Description:
------------
When doing an SQL query (which had errors), I get segfault 
with apache 2.0.55 prefork, mysql 5.0.5 from debian testing 
(ldd shows it's linked with correct library) using legacy code 
(old version of drupal). While legacy code does not have to 
work, segfault when running it is not expected

Reproduce code:
---------------
INSERT INTO watchdog (uid, type, message, location, hostname, timestamp) VALUES (\'\', \'error\', \'warning: array_merge() [<a href=\\\'function.array-merge\\\'>function.array-merge</a>]: Argument #1 is not an array in /home/juraj/www/includes/common.inc on line 710.\', \'?\', \'82.100.100.200\', \'1129942132\')

causes php child to segfault

Expected result:
----------------
i did not expect it to actually execute, but the segfault is 
wrong behaviour.


Actual result:
--------------
This is a part of strace, which shows the problem. 28 is 
mysql socket.

Another queries work well.

[pid  3442] time(NULL)                  = 1129942132
[pid  3442] fcntl64(28, F_SETFL, O_RDWR|O_NONBLOCK) = 0
[pid  3442] read(28, 0x83b47c8, 8192)   = -1 EAGAIN 
(Resource temporarily unavailable)
[pid  3442] fcntl64(28, F_SETFL, O_RDWR) = 0
[pid  3442] write(28, ":\1\0\0\3INSERT INTO watchdog (uid, 
type, message, location, hostname, timestamp) VALUES (\'\', 
\'error\', \'warning: array_merge() [<a href=\\
\'function.array-merge\\\'>function.array-merge</a>]: 
Argument #1 is not an array in /home/juraj/www/includes/
common.inc on line 710.\', \'?\', \'82.100.100.200\', 
\'1129942132\')", 318) = 318
[pid  3442] read(28, "\7\0\0\1\0\1\33\2\0\1\0", 16384) = 11
[pid  3442] --- SIGSEGV (Segmentation fault) @ 0 (0) ---
[pid  3442] chdir("/usr/local/apache2") = 0
[pid  3442] rt_sigaction(SIGSEGV, {SIG_DFL}, {SIG_DFL}, 8) = 
0
[pid  3442] getpid()                    = 3442
[pid  3442] getpid()                    = 3442
[pid  3442] kill(3442, SIGSEGV)         = 0
[pid  3442] sigreturn()                 = ? (mask now 
[RTMIN])
[pid  3442] --- SIGSEGV (Segmentation fault) @ 0 (0) ---