[wp-trac] [WordPress Trac] #48658: Page and attachment permalink can be silently overwritten when Permalinks are set to /%postname%/ (was: Generating a new post permalink silently overwrites existing attachment permalink)

[WordPress Trac]

#48658: Page and attachment permalink can be silently overwritten when Permalinks
are set to /%postname%/
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 Reporter:  raamdev       |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Permalinks    |     Version:  trunk
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by raamdev):

 It looks like this bug is worse than I thought. It doesn’t affect just
 attachments. It also affects Pages.

 1. Set Settings -> Permalinks to “Post name” (i.e., `/%postname%/`)
 1. Publish a Page with a Permalink `/hello-moon/`
 1. Publish a Post with a permalink `/hello-moon/` (which you can do!)

 The post gets published but the permalink leads you to the Page not the
 Post.

 It looks like this is because
 [[https://github.com/WordPress/WordPress/blob/3a735ec87af655d53838819939bf56efc6e9646e
 /wp-includes/post.php#L4388|/wp-includes/post.php#L4388]] assumes that
 Pages are in a separate namespace from Posts (this assumption is noted in
 an earlier comment:
 [[https://github.com/WordPress/WordPress/blob/3a735ec87af655d53838819939bf56efc6e9646e
 /wp-includes/post.php#L4360-L4363|/wp-includes/post.php#L4360-L4363]]),
 but this is not the case when the Permalinks are set to "Post name"
 (`%postname%/`).

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Ticket URL: <https://core.trac.wordpress.org/ticket/48658#comment:1>
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