users/jspitz/followers","following_url":"https://api.github.com/users/jspitz/following{/other_user}","gists_url":"https://api.github.com/users/jspitz/gists{/gist_id}","starred_url":"https://api.github.com/users/jspitz/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jspitz/subscriptions","organizations_url":"https://api.github.com/users/jspitz/orgs","repos_url":"https://api.github.com/users/jspitz/repos","events_url":"https://api.github.com/users/jspitz/events{/privacy}","received_events_url":"https://api.github.com/users/jspitz/received_events","type":"User","site_admin":false},"created_at":"2018-09-26T14:44:20Z","updated_at":"2018-09-26T14:44:20Z","author_association":"CONTRIBUTOR","body":"Note though comment 1: This behavior is a regression to earlier versions of biblatex, and thus a bug. I just noticed by chance that some of my bibliographies suddenly have these empty parentheses. I would expect that the original behavior is restored."}}
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