Description:
------------
A simple PEAR DB test script causes a segfault. 

My configure line:
./configure' '--prefix=/home/mattm/local/php5-apache' '--with-apache=../apache_1.3.27' '--with-pgsql=/usr' '--with-gd=/home/mattm/local/php5-apache' '--with-freetype-dir=/home/mattm/local/php5-apache' '--with-jpeg-dir=/usr' '--enable-calendar' '--with-libxml-dir=/home/mattm/local/php5-apache' '--without-simplexml' '--enable-debug'



Reproduce code:
---------------
<?php
error_reporting(E_ALL);
require_once 'DB.php';

$db = Db::connect('pgsql://postgres:@127.0.0.1/mattm', false);
if (Db::isError($db))
{
    die($db->getMessage());
}

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

?>


Expected result:
----------------
no output, but shouldn't segfault

Actual result:
--------------
(gdb) bt
#0  0x80b64c8 in instanceof_function ()
#1  0x80c3399 in zend_startup_builtin_functions ()
#2  0x80c3404 in zend_startup_builtin_functions ()
#3  0x80d006f in zend_do_fcall_common_helper ()
#4  0x80d06a6 in zend_do_fcall_handler ()
#5  0x80cbb9b in execute ()
#6  0x80d01dd in zend_do_fcall_common_helper ()
#7  0x80d05aa in zend_do_fcall_by_name_handler ()
#8  0x80cbb9b in execute ()
#9  0x80b9979 in zend_execute_scripts ()
#10 0x8087fd3 in php_execute_script ()
#11 0x80d625a in apache_php_module_main ()
#12 0x807e1d6 in ap_get_server_built ()
#13 0x807e232 in ap_get_server_built ()
#14 0x81efa69 in ap_invoke_handler ()
#15 0x820560f in ap_some_auth_required ()
#16 0x8205676 in ap_process_request ()
#17 0x81fbf16 in ap_child_terminate ()
#18 0x81fc0d1 in ap_child_terminate ()
#19 0x81fc24c in ap_child_terminate ()
#20 0x81fc8dd in ap_child_terminate ()
#21 0x81fd14c in main ()
#22 0x4033165f in __libc_start_main () from /lib/libc.so.6