You sub, _list_files, is expecting 2 parameters. You are only passing one. Since _list_files treats the second parameter as a reference, you need to pass a reference:

use strict;
use warnings;

my $cwd = getcwd;

my @file_list;

my $res = _list_files($cwd, \@file_list);

# definition of _list_files($cwd omitted)

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In reply to Re: Descending a directory tree, returning a list of files by RonW
in thread Descending a directory tree, returning a list of files by Rodster001

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