die "foo";    # prints as "foo at script line whatever\n" - stringified
#die "foo", "foo";  # stringified - same as above but with "foofoo"
#die {hi => 'there'};  # not stringified - shows correctly as a hashref
#die 'foo',{hi => 'there'}; # stringified "fooHASH{whatever}"
#warn {hi => 'there'};  # always stringified