but frustratingly seems to run from command line and
from Perl debugger.
p4raw-id: //depot/perl@15525
BEGIN
{
+ if ($^O eq 'os390') { print "1..0\n"; exit(0) }
$| = 1;
unshift @INC, '../lib'; # for running manually
my $location = $0; $location =~ s/mbi_rand.t//;