[wp-trac] [WordPress Trac] #39338: class-wp-hook.php - apply_filters() infinite loop

[WordPress Trac]

#39338: class-wp-hook.php - apply_filters() infinite loop
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 Reporter:  frettled      |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Plugins       |     Version:  4.7
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by dhanendran):

 Hi @frettled

 `$this->iterations[ $nesting_level ]` can't be `null`.
 {{{
 $this->iterations[ $nesting_level ] = array_keys( $this->callbacks );
 }}}

 `array_keys()` will return empty array, if it don't have any values in
 `$this->callbacks`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39338#comment:1>
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