Description:
------------
The Apache child process are segfaulting when using mysql_fetch_field.
I'm using Apache 2.2+Php5.1x snap 07-01-06+Mysql 5.0.18
I also tried with Apache 2.0x, php5.1.1 and mysql 4.1.15, i have the same problem since about one month, maybe a bit more.

Reproduce code:
---------------
Looking to a table in phpmyadmin (sql.php which use mysql.dbi.lib.php to invoke the mysql_fetch_field), I tried 2 or 3 versions of phpmyadmin without success.

Expected result:
----------------
See the page insteam of a blank one

Actual result:
--------------
(gdb) bt
#0  0xb7dcfc9b in strlen () from /lib/tls/libc.so.6
#1  0xb7bd0f0f in add_property_string_ex (arg=0x84866a4, key=0xb7c8389e "def",
    key_len=4, str=0x2 <Address 0x2 out of bounds>, duplicate=1)
    at /root/sources/php-5.1.1/Zend/zend_API.c:1264
#2  0xb7a95d04 in zif_mysql_fetch_field (ht=2, return_value=0x84866a4,
    return_value_ptr=0x0, this_ptr=0x0, return_value_used=1)
    at /root/sources/php-5.1.1/ext/mysql/php_mysql.c:2266
#3  0xb7bf2767 in zend_do_fcall_common_helper_SPEC (execute_data=0xbff874c0)
    at zend_vm_execute.h:188
#4  0xb7bf1f19 in execute (op_array=0x8330a18) at zend_vm_execute.h:88
#5  0xb7bf212d in zend_do_fcall_common_helper_SPEC (execute_data=0xbff8c3b0)
    at zend_vm_execute.h:222
#6  0xb7bf1f19 in execute (op_array=0x8279234) at zend_vm_execute.h:88
#7  0xb7bcfbdc in zend_execute_scripts (type=8, retval=Variable "retval" is not available.
)
    at /root/sources/php-5.1.1/Zend/zend.c:1090
#8  0xb7b98c2b in php_execute_script (primary_file=0xbff8e6e4)
    at /root/sources/php-5.1.1/main/main.c:1704
#9  0xb7c5ae9a in php_handler (r=0x826bc10)
    at /root/sources/php-5.1.1/sapi/apache2handler/sapi_apache2.c:584
#10 0x080730a6 in ap_run_handler (r=0x826bc10) at config.c:157
#11 0x080734a2 in ap_invoke_handler (r=0x826bc10) at config.c:371
#12 0x08089e9d in ap_process_request (r=0x826bc10) at http_request.c:258
#13 0x08087789 in ap_process_http_connection (c=0x825ab20) at http_core.c:171
---Type <return> to continue, or q <return> to quit---
#14 0x080791c6 in ap_run_process_connection (c=0x825ab20) at connection.c:43
#15 0x080a3201 in child_main (child_num_arg=Variable "child_num_arg" is not avai lable.
) at prefork.c:640
#16 0x080a3442 in make_child (s=Variable "s" is not available.
) at prefork.c:736
#17 0x080a34ea in startup_children (number_to_start=5) at prefork.c:754
#18 0x080a3d38 in ap_mpm_run (_pconf=0x80f00a8, plog=0x812e1a0, s=0x80f52c0)
    at prefork.c:975
#19 0x080615ef in main (argc=1, argv=0xbff8eb24) at main.c:712
(gdb) frame 4
#4  0xb7bf1f19 in execute (op_array=0x8330a18) at zend_vm_execute.h:88
88                      if (EX(opline)->handler(&execute_data TSRMLS_CC) > 0) {
(gdb) print (char *)(executor_globals.function_state_ptr->function)->common.func tion_name
$1 = 0xb7c73d2f "mysql_fetch_field"
(gdb) print (char *)executor_globals.active_op_array->function_name
$2 = 0x833c41c "PMA_DBI_get_fields_meta"
(gdb) print (char *)executor_globals.active_op_array->filename
$3 = 0x833a5ac "/home/web/phpMyAdmin-2.6.4-pl4/libraries/dbi/mysql.dbi.lib.php"