Zigdon's answer is perfectly correct.

So this is offered as a more generalized solution. Just override the offending function like so: 

use subs qw( warn);
sub warn { die @_}

warn "This is a warning";

print "NOT REACHED\n";

[download]

In reply to Re: How can I tell at run time that my script is writing to STDERR? by rir
in thread How can I tell at run time that my script is writing to STDERR? by Dave05

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