The issue seems real. Consider:

use strict;
use warnings;

wibble ();
wibble ();

sub wibble {
    my $unicode16Str;
    
    open my $UTF, '>:encoding(UTF-16LE)', \$unicode16Str;
    print $UTF "Wibble";
    close $UTF;
}

[download]

Generates:

Use of uninitialized value in open at noname1.pl line 10.

[download]

for the second call. However changing my $unicode16Str; to my $unicode16Str = '';

runs clean. Making $unicode16Str global to the sub is also fine. A closure issue perhaps?

DWIM is Perl's answer to Gödel

In reply to Re: Use of uninitialized value in open second time but not first. by GrandFather
in thread Use of uninitialized value in open second time but not first. by kyle

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