Bug in gams

The fragment below demonstrates a bug in GAMS. From early analysis it looks like this is fairly difficult to encounter in a real model, so it may be less alarming than it looks like at first sight.

   1   SET NUM /1*2/;
   2   VARIABLE X(NUM);
   3   X.L(NUM) = ORD(NUM);
   4
   5   X.FX('2') $(X.LO('2') EQ X.UP('2')) = 234;
   6   DISPLAY X.LO,X.L,X.UP;
 
COMPILATION TIME     =        0.000 SECONDS      3 Mb  WEX228-228 Jul 26, 2008
 
----      6 VARIABLE X.Lo
 2 234.000
----      6 VARIABLE X.L
 1   1.000,    2 234.000
----      6 VARIABLE X.Up
 2 234.000