As reported in bug 404474, GCC gives a warning about using an uninitialized value in KIO.

The relevant portion of code is:

FileOperationType opType;
switch (command) {
case CMD_DEL:
    opType = Delete;
    break;
case CMD_RENAME:
    opType = Rename;
    break;
case CMD_SYMLINK:
    opType = Symlink;
    break;
}
job->d_func()->m_operationType = opType;

command in this case is an int and there's no other checks here to let the compiler know that command could only be one of those three values. There's a comment here but even I don't know whether the comment discusses what *should* be true or what *is* actually checked elsewhere.

Since even I was confused I don't blame the compiler. So I add a default branch that just returns the job unmodified. There may be a better error condition here.

Builds, installs, KIO-using software works fine still.