[wp-trac] [WordPress Trac] #21504: Not checking if apply_filters exists before calling it

[WordPress Trac]

#21504: Not checking if apply_filters exists before calling it
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 Reporter:  jdkoelsch                       |       Owner:
     Type:  defect (bug)                    |      Status:  new
 Priority:  normal                          |   Milestone:  3.5
Component:  Database                        |     Version:  3.4.1
 Severity:  normal                          |  Resolution:
 Keywords:  dev-feedback reporter-feedback  |
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Comment (by nacin):

 apply_filters() isn't the only dependency in wp-db.php that would need to
 be checked. WP_Error, wp_debug_backtrace_summary(),
 wp_load_translations_early(), `__`, WP_DEBUG, wp_die, and then some.

 There's a class_exists() check on WP_Error but that's about it.

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Ticket URL: <http://core.trac.wordpress.org/ticket/21504#comment:7>
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