Tinyint(1) of MySQL database is reported as char instead of bool

In my application I have a MySql database table that models a boolean as a tinyint(1).

If I use QSqlQuery::exec(mySqlStatement) then QSqlQuery::record() returns a record where QSqlRecord::value(index) returns a QVariant(bool) for such tiniyint(1) columns.

But if I use QSqlQuery::exec() on a prepared statement (QSqlQuery::prepare(mySqlStatement)) then QSqlRecord::value(index) returns a QVariant(char) instead.

This bug is new to Qt 5.6. I tested it with QT 5.4.2 and Qt 5.5.1 (without changing anything but the Qt version).