This is not directly related with the autovivication issue you're experiencing, but please note that your program would not even compile using the following: 
use strict;
use warnings;

[download]
because $foo and $bar haven't been properly declared.

You should really use these pragmas for all your programs, except possibly one-liners. They let the compiler help you preventing many mistakes.

In reply to Re: Undef becomes hash reference somehow by Laurent_R
in thread Undef becomes hash reference somehow by ipherian

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