I guess I've always assumed that beyond the conditions documented in perldoc perlsub an lvalue subroutine was treated as the modifiable value it represents.

For giggles I was messing around with local and lvalue subroutines and I'm wondering why a scalar accessed via an lvalue subroutine value seemingly can't be localized?

A quick look with Scalar::Util::refaddr tells me after the local() call I am indeed dealing with the same address still.

#!/usr/bin/perl
use strict;
use warnings;

package Foo;
our $level = 1;
sub level :lvalue {$Foo::level}

package main;
print $Foo::level;
{
    local Foo->level = 2;    # Doesn't localize.
    # local $Foo::level = 2; # Does localize.
    print $Foo::level;
}
print $Foo::level;

#Expected: 121
#Result:   122
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