[wp-trac] [WordPress Trac] #17817: do_action/apply_filters/etc. recursion on same filter kills underlying call

[WordPress Trac]

#17817: do_action/apply_filters/etc. recursion on same filter kills underlying call
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 Reporter:  kernfel                              |       Owner:  pento
     Type:  defect (bug)                         |      Status:  reopened
 Priority:  normal                               |   Milestone:  4.7
Component:  Plugins                              |     Version:  2.2
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-testing has-unit-    |     Focuses:
  tests                                          |
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Comment (by pento):

 Replying to [comment:233 dd32]:
 > Once @jorbin's [attachment:17817.26.diff] is in, can't
 [attachment:17817.25.diff] just be a check on `function_exists(
 'add_filter' )` and use the API when available, falling back to directly
 modifying when it's called before initialisation?

 It doesn't need to wait for [attachment:17817.26.diff]. In the test suite,
 `phpunit/includes/functions.php` is loaded, it plays some funky music,
 then `wp-settings.php` is loaded - `WP_Hook` will be loaded the same
 before or after whatever the fix for #37707 is.

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Ticket URL: <https://core.trac.wordpress.org/ticket/17817#comment:235>
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