Boone Gorges 0ddbc2c99f Improve category check in redirect_canonical() when permastruct contains category slug. ...

[37262] changed a check in `redirect_canonical()` so that it checked
categories in the object cache rather than querying the database. However,
the check was based on the identity of `WP_Term` objects, which in
certain cases can be augmented by the main WP query routine, causing
failures of the `in_array()` check. This caused unnecessary redirects
for URLs where `is_single()` is true, but the URL is different from the
post permalink, such as the `embed` endpoint.

`has_term()` also checks the cache, but does not sufer from this bug.

Props cmillerdev.
Fixes #36602.
Built from https://develop.svn.wordpress.org/trunk@38216


git-svn-id: http://core.svn.wordpress.org/trunk@38157 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2016-08-08 18:49:28 +00:00

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