Demonstration: 
sub f(&) { my ($cr) = @_; push @keep_alive, $cr; say $cr; }

my $x = '...';

f { '...' } for 1..2;
f { $x }    for 1..2;

[download]
CODE(0x3396f4)  \ same for non-capturing
CODE(0x3396f4)  /
CODE(0x24b1cc)  \ different for capturing
CODE(0x338c04)  /

[download]

In reply to Re^2: References for ano subs fixed at compile time? by ikegami
in thread References for ano subs fixed at compile time? by LanX

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