[mpeshev]

When a comment belongs to a post whose post type is no longer registered (for example after deactivating the plugin that registered it), the Comments screen printed an edit link with an empty URL, read the view_item label of a null post type object (two PHP warnings per row and an empty link), and linked the comment date to a permalink that cannot work.

In the direction of 36058.diff on the ticket, this shows the post title and the comment date as plain text in that case. The date column now checks that the post type exists, so it also stops linking comments whose post no longer exists (comment:5).

Trac ticket: https://core.trac.wordpress.org/ticket/36058

Testing

• Two new tests in tests/phpunit/tests/admin/wpCommentsListTable.php fail on trunk (Attempt to read property "labels" on null, and a linked date) and pass with the patch.
• vendor/bin/phpunit --group comment passes (756 tests).

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 5.5
Used for: reproducing the issue, drafting the fix and tests, and running them. I reviewed every line.

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

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