Also, if you would have 'use strict': then you would have gotten an error: 'Bareword "LOG" not allowed while "strict subs" in use'...
Just wanted to note that prototyping carpout to expect a filehandle name fixes the bareword error, but not the "used only once" warning. IMO this could be construed as a bug. 
$ cat carpout.pl; perl carpout.pl
#!/usr/bin/perl -w
use strict;
sub carpout(*);
sub handle_error
{
    if (open LOG, ">/dev/null") {
        carpout(LOG);
    }
}
print "hello world.\n";
Name "main::LOG" used only once: possible typo at carpout.pl line 6.
hello world.

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In reply to Re^2: unnecessary warning message? by ysth
in thread unnecessary warning message? by argv

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