Does anyone have any ideas why Valgrind would report "Conditional jump or move depends on uninitialised value(s)" for just the following:

@
QSqlDatabase db = QSqlDatabase::addDatabase("QPSQL");
db.setHostName("hostname");
db.setDatabaseName("database_name");
db.setUserName("username");
db.setPassword("password");
bool ok = db.open();
@

I'm using Qt5.3.0 on Linux Mint 17 x64. The above would produce the error for the line with db.open().

Thanks.