if ($temp =~ /#/){
        $temp =~ s/#$'//;
}

[download]

That's what's causing the problem: $' can contain arbitrary data, but you try to treat it as a regex.

The "good" solution is to use this regex instead: $temp =~ s/#.*$//;

In general you can also quote interpolated variables, then they are treated as text, not as regexes: 

my $varaible = '[a-z]';
m/\Q$variable\E/  # matches literal [a-z], not a character class.

[download]

If you're not inside a regex, quotemeta does the same job.

In reply to Re: Regex error when [] occurs in file.. by moritz
in thread Regex error when [] occurs in file.. by why_bird

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