keys doesn't propagate the outer context to its argument. 
#!/usr/bin/perl
use strict;
use warnings;

my $x;
1 for %$x;
print $x, "\n";  # HASH(0x26a18cd)

[download]

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In reply to Re^9: Array dereference in foreach() by choroba
in thread Array dereference in foreach() by pme

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