I don't think the multiple usage of $_ is problematic here. According to perlsyn the global $_ gets localized in a foreach loop. Indeed: 

#!/usr/bin/perl

use v5.16;
use warnings;

foreach (1, 2) {
    say for qw(a b);
    say;
    foreach (10, 20) {
        say;
    }
    say;
}

__DATA__
a
b
1
10
20
1
a
b
2
10
20
2

[download]

Greetings,
-jo

$gryYup$d0ylprbpriprrYpkJl2xyl~rzg??P~5lp2hyl0p$

In reply to Re^2: Next from inner loop only works "most of the time" by jo37
in thread Next from inner loop only works "most of the time" by Marshall

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