Executing QSqlQuery:: exec(), next() after QSqlQuery:: prepare() cause error "QMYSQL3: Unable to fetch data" if return type is TINYINT(3) UNSIGNED

I'm using MySQL plugin and it works fine on Qt5.5.1
With upgrading to Qt5.6.0 and Qt5.7.0b I have found problem in QSqlQuery::prepare.
Usage of exec() works fine without QSqlQuery::prepare only.
Once I try to set values using addBindValue, calling next() cause error:
"QMYSQL3: Unable to fetch data"
Please fix it and tell how to temporary patch this bug.