Possible issue with awk

[Johannes Stezenbach]

On Thu, Mar 11, 2010 at 12:50:11PM +0100, Denys Vlasenko wrote:
> On Thu, Mar 11, 2010 at 11:47 AM, Johannes Stezenbach <js at sig21.net> wrote:
> > Actually the spec says "Function parameter names shall be local to the
> > function; all other variable names shall be global."
> >
> > -> no special handling for loop variable names, they are global
> 
> Right.
> 
> > And looking at the script, it should work correctly with that:
> >
> >  for (l in libs)
> >    output(l);
> >
> > output() changes l, but that should not be a problem for
> > the given script;
> 
> The problem isn't in changed value of l.
> 
> The problem is that inner loop trashes *the list of strings
> we are iterating over* in outer loop, and thus outer loop's
> iteration is broken (it does not iterate over all strings).

Yes, you are right.  However, I was merely pointing out
that the standard defines the loop variable semantics
and that both gawk and mawk follow that standard in
this respect.


Johannes