From:             markgdesign at gmail dot com
Operating system: Windows Vista Home
PHP version:      5.2.11
PHP Bug Type:     Reproducible crash
Bug description:  sprintf('%s',join('',array(false))); crashes

Description:
------------
An array with a false or null element, joined, then used in sprintf 
apparently causes PHP to crash. Actually, Apache cycles endlessly making 
the OS think it has crashed.

This is the simplest expression I can create which causes the problem:
sprintf('%s',join('',array(false)));

Forcing the result of join into type string avoids the problem:
sprintf('%s',(string) join('',array(false)));

Reproduce code:
---------------
sprintf('%s',join('',array(false)));

Expected result:
----------------
I expected it to join all array elements (interpreting false and null 
values as empty strings) and pass it to sprintf.

Actual result:
--------------
Apache cycled without responding to the page request. The Windows OS 
interpreted this as a crash, although Apache did not actually stop 
working or need to be restarted.

-- 
Edit bug report at http://bugs.php.net/?id=49597&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=49597&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=49597&r=trysnapshot53
Try a snapshot (PHP 6.0):            
http://bugs.php.net/fix.php?id=49597&r=trysnapshot60
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=49597&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=49597&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=49597&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=49597&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=49597&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=49597&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=49597&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=49597&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=49597&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=49597&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=49597&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=49597&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=49597&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=49597&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=49597&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=49597&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=49597&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=49597&r=mysqlcfg

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