general mechanisms is enabled by calling Perl with the B<-d> switch, the
following additional features are enabled (cf. L<perlvar/$^P>):
-=over
+=over 4
=item *
The fields of interest which may appear in the last line are
-=over
+=over 4
=item C<anchored> I<STRING> C<at> I<POS>
Here is some explanation of that format:
-=over
+=over 4
=item C<buckets SMALLEST(APPROX)..GREATEST(APPROX)>
Here are explanations for other I<Id>s above:
-=over
+=over 4
=item C<717>
If warn() string starts with
-=over
+=over 4
=item C<!!!>