Description:
------------
The outward symptom is the same as bug #24399: PHP5 crashes when running DB:isError. The test script is the same except it's mysql rather than pgsql, and the table has a different name.

The configure command as listed in the makefile is:

'./configure' '--with-mysql=/usr/local/mysql' '--with-mysql-sock=/var/lib/mysql/mysql.sock' '--prefix=/home/dagfinn/php5/' '--enable-debug'

However, php -i for some reason lists only the --prefix option

Reproduce code:
---------------
require_once 'DB.php';


$db = Db::connect('mysql://me:mypasswd@localhost/mydb', false);
if (Db::isError($db))
{
    die($db->getMessage());
}

$res = $db->query("SELECT * FROM Users");
if (Db::isError($res))
{
    die($res->getMessage());
}


Expected result:
----------------
No output

Actual result:
--------------
(gdb) bt
#0  instanceof_function (instance_ce=0x0, ce=0x82d9a5c)
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend_operators.c:1434
#1  0x08141308 in is_a_impl (ht=2, return_value=0x82d9a5c, this_ptr=0x0,
    return_value_used=1, only_subclass=1 '\001')
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend_builtin_functions.c:623
#2  0x081413b5 in zif_is_subclass_of (ht=2, return_value=0x82d9a5c,
    this_ptr=0x0, return_value_used=1)
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend_builtin_functions.c:640
#3  0x0814b09f in zend_do_fcall_common_helper (execute_data=0xbfffcf00,
    op_array=0x822be7c)
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend_execute.c:2606
#4  0x08147f57 in execute (op_array=0x822be7c)
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend_execute.c:1254
#5  0x0814af1e in zend_do_fcall_common_helper (execute_data=0xbfffd390,
    op_array=0x821ba14)
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend_execute.c:2635
#6  0x08147f57 in execute (op_array=0x821ba14)
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend_execute.c:1254
#7  0x0813acc3 in zend_execute_scripts (type=8, retval=0x0, file_count=3)
    at /home/dagfinn/downloads/php-5.0.0b1/Zend/zend.c:1017
#8  0x08113b67 in php_execute_script (primary_file=0xbffff720)
    at /home/dagfinn/downloads/php-5.0.0b1/main/main.c:1695
#9  0x08150afd in main (argc=2, argv=0xbffff7a4)
    at /home/dagfinn/downloads/php-5.0.0b1/sapi/cgi/cgi_main.c:1534
#10 0x42015574 in __libc_start_main () from /lib/tls/libc.so.6