Description:
------------
Calling a stored procedure with rowset result yields the connection corrupted as shown in example. Content of second query seems unimportant, I always get the same error.
After first call to sp and consumption of rowset as shown, next_result() method still yields true. store_result method returns no valid resultset, though.
When store_result is called after first sp call and result use, the next call actually succeeds, so this might be used as a workaraound.

Test script:
---------------
<?php
	$con = new mysqli('127.0.0.1', 'root', 'Y@pack', 'uschi');
	if ($con->connect_errno) { die('Failed to connect to database'); }
	
	$con->query('DROP PROCEDURE IF EXISTS sp_test');
	if ($con->errno) { die($con->error); }
	$con->query('CREATE PROCEDURE sp_test() BEGIN SELECT 1 AS a, 2 AS b, 3 AS c; END');
	if ($con->errno) { die($con->error); }

	if ( ! ($res = $con->query('call sp_test()'))) { die($con->error); }
	while ($row = $res->fetch_assoc()) {
		echo $row['a'], ', ', $row['b'], ', ', $row['c'];
	}
	$res->free_result();

	echo '|';

	if ( ! ($res = $con->query('SELECT 1 AS a, 2 AS b, 3 AS c;'))) { die($con->error); }
	while ($row = $res->fetch_assoc()) {
		echo $row['a'], ', ', $row['b'], ', ', $row['c'];
	}
	$res->free_result();
?>




--yields--> 1, 2, 3Commands out of sync; you can't run this command now



<?php
	$con = new mysqli('127.0.0.1', 'root', 'Y@pack', 'uschi');
	if ($con->connect_errno) { die('Failed to connect to database'); }
	
	$con->query('DROP PROCEDURE IF EXISTS sp_test');
	if ($con->errno) { die($con->error); }
	$con->query('CREATE PROCEDURE sp_test() BEGIN SELECT 1 AS a, 2 AS b, 3 AS c; END');
	if ($con->errno) { die($con->error); }

	if ( ! ($res = $con->query('call sp_test()'))) { die($con->error); }
	while ($row = $res->fetch_assoc()) {
		echo $row['a'], ', ', $row['b'], ', ', $row['c'];
	}
	$res->free_result();
	// bug workaraound for stored procedures delivering a row set
	if ($con->next_result()) { $res = $con->store_result(); }

	echo '|';

	if ( ! ($res = $con->query('SELECT 1 AS a, 2 AS b, 3 AS c;'))) { die($con->error); }
	while ($row = $res->fetch_assoc()) {
		echo $row['a'], ', ', $row['b'], ', ', $row['c'];
	}
	$res->free_result();
	// bug workaraound for stored procedures delivering a row set
	if ($con->next_result()) { $res = $con->store_result(); }
?>



--yields--> 1, 2, 3|1, 2, 3

Expected result:
----------------
1, 2, 3

Actual result:
--------------
1, 2, 3Commands out of sync; you can't run this command now