[wp-trac] [WordPress Trac] #9968: dynamically adding/removing filters breaks plugins

[WordPress Trac]

#9968: dynamically adding/removing filters breaks plugins
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 Reporter:  Denis-de-Bernardy        |       Owner:
     Type:  defect (bug)             |      Status:  reopened
 Priority:  low                      |   Milestone:  Future Release
Component:  Plugins                  |     Version:
 Severity:  normal                   |  Resolution:
 Keywords:  has-patch needs-testing  |
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Comment (by solarissmoke):

 Akismet is probably the most widely used plugin that does this (calls
 `remove_action` on a currently active filter) and it breaks a lot of other
 plugins that use that filter ( [http://wordpress.org/support/topic
 /akismet-breaks-the-pre_comment_approved-filter-for-other-plugins Bug
 report] and [http://plugins.trac.wordpress.org/ticket/1625 trac ticket]).

 If this is difficult to fix outright, perhaps we could raise a debug error
 when `remove_action` is called on an active filter? At least that way
 plugin developers would get a warning when they're doing it wrong.

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Ticket URL: <http://core.trac.wordpress.org/ticket/9968#comment:9>
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