I know that in string context $! will print an error message (under the correct circumstances):

open(...) or die "Oops: $!";

I was wondering if that is the same string or if it is different from the value passed to a signal handler written to handle a SIGWARN/DIE:

$SIG{WARN} = sub { print "doh: ".$_[0]; return; }

In reply to $! vs the @_ passed to your SIG(DIEWARN) handler by AidanLee

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