yes, your code snippet dumps core

my $dsgn = subA();
$dsgn->method();

sub subA {
  my $obj = new (c++_object);
  return $obj;
}
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however, a "minor" change to the code works

my $obj = new (c++_object)
subA($obj)

sub subA {
  my ($object) = @_;
  $object->method();
}
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that's what i mean about up & down in other posts. in other words

    CALLEE can NOT return OBJECT

    CALLER can ALWAYS pass OBJECT
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and the C++ folks say that it is PERL deleting the object because it is no longer in scope.