MCH4227 Dumps in V6R1 with *NOUNREF in H-Specs

Hi all,

This is just a heads-up for anyone on V6R1.

V6R1 adds the new H-Spec option *NOUNREF which tells the compiler to leave
out unreferenced variables in the program object. We found a bug today what
can cause your compiles to dump with MCH4227 (translation error/invalid
stream). No clue in spool or job log about the root cause of the error.

What we found is that if you have a compile time array defined (this was a
little fix program, in case you are wondering why there would be a compile
time array in the first place), but do not reference the compile time array
in your program, the compile dumps unceremoniously.

This program fails to compile on our V6R1, latest CUM:
h option(*NOUNREF)
d arSiz s 3 dim(1) ctdata perrcd(1)
d sSiz s 3
/free
*inlr = *on;
/end-free
**
1.0

If you remove *NOUNREF, or add 'dSiz = arSiz(1);' to the code, then you get
a clean compile.

We will get this reported and hopefully fixed. I wanted to get it out for
everyone just in case you hit it before a fix is ready. It is not hard to
work around, but you need to know what the error is before you can work
around it.

Thanks,
Dave