[ List each enhancement as a =head2 entry ]
+=head2 The C<sprintf> C<%j> format size modifier is now available with
+pre-C99 compilers
+
+The actual size used depends on the platform, so remains unportable.
+
=head1 Security
XXX Any security-related notices go here. In particular, any security
B<NOTE>: L<Locale::Codes> is deprecated in core and will be removed
from Perl 5.30.
+=item *
+
+L<Data::Dumper> has been upgraded from version 2.167_02 to 2.168.
+Quoting of glob names now obeys the Useqq option [perl #119831].
+
=back
=head2 Removed Modules and Pragmata
Additionally, the following selected changes have been made:
+=head3 L<perlapi>
+
+The documentation of C<newGIVENOP()> has been belatedly updated to
+account for the removal of lexical C<$_>.
+
=head3 L<perluniprops>
For each binary table or property, the documentation now includes which
=item *
-XXX L<message|perldiag/"message">
+L<Can't "goto" into a "given" block|perldiag/"Can't E<quot>gotoE<quot> into a E<quot>givenE<quot> block">
+
+(F) A "goto" statement was executed to jump into the middle of a C<given>
+block. You can't get there from here. See L<perlfunc/goto>.
=back
significant internal changes for future core maintainers should be noted as
well.
-[ List each change as an =item entry ]
-
=over 4
=item *
-XXX
+XS modules can now automatically get reentrant versions of system
+functions on threaded perls.
+
+By saying
+
+ #define PERL_REENTRANT
+
+near the beginning of an C<XS> file, it will be compiled so that
+whatever reentrant functions perl knows about on that system will
+automatically and invisibly be used instead of the plain, non-reentrant
+versions. For example, if you write C<getpwnam()> in your code, on a
+system that has C<pwnam_r()> all calls to the former will be translated
+invisibly into the latter. This does not happen except on threaded
+perls, as they aren't needed otherwise. Be aware that which functions
+have reentrant versions varies from system to system.
=back
Perl's own C<malloc> no longer gets confused by attempts to allocate
more than a gigabyte on a 64-bit platform. [perl #119829]
+=item *
+
+C<open $$scalarref...> and similar invocations no longer leak the file
+handle. [perl #115814]
+
+=item *
+
+The default typemap, by avoiding C<newGVgen>, now no longer leaks when
+XSUBs return file handles (C<PerlIO *> or C<FILE *>). [perl #115814]
+
=back
=head1 Known Problems