Actually, I'm not sure I should have mentioned local. I think 5.6's our declaration is actually closer. But anyway, try this:

in A.pl

package A;

use Z;

$SIG{__DIE__} = sub { die 'in ' . __PACKAGE__ };

eval { die };
print "$@";
eval { Z::Zdie };
print "$@";

and in a separate file (Z.pm):

package Z;

$SIG{__DIE__} = sub { die 'in ' . __PACKAGE__ };

sub Zdie { die }

You'll get this output:

in A at A.pl line 5.
in A at A.pl line 5.

A's signal handler is the one that is used for both deaths.

The reason I mentioned local is that some people try using local to 'fix' this (I know its not a bug) so that the each package could declare signal handlers.

Now change the top of A.pl to this:

package A;

use Sig::Lexical::Paranoid;

use Z;

$SIG{__DIE__} = sub { die 'in ' . __PACKAGE__ };

You'll get this:

in A at A.pl line 7.
in Z at Z.pm line 3.

Note that despite the fact that A assigned directly to $SIG{__DIE__}, it did not overwrite Z's signal handler

This may be useful.

- dave