http://www.perlmonks.org?node_id=21574


in reply to Fun with $SIG{__DIE__}

From Programming Perl:
The routine indicated by $SIG{__DIE__} is called when a fatal exception is about to be thrown. The error message is passed as the first argument.
So you probably want something like:
$SIG{__DIE__}=sub {print LOG "Script Died: $_[0]" and close LOG if DEB +UGING};