Reproducing script:

     <?php
     mysql_connect('wopr', 'root', '...');
     mysql_select_db('test');
     $result = mysql_query('SELECT * FROM test');
     mysql_fetch_field($result);
     ?>

   Stacktrace:

php4ts_debug.dll!_object_and_properties_init(_zval_struct *
arg=0x00b40420, _zend_class_entry * class_type=0x00b274f0, _hashtable *
properties=0x00000000, char * __zend_filename=0x102e40c0, unsigned int
__zend_lineno=2118, void * * * tsrm_ls=0x00b22980)  Line 603 + 0x13	C
php4ts_debug.dll!_object_init_ex(_zval_struct * arg=0x00b40420,
_zend_class_entry * class_type=0x00b274f0, char *
__zend_filename=0x102e40c0, unsigned int __zend_lineno=2118, void * * *
tsrm_ls=0x00b22980)  Line 610 + 0x1b	C
php4ts_debug.dll!_object_init(_zval_struct * arg=0x00b40420, char *
__zend_filename=0x102e40c0, unsigned int __zend_lineno=2118, void * * *
tsrm_ls=0x00b22980)  Line 615 + 0x1b	C
php4ts_debug.dll!zif_mysql_fetch_field(int ht=1, _zval_struct *
return_value=0x00b40420, _zval_struct * this_ptr=0x00000000, int
return_value_used=0, void * * * tsrm_ls=0x00b22980)  Line 2118 + 0x1d	C
php4ts_debug.dll!zend_do_fcall_common_helper(_zend_execute_data *
execute_data=0x0012fafc, _zend_op_array * op_array=0x00b40388, void * * *
tsrm_ls=0x00b22980)  Line 2561 + 0x36	C
php4ts_debug.dll!zend_do_fcall_handler(_zend_execute_data *
execute_data=0x0012fafc, _zend_op_array * op_array=0x00b40388, void * * *
tsrm_ls=0x00b22980)  Line 2687 + 0x11	C
php4ts_debug.dll!execute(_zend_op_array * op_array=0x00b40388, void * * *
tsrm_ls=0x00b22980)  Line 1213 + 0x13	C
php4ts_debug.dll!zend_execute_scripts(int type=8, void * * *
tsrm_ls=0x00b22980, _zval_struct * * retval=0x00000000, int file_count=3,
....)  Line 958 + 0x21	C
php4ts_debug.dll!php_execute_script(_zend_file_handle *
primary_file=0x0012ff48, void * * * tsrm_ls=0x00b22980)  Line 1691 + 0x1b	C
php.exe!main(int argc=1, char * * argv=0x00b22580)  Line 1431 + 0x11	C
php.exe!mainCRTStartup()  Line 338 + 0x11	C
kernel32.dll!77e8ca90()