Old edited articles without pageviews should not appear in the article list. However due to the changes in the parent task this is now possible, although very rare. The `sortAndFilter` function expects the json data to contain date-keys for the days with 0 views which is no longer true, see [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/GrowthExperiments/+/refs/changes/41/977141/6/includes/UserImpact/UserImpactFormatter.php#65 | source ]]. It would be nice to revise the logic to make it more robust.
More context:
>>! In T351898#9358772, @Sgs wrote:
>The changes in [[ https://gerrit.wikimedia.org/r/c/mediawiki/extensions/GrowthExperiments/+/977141 | 977141 ]] could be slightly changing the articles list output since "old edited" articles with 0 page views would added to `recentEditsWithoutPageviews`. The problem is rather semantic than breaking the functionality but it could be confusing for uses if they get to see it. Since 0-views edited articles is almost impossible scenario I don't think this is blocker.