CAT bug in ILE RPG

[Majobo@xxxxxxx]

Has anyone else run across bugs with the CAT operation code in RPG IV?  Using
CAT in some situations gives us unpredictable results, such as fields being
concatenated in the wrong order.  If we use EVAL and the plus sign on the same
fields to concatenate them, the program works fine!

field1  CAT  field2:0   resultfld
          CAT  field3:0   resultfld
             .
             .
             .
          CAT  field9:0   resultfld

The above does not work, but the following does work (we use %trimr because
all 9 fields have trailing blanks):

          EVAL     resultfld=%trimr(field1)+%trimr(field2)+ ...
+%trimr(field9)

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