But you're definitely in the territory of "unpredictable behaviour"

I may be being somewhat picky (or I may even be downright wrong), but I don't see any "unpredictable behaviour" there. I agree that one needs to be careful when modifying an array by iterating over the same array, but the following does behave predictably: 
use strict;
use warnings;
my @array = ('a');
foreach (@array) {
    push @array,'a';
    print"@array\n";
    sleep(1); # so we can absorb what's happening
}

[download]
Cheers,
Rob

In reply to Re^4: self-feeding infinite loop by syphilis
in thread self-feeding infinite loop by spx2

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