[wp-trac] [WordPress Trac] #6672: define('SAVEQUERIES', true) = debug_backtrace() = Error 500

[WordPress Trac]

#6672: define('SAVEQUERIES', true) = debug_backtrace() = Error 500
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 Reporter:  ozh      |       Owner:  anonymous                   
     Type:  defect   |      Status:  new                         
 Priority:  lowest   |   Milestone:  2.5.1                       
Component:  General  |     Version:  2.5                         
 Severity:  minor    |    Keywords:  SAVEQUERIES, debug_backtrace
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 This won't stop the earth rotation, but I've come across an annoying bug
 that I'm having difficulties to identify precisely.

 '''Fact:'''
 `define('SAVEQUERIES', true);` in my wp-config.php makes everything break
 with an Error 500.

 '''Symptoms:'''
 Error 500, log says "Premature end of script headers: /dh/cgi-
 system/php5.cgi" which means basically anything.

 '''Culprit:'''
 Function get_caller() in wp-db.php is the one causing the error. In that
 function, this particular line is to blame: $bt = debug_backtrace();
 No clue why debug_backtrace() break things, though, and @debug_backtrace()
 doesnt help.

 '''Server specs:'''
 PHP 5.2.3, Apache running CGI/FastCGI, [http://planetozh.com/phpinfo.php
 whole phpinfo()]

 This ticket is mostly for the record if anyone happens to search here for
 the same problem, even if it's going to get a
 wontfix/worksforme/cantreproduce. Cheers :)

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Ticket URL: <http://trac.wordpress.org/ticket/6672>
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