[wp-trac] [WordPress Trac] #21321: Remove is_null() checks in apply_filters(), do_action(), et al.

[WordPress Trac]

#21321: Remove is_null() checks in apply_filters(), do_action(), et al.
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 Reporter:  nacin        |       Owner:  nacin
     Type:  enhancement  |      Status:  reopened
 Priority:  normal       |   Milestone:  3.5
Component:  Performance  |     Version:
 Severity:  normal       |  Resolution:
 Keywords:               |
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Changes (by nacin):

 * status:  closed => reopened
 * resolution:  fixed =>


Comment:

 Some side effects here, due to our janky current() loop and self-removal
 of actions. see [UT935]

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Ticket URL: <http://core.trac.wordpress.org/ticket/21321#comment:13>
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