QJsonObject insert corrupts utf8 string

Question

I have this code where tag.m_description is a QString containing Cyrillic characters: "Шщлщ"

QJsonObject json;
QJsonObject::iterator it = 
      json.insert("value", QJsonValue( tag.m_description );

qDebug(QJsonValue( tag.m_description ).toString());
qDebug((*it).toString());

This is the first and second output from the debug statements:

Шщлщ
⠄䤄㬄䤄

The first output is good. The second is not.

Any idea why QJsonObject::insert is corrupting my data?

Answer 1

I found out, looking at QJsonObject source code, that the string is stored as a unicode string instead of utf-8. It is stored internally in a utf-16 (two byte per character) array.