[Interest] Unable to determine callable overload.

[Jason H]

Whenever I give a default parameter value in C++ (where the bool=true below) I get this error:
Error: Unable to determine callable overload.  Candidates are:
    hashFile(QCryptographicHash::Algorithm,QString)
    hashFile(QCryptographicHash::Algorithm,QString,bool)

Removing the default value resolves it. Is there a way I can avoid this error and provide a default?