=item *
+L<perl5db.pl> has been upgraded from 1.48 to 1.49.
+
+The debugger would cause an assertion failure. [perl #124127]
+
+=item *
+
L<PerlIO::mmap> has been upgraded from version 0.013 to 0.014.
=item *
initialized buffer entirely. This caused F<op/pack.t> to fail. [perl
#123971]
+=item *
+
+Extending an array cloned from a parent thread could result in
+"Modification of a read-only value attempted" errors when attempting
+to modify the new elements. [perl #124127]
+
=back
=head1 Known Problems