The docblock for \Drupal\Core\Cache\CacheTagsChecksumTrait::invalidateTags says it implements \Drupal\Core\Cache\CacheTagsChecksumInterface::invalidateTags() but that doesn't exist. In reality it implements \Drupal\Core\Cache\CacheTagsInvalidatorInterface::invalidateTags as per usage in \Drupal\Core\Cache\DatabaseCacheTagsChecksum.
N/A
Fix the docblock
Fixed
9.5
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Agreed with the quickfix, we can always change the whole class to use inheritdoc later on.
Committed/pushed to 10.1.x and cherry-picked back through to 9.5.x, thanks!
Automatically closed - issue fixed for 2 weeks with no activity.