It's the result of the following in perl5db.pl: 

BEGIN {
    require feature;
    $^V =~ /^v(\d+\.\d+)/;
    feature->import(":$1");
    $_initial_cwd = Cwd::getcwd();
}

[download]

(On a side note, it's pretty silly you can't do use feature $^V;.)

In reply to Re: Perl debugger is interactively using features by ikegami
in thread Perl debugger is interactively using features by LanX

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