[Interest] Looks like a bug to me.

[Bill Crocker]

Hello (No, this is not spam):

For me, the following:

   QString a = "XXX";
   QString b = "";
   QString c = "";
   QString d = "1";
   qDebug() << QString("A: %1%2%3%4") .arg(a) .arg(b) .arg(c) .arg(d);
   qDebug() << QString("B: %4%1%2%3") .arg(b) .arg(c) .arg(d) .arg(a);

prints this:

   "A: XXX1"				# As expected.
   "B: XXX"				# Expected: XXX1.

I think the 'B:' line demonstrates a bug.
Where is the '1'?

Qt 5.7
RedHat Enterprise Linux 6.8
gcc: 4.9.3

Bill