I see the Linkage "Problem" as one that should continue to work as it did in 
V4.  After all, many languages use a simple pointer to refer back to the real 
storage in the calling program.   

Other things, such as overrunning an array's subscript, which was a favourite 
trick of mine in my FORTRAN days, is definitely a violation of the intent of 
the rules and you do so at your own risk.  When the compilers are 
changed...well, you asked for it.

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