QSqlError::text() never returns a string

Whenever I get a QSqlQuery error the QSqlError text() function returns an empty string and the error code is always 0; eg,

Code snippet example QSql error:
...
QSqlQuery query(*db_conn);
query.prepare("INSERT INTO misc_data SET internat=:internet;"); //typo
query.bindValue(":internet",internet->status());
if(!query.exec())

{ fprintf(stderr ,"MySQL: (%p) error '%s', code %d\n",&query,query.lastError().text().toLatin1().data(),query.lastError().type()); return -1; }

return 0;
...

Prints:

MySQL (0x7ffe805e5348) error '', code 0

I have found that at Line 208 in file:

qtbase/src/plugins/sqldrivers/mysql/qsql_mysql.cpp

static QSqlError qMakeError(const QString& err, QSqlError::ErrorType type,
const QMYSQLDriverPrivate* p) ...

Appears to provide the information but does not seem to be called.

What am I doing wrong any suggestion will be great.

Thanks