[wp-trac] [WordPress Trac] #55426: Two Categories in one URL; Shows Posts that are in BOTH Categories doesn’t work

[WordPress Trac]

#55426: Two Categories in one URL; Shows Posts that are in BOTH Categories doesn’t
work
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 Reporter:  gooloode      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  General       |     Version:  5.9.2
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by bcworkz):

 Confirmed. SQL contains a `0=1` clause when category name contains a '+'.

 I thought a workaround would be to use "pre_get_posts" action to intercept
 "category_name" query vars containing a '+' and compose a "tax_query" arg
 instead using `'operator => 'AND',`. Same result, the SQL ends up with a
 `0=1` clause.

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Ticket URL: <https://core.trac.wordpress.org/ticket/55426#comment:1>
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