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copied!<p>That perldoc gives you the short answer, but a brief STFW session yields a little more detail. This is basically evidence of a smashed stack in Perl.</p> <p>Trivial example:</p> <pre><code>#!/usr/bin/perl my @A = 1..5; sub blowUp { undef @A; my $throwAway = {}; print for @_; # <== line 6 } blowUp(@A); __END__ bash$ ./blowitup Bizarre copy of HASH in print at ./blowitup line 6. </code></pre> <p>And to make it that much more entertaining, without the $throwAway assignment, it's an invisible error (though under 'use warnings' it will at least still tell you that you're trying to access an uninitialized value). It's just when you make a new assignment that you see the strange behavior.</p> <p>Since @_ is essentially lexically scoped to the subroutine, and arguments are passed by reference, that little subroutine basically pulls the rug out from under itself by undef'ing the thing that @_ was pointing to (you get the same behavior if you change the undef to an assignment, fwiw). I've found a number of postings on perl5-porters that mention this as an artifact of the fact that items on the stack are not reference counted and therefore not cleanly freed.</p> <p>So while I haven't looked through all of the code in your full source in depth, I'll go ahead and guess that something in there is messing with something that was passed in on @_ ; then when @_ is referenced again, Perl is telling you that something's rotten in Denmark.</p> <p>The immediate problem is a bug in the script/module, iow. The deeper issue of Perl not reference counting these items is also there, but I suspect you'll have better luck fixing the module in the short term. :-)</p> <p>HTH- Brian</p>

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