Description:
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Note: Mysql PDO.

PDO fails with error when calling fetchAll() w/PDO::FETCH_INTO.

Implicit call to setFetchMode(PDO::FETCH_INTO, $oObject) passes the test, however.

Reproduce code:
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$stmt = $dbh->prepare("call data_loader()");

$stmt->setFetchMode(PDO::FETCH_INTO, $this);
$stmt->fetchAll();

results in proper assignment of return vars to object props.

BUT:

$stmt = $dbh->prepare("call data_loader()");
$stmt->fetchAll(PDO::FETCH_INTO, $this);

calling with $this results in: 
     PDOStatement::fetchAll(): SQLSTATE[HY000]: General error: Extraneous additional parameters


calling without $this results in 
    PDOStatement::fetchAll(): SQLSTATE[HY000]: General error: No fetch-into object specified.

Expected result:
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Expect class properties to be properly populated.

Actual result:
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Error thrown.

Could be lack of documenatation??