After upgrading from 7.12 to 7.14, I started getting an error on the comment administration page:
Notice: Undefined index: und in comment_admin_overview() (line 107 of /path/to/drupal/modules/comment/comment.admin.inc).
This issue, which has been described in the past, appears to be occurring because this function assumes the presence of a value that does not exist if the comment had no subject.
Needs work
7.0 ⚰️
The change is currently missing an automated test that fails when run with the original code, and succeeds when the bug has been fixed.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.