[wp-trac] [WordPress Trac] #29139: is_a() deprecation/un-deprecation

[WordPress Trac]

#29139: is_a() deprecation/un-deprecation
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 Reporter:  area@…        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  General       |     Version:  3.9.1
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by markoheijnen):

 I think this is a duplicate of #25672 which has a patch that should solve
 all the errors.

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Ticket URL: <https://core.trac.wordpress.org/ticket/29139#comment:2>
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