[wp-trac] [WordPress Trac] #22430: wp_ob_end_flush_all bug when zlib.output_compression = On

[WordPress Trac]

#22430: wp_ob_end_flush_all bug when zlib.output_compression = On
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 Reporter:  Matthias Reuter          |       Owner:  (none)
     Type:  defect (bug)             |      Status:  reopened
 Priority:  normal                   |   Milestone:  Awaiting Review
Component:  General                  |     Version:  2.8
 Severity:  major                    |  Resolution:
 Keywords:  has-patch needs-testing  |     Focuses:
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Comment (by autotutorial):

 To understand what happens, let's take a step back to the source of this
 error {{{
 Notice: ob_end_flush() [ref.outcontrol]: failed to delete buffer zlib
 output compression in /wp-includes/functions.php on line 2683
 }}}
 ob_end_flush can return false and issue Notice when something goes wrong.
 the zlib buffer cannot be closed, rather than relying with ob_get_level a
 code can be processed with ob_list_handlers() which indicates whether
 outup_buffering (output_buffering INI ALL or ob_start with or without
 callback) is in use Only one compression buffer can exist at a time.
 With zlib.output_compression enabled, what does ob_list_handlers() return?
 please you can do a test because I can't but I would like assistance in
 the solution.

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Ticket URL: <https://core.trac.wordpress.org/ticket/22430#comment:16>
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