Description:
------------
Sorry for strange Engrish.

SQLite3 database didn't unlock, when fatal error occurs while iterating over a PDOStatement object using foreach-loop.

Test script:
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$con = new PDO('sqlite:test.db');

$con->query('CREATE TABLE IF NOT EXISTS t (c INT)');

$con->query('INSERT INTO t VALUES (1)');

foreach ($con->query('SELECT * FROM t LIMIT 1') as $row) {
    trigger_error('abort', E_USER_ERROR); # test.db not unlocking
}

Expected result:
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Will not be able to use some SQL statements. In addition PHP will be timeout.