new perldelta for 5.19.10

4 files changed, 960 insertions, 543 deletions

diff --git a/pod/.gitignore b/pod/.gitignore
index 884e6c32c6..637ba92837 100644
--- a/pod/.gitignore
+++ b/pod/.gitignore
@@ -59,7 +59,7 @@
 /roffitall
 
 # generated
-/perl5199delta.pod
+/perl51910delta.pod
 /perlapi.pod
 /perlintern.pod
 *.html
diff --git a/pod/perl.pod b/pod/perl.pod
index 89c6d0b4fa..0d1755bf9f 100644
--- a/pod/perl.pod
+++ b/pod/perl.pod
@@ -179,6 +179,7 @@ aux a2p c2ph h2ph h2xs perlbug pl2pm pod2html pod2man s2p splain xsubpp
 
     perlhist		Perl history records
     perldelta		Perl changes since previous version
+    perl5199delta	Perl changes in version 5.19.9
     perl5198delta	Perl changes in version 5.19.8
     perl5197delta	Perl changes in version 5.19.7
     perl5196delta	Perl changes in version 5.19.6
diff --git a/pod/perl5199delta.pod b/pod/perl5199delta.pod
new file mode 100644
index 0000000000..6aafb4b361
--- /dev/null
+++ b/pod/perl5199delta.pod
@@ -0,0 +1,779 @@
+=encoding utf8
+
+=head1 NAME
+
+perl5199delta - what is new for perl v5.19.9
+
+=head1 DESCRIPTION
+
+This document describes differences between the 5.19.8 release and the 5.19.9
+release.
+
+If you are upgrading from an earlier release such as 5.19.7, first read
+L<perl5198delta>, which describes differences between 5.19.7 and 5.19.8.
+
+=head1 Core Enhancements
+
+=head2 UTF-8 locales now supported better under C<S<use locale>>
+
+A UTF-8 locale is one in which the character set is Unicode and the
+encoding is UTF-8.  Now, the POSIX C<LC_CTYPE> category operations under
+such a locale (within the scope of C<S<use locale>>), which include case
+changing (like C<lc()>, C<"\U">), and character classification (C<\w>,
+C<\D>, C<qr/[[:punct:]]/> work just as if not under locale, except taint
+rules are followed.  Prior to this, Perl only handled single-byte
+locales.  This resolves [perl #56820].
+
+=head2 C<S<use locale>> now compiles on systems without locale ability
+
+Previously doing this caused the program to not compile.  Within its
+scope the program behaves as if in the "C" locale.  Thus programs
+written for platforms that support locales can run on locale-less
+platforms without change.  Attempts to change the locale away from the
+"C" locale will, of course, fail.
+
+=head2 PERL_DEBUG_READONLY_COW
+
+On some operating systems Perl can be compiled in such a way that any
+attempt to modify string buffers shared by multiple SVs will crash.  This
+way XS authors can test that their modules handle copy-on-write scalars
+correctly.  See L<perlguts/"Copy on Write"> for detail.
+
+This feature was actually added in 5.19.8, but was unintentionally omitted
+from its delta document.
+
+=head2 C<-DL> runtime option now added for tracing locale setting
+
+This is designed for Perl core developers to aid in field debugging bugs
+regarding locales.
+
+=head2 Subroutine signatures
+
+Declarative syntax to unwrap argument list into lexical variables.
+C<sub foo ($a,$b) {...}> checks the number of arguments and puts the
+arguments into lexical variables.  Signatures are not equivalent to
+the existing idiom of C<sub foo { my($a,$b) = @_; ... }>.  Signatures
+are only available by enabling a non-default feature, and generate
+warnings about being experimental.  The syntactic clash with
+prototypes is managed by disabling the short prototype syntax when
+signatures are enabled.
+
+See L<perlsub/Signatures> for details.
+
+=head2 More locale initialization fallback options
+
+If there was an error with locales during Perl start-up, it immediately
+gave up and tried to use the C<"C"> locale.  Now it first tries using
+other locales given by the environment variables, as detailed in
+L<perllocale/ENVIRONMENT>.  For example, if C<LC_ALL> and C<LANG> are
+both set, and using the C<LC_ALL> locale fails, Perl will now try the
+C<LANG> locale, and only if that fails, will it fall back to C<"C">.  On
+Windows machines, Perl will try, ahead of using C<"C">, the system
+default locale if all the locales given by environment variables fail.
+
+=head1 Incompatible Changes
+
+=head2 Tainting happens under more circumstances; now conforms to documentation
+
+This affects regular expression matching and changing the case of a
+string (C<lc>, C<"\U">, I<etc>.) within the scope of C<use locale>.
+The result is now tainted based on the operation, no matter what the
+contents of the string were, as the documentation (L<perlsec>,
+L<perllocale/SECURITY>) indicates it should.  Previously, for the case
+change operation, if the string contained no characters whose case
+change could be affected by the locale, the result would not be tainted.
+For example, the result of C<uc()> on an empty string or one containing
+only above-Latin1 code points is now tainted, and wasn't before.  This
+leads to more consistent tainting results.  Regular expression patterns
+taint their non-binary results (like C<$&>, C<$2>) if and only if the
+pattern contains elements whose matching depends on the current
+(potentially tainted) locale.  Like the case changing functions, the
+actual contents of the string being matched now do not matter, whereas
+formerly it did.  For example, if the pattern contains a C<\w>, the
+results will be tainted even if the match did not have to use that
+portion of the pattern to succeed or fail, because what a C<\w> matches
+depends on locale.  However, for example, a C<.> in a pattern will not
+enable tainting, because the dot matches any single character, and what
+the current locale is doesn't change in any way what matches and what
+doesn't.
+
+=head2 Quote-like escape changes
+
+The character after C<\c> in a double-quoted string ("..." or qq(...))
+or regular expression must now be a printable character and may not be
+C<{>.
+
+A literal C<{> after C<\B> or C<\b> is now fatal.
+
+These were deprecated in perl v5.14.
+
+=head1 Deprecations
+
+=over 4
+
+=item *
+
+Setting C<$/> to a reference to zero or a reference to a negative integer is
+now deprecated, and will behave B<exactly> as though it was set to C<undef>.
+If you want slurp behavior set C<$/> to C<undef> explicitly.
+
+=item *
+
+Setting C<$/> to a reference to a non integer is now forbidden and will
+throw an error. Perl has never documented what would happen in this
+context and while it used to behave the same as setting C<$/> to
+the address of the references in future it may behave differently, so we
+have forbidden this usage.
+
+=item *
+
+Use of any of these functions in the C<POSIX> module is now deprecated:
+C<isalnum>, C<isalpha>, C<iscntrl>, C<isdigit>, C<isgraph>, C<islower>,
+C<isprint>, C<ispunct>, C<isspace>, C<isupper>, and C<isxdigit>.  The
+functions are buggy and don't work on UTF-8 encoded strings.  See their
+entries in L<POSIX> for more information.
+
+A warning is raised on the first call to any of them from each place in
+the code that they are called.  (Hence a repeated statement in a loop
+will raise just the one warning.)
+
+=back
+
+=head1 Performance Enhancements
+
+=over 4
+
+=item *
+
+Code like:
+
+  my $x; # or @x, %x
+  my $y;
+
+is now optimized to:
+
+  my ($x, $y);
+
+In combination with the padrange optimization, this means longer
+uninitialized my variable statements are also optimized, so:
+
+  my $x; my @y; my %z;
+
+becomes:
+
+  my ($x, @y, %z);
+
+[perl #121077]
+
+=back
+
+=head1 Modules and Pragmata
+
+=head2 Updated Modules and Pragmata
+
+=over 4
+
+=item *
+
+L<autodie> has been upgraded from version 2.22 to 2.23.
+
+C<autodie> no longer weakens strict by allowing undeclared variables
+with the same name as built-ins.  [cpan #74246]
+
+C<use autodie qw( foo ! foo);> now correctly insists that we have
+hints for foo.
+
+=item *
+
+L<B> has been upgraded from version 1.47 to 1.48.
+
+Remove the obsolete C<DEREFed> flag from L<B::Concise>.
+
+=item *
+
+L<B::Deparse> has been upgraded from version 1.24 to 1.25.
+
+It now knows how to handle whitespace in prototypes.  Previously, it could
+loop infinitely.  [perl #121050]
+
+=item *
+
+L<CGI> has been upgraded from version 3.64 to 3.65.
+
+=item *
+
+L<Compress::Raw::Bzip2> has been upgraded from version 2.063 to 2.064.
+
+Handle non-PVs better.  [cpan #91558]
+
+=item *
+
+L<Compress::Raw::Zlib> has been upgraded from version 2.063 to 2.065.
+
+Handle non-PVs better.  [cpan #91558]
+
+Z_OK instead of Z_BUF_ERROR.  [cpan #92521]
+
+Resolve a C++ build failure in core.  [cpan #92657]
+
+=item *
+
+L<Config::Perl::V> has been upgraded from version 0.19 to 0.20.
+
+Synchronize with blead (bincompat options)
+
+=item *
+
+L<CPAN::Meta::YAML> has been upgraded from version 0.010 to 0.011.
+
+=item *
+
+L<Devel::Peek> has been upgraded from version 1.15 to 1.16.
+
+Devel::Peek::SvREFCNT() now ensures it has been passed a reference, as
+specified by its prototype.
+
+=item *
+
+L<diagnostics> has been upgraded from version 1.33 to 1.34.
+
+=item *
+
+L<Digest::SHA> has been upgraded from version 5.85 to 5.87.
+
+Improved the performance of hexadecimal output functions and simplified capture
+of intermediate SHA states, which can now be done via strings (see
+C<L<getstate()|Digest::SHA/getstate>>/C<L<putstate()|Digest::SHA/putstate($str)>>).
+
+=item *
+
+L<DynaLoader> has been upgraded from version 1.24 to 1.25.
+
+Android support.
+
+=item *
+
+L<English> has been upgraded from version 1.08 to 1.09.
+
+Added C<$OLD_PERL_VERSION> as an alias for C<$]>.
+
+=item *
+
+L<ExtUtils::CBuilder> has been upgraded from version 0.280213 to 0.280216.
+
+Android support.
+
+=item *
+
+L<ExtUtils::Embed> has been upgraded from version 1.31 to 1.32.
+
+Skip tests when cross-compiling and $Config{cc} isn't available.
+
+=item *
+
+L<ExtUtils::Install> has been upgraded from version 1.61 to 1.62.
+
+Skip tests when cross-compiler and make isn't available.
+
+=item *
+
+L<ExtUtils::MakeMaker> has been upgraded from version 6.86 to 6.88.
+
+Improved support for Android and other minor changes.
+
+=item *
+
+L<feature> has been upgraded from version 1.34 to 1.35.
+
+=item *
+
+L<File::Fetch> has been upgraded from version 0.46 to 0.48.
+
+Force curl to be IPv4 only during testing on NetBSD.
+
+=item *
+
+L<HTTP::Tiny> has been upgraded from version 0.039 to 0.042.
+
+Added support for keep-alive connections.
+
+If L<IO::Socket::IP> 0.25 or later is available, use that for
+transparent IPv4 or IPv6 support.
+
+=item *
+
+L<inc::latest> has been upgraded from version 0.4204 to 0.4205.
+
+NOTE: L<inc::latest> is deprecated and may be removed from a future version of Perl.
+
+=item *
+
+The IO-Compress module collection has been upgraded from version 2.063
+to 2.064.
+
+Android support.
+
+=item *
+
+L<IO::Socket::IP>, tentatively introduced in L<Perl 5.19.8|perl5198delta>,
+has been upgraded from 0.26 to 0.28.
+
+=item *
+
+L<IPC::Cmd> has been upgraded from version 0.90 to 0.92.
+
+=item *
+
+The libnet module collection has been upgraded from version 1.24 to 1.25.
+
+The creation of L<Net::FTP> dataconnections now honour the requested timeout,
+errors from C<Net::Cmd::response()> are now handled in C<Net::FTP::pasv_wait()>
+and a warning from C<Net::Domain::domainname()> on Android is now stopped.
+
+=item *
+
+L<locale> has been upgraded from version 1.02 to 1.03.
+
+Allow C<use locale;> on systems without locales, such as Android.
+
+=item *
+
+L<Locale::Codes> has been upgraded from version 3.28 to 3.29.
+
+=item *
+
+L<Module::Build> has been upgraded from version 0.4204 to 0.4205.
+
+Fix license code regression for artistic license.
+
+Don't swallow ExtUtils::CBuilder loading errors.
+
+Handle testing on cross-compile builds.
+
+Protect against platforms without getpw{nam,uid}.
+
+=item *
+
+L<Module::CoreList> has been upgraded from version 3.04 to 3.06.
+
+=item *
+
+L<Module::Load> has been upgraded from version 0.28 to 0.30.
+
+Prevent uninitialized warnings during testing.
+
+=item *
+
+L<Module::Load::Conditional> has been upgraded from version 0.60 to 0.62.
+
+=item *
+
+L<mro> has been upgraded from version 1.14 to 1.15.
+
+Use HEKfARG() instead of creating and throwing away SVs.
+
+=item *
+
+L<Net::Ping> has been upgraded from version 2.42 to 2.43.
+
+Handle getprotobyname() or getprotobynumber() not being available.
+
+=item *
+
+L<Parse::CPAN::Meta> has been upgraded from version 1.4409 to 1.4413.
+
+Invalid UTF-8 encoding in YAML files are now replaced with "PERLQQ"
+quoting from the Encode module and without warnings.
+
+Removed legacy test modifications for testing with the perl core.
+
+=item *
+
+The PathTools module collection has been upgraded from version 3.45 to
+3.46.
+
+Improved support for Android.
+
+C<< File::Spec::Unix->tmpdir >> now consistently returns an absolute
+path, unless in taint mode.  [perl #120593]
+
+=item *
+
+L<Pod::Escapes> has been upgraded from version 1.04 to 1.06.
+
+Now strict and warning clean.  Several minor documentation updates.
+
+e2charnum() no longer treats non-ASCII Unicode digits as suitable for
+an escape.  [cpan #70246]
+
+=item *
+
+L<Pod::Parser> has been upgraded from version 1.61 to 1.62.
+
+=item *
+
+L<POSIX> has been upgraded from version 1.38_01 to 1.38_02.
+
+Deprecate use of isfoo() functions.
+
+=item *
+
+L<Scalar::Util> has been upgraded from version 1.36 to 1.38.
+
+A backwards-compatibility issue with older perls has been fixed.  [cpan #92363]
+
+=item *
+
+L<threads> has been upgraded from version 1.91 to 1.92.
+
+Synchronization with CPAN release.
+
+=item *
+
+L<version> has been upgraded from version 0.9907 to 0.9908.
+
+=item *
+
+L<warnings> has been upgraded from version 1.21 to 1.22.
+
+C<< use warnings "FATAL"; >> now implies C<< "all" >>, and similarly
+for C<< use warnings "NONFATAL" >>.  [perl #120977]
+
+=back
+
+=head1 Documentation
+
+=head2 Changes to Existing Documentation
+
+=head3 L<perlfunc>
+
+=over 4
+
+=item *
+
+L<perlfunc/exec>'s handling of arguments is now more clearly
+documented.
+
+=back
+
+=head3 L<perlguts>
+
+=over 4
+
+=item *
+
+New sections on L<Read-Only Values|perlguts/"Read-Only Values"> and
+L<Copy on Write|perlguts/"Copy on Write"> have been added.  They were
+actually added in 5.19.8 but accidentally omitted from its delta document.
+
+=back
+
+=head1 Diagnostics
+
+The following additions or changes have been made to diagnostic output,
+including warnings and fatal error messages.  For the complete list of
+diagnostic messages, see L<perldiag>.
+
+=head2 New Diagnostics
+
+=head3 New Errors
+
+=over 4
+
+=item *
+
+Added L<Setting $E<sol> to a %s reference is forbidden|perldiag/"Setting $E<sol> to a %s reference is forbidden">
+
+=back
+
+=head3 New Warnings
+
+=over 4
+
+=item *
+
+Added L<Setting $E<sol> to a reference to %s as a form of slurp is deprecated, treating as undef|perldiag/"Setting $E<sol> to a reference to %s as a form of slurp is deprecated, treating as undef">
+
+=back
+
+=head1 Configuration and Compilation
+
+=over 4
+
+=item *
+
+The cross-compilation model has been renovated.
+There's several new options, and some backwards-incompatible changes:
+
+We now build binaries for miniperl and generate_uudmap to be used on the host, rather than running
+every miniperl call on the target; this means that, short of 'make test',
+we no longer need access to the target system once Configure is done.
+You can provide already-built binaries through the C<hostperl> and
+C<hostgenerate> options to Configure.
+
+Additionally, if targeting an EBCDIC platform from an ASCII host,
+or viceversa, you'll need to run Configure with C<-Uhostgenerate>, to
+indicate that generate_uudmap should be run on the target.
+
+Finally, there's also a way of having Configure end early, right after
+building the host binaries, by cross-compiling without specifying a
+C<targethost>.
+
+The incompatible changes include no longer using xconfig.h, xlib, or
+Cross.pm, so canned config files and Makefiles will have to be updated.
+
+=item *
+
+Related to the above, there is now a way of specifying the location of sh
+(or equivalent) on the target system: C<targetsh>.
+
+For example, Android has its sh in /system/bin/sh, so if cross-compiling
+from a more normal Unixy system with sh in /bin/sh, "targetsh" would end
+up as /system/bin/sh, and "sh" as /bin/sh.
+
+=back
+
+=head1 Platform Support
+
+=head2 New Platforms
+
+=over 4
+
+=item Android
+
+Perl can now be built for Android, either natively or through
+cross-compilation, for all three currently available architectures (ARM,
+MIPS, and x86), on a wide range of versions.
+
+=back
+
+=head2 Platform-Specific Notes
+
+=over 4
+
+=item VMS
+
+Skip access checks on remotes in opendir().  [perl #121002]
+
+=item Cygwin
+
+Fixed a build error in cygwin.c on Cygwin 1.7.28.
+
+Tests now handle the errors that occur when C<cygserver> isn't
+running.
+
+=back
+
+=head1 Internal Changes
+
+=over 4
+
+=item Regexp Engine Changes That Affect The Pluggable Regex Engine Interface
+
+Many flags that used to be exposed via regexp.h and used to populate the
+extflags member of struct regexp have been removed. These fields were
+technically private to Perl's own regexp engine and should not have been
+exposed there in the first place.
+
+The affected flags are:
+
+    RXf_NOSCAN
+    RXf_CANY_SEEN
+    RXf_GPOS_SEEN
+    RXf_GPOS_FLOAT
+    RXf_ANCH_BOL
+    RXf_ANCH_MBOL
+    RXf_ANCH_SBOL
+    RXf_ANCH_GPOS
+
+As well as the follow flag masks:
+
+    RXf_ANCH_SINGLE
+    RXf_ANCH
+
+All have been renamed to PREGf_ equivalents and moved to regcomp.h.
+
+The behavior previously achieved by setting one or more of the RXf_ANCH_
+flags (via the RXf_ANCH mask) have now been replaced by a *single* flag bit
+in extflags:
+
+    RXf_IS_ANCHORED
+
+pluggable regex engines which previously used to set these flags should
+now set this flag ALONE.
+
+=back
+
+=head1 Selected Bug Fixes
+
+=over 4
+
+=item *
+
+Backticks (C< `` > or C< qx// >) combined with multiple threads on
+Win32 could result in output sent to stdout on one thread being
+captured by backticks of an external command in another thread.
+
+This could occur for pseudo-forked processes too, as Win32's
+pseudo-fork is implemented in terms of threads.  [perl #77672]
+
+=item *
+
+C<< open $fh, ">+", undef >> no longer leaks memory when TMPDIR is set
+but points to a directory a temporary file cannot be created in.  [perl
+#120951]
+
+=item *
+
+C<$^R> wasn't available outside of the regular expression that
+initialized it.  [perl #121070]
+
+=item *
+
+Fixed a regular expression bug introduced in 5.19.5 where \S, \W etc
+could fail for above ASCII.  [perl #121144]
+
+=item *
+
+A large set of fixes and refactoring for re_intuit_start() was merged,
+the highlights are:
+
+=over
+
+=item *
+
+Fixed a panic when compiling the regular expression
+C</\x{100}[xy]\x{100}{2}/>.
+
+=item *
+
+Fixed a performance regression when performing a global pattern match
+against a UTF-8 string.  [perl #120692]
+
+=item *
+
+Fixed another performance issue where matching a regular expression
+like C</ab.{1,2}x/> against a long UTF-8 string would unnecessarily
+calculate byte offsets for a large portion of the string. [perl
+#120692]
+
+=back
+
+=item *
+
+C< for ( $h{k} || '' ) > no longer auto-vivifies C<$h{k}>.  [perl
+#120374]
+
+=item *
+
+On Windows machines, Perl now emulates the POSIX use of the environment
+for locale initialization.  Previously, the environment was ignored.
+See L<perllocale/ENVIRONMENT>.
+
+=item *
+
+Fixed a crash when destroying a self-referencing GLOB.  [perl #121242]
+
+=item *
+
+Call set-magic when setting $DB::sub.  [perl #121255]
+
+=item *
+
+Fixed an alignment error when compiling regular expressions when built
+with GCC on HP-UX 64-bit.
+
+=back
+
+=head1 Known Problems
+
+=over 4
+
+=item *
+
+The F<lib/locale.t> test may fail rarely.
+
+=back
+
+=head1 Errata From Previous Releases
+
+=over 4
+
+=item perl5180delta.pod
+
+This pod file contains a statement saying that C<RXf_SPLIT> (and its alias
+C<RXf_PMf_SPLIT>) and C<RXf_SKIPWHITE> were no longer used and #defined
+to 0. This was the case for a short period, but the change was reverted
+before Perl 5.18 was released. As such it was not true in Perl 5.18.x,
+and is also not true now. Both flags continue to be used. The incorrect
+entry has been removed from C<perl5180delta.pod> in this release.
+
+=back
+
+=head1 Acknowledgements
+
+Perl 5.19.9 represents approximately 4 weeks of development since Perl 5.19.8
+and contains approximately 47,000 lines of changes across 610 files from 32
+authors.
+
+Excluding auto-generated files, documentation and release tools, there were
+approximately 34,000 lines of changes to 420 .pm, .t, .c and .h files.
+
+Perl continues to flourish into its third decade thanks to a vibrant community
+of users and developers. The following people are known to have contributed the
+improvements that became Perl 5.19.9:
+
+Abigail, Alan Haggai Alavi, Brad Gilbert, Brian Fraser, Chris 'BinGOs'
+Williams, Craig A. Berry, Daniel Dragan, David Golden, David Mitchell, Father
+Chrysostomos, Gavin Shelley, H.Merijn Brand, Hauke D, James E Keenan, Jerry D.
+Hedden, Jess Robinson, John Peacock, Karl Williamson, Matthew Horsfall, Neil
+Williams, Peter Martini, Piotr Roszatycki, Rafael Garcia-Suarez, Reini Urban,
+Ricardo Signes, Steffen Müller, Steve Hay, Sullivan Beck, Tom Hukins, Tony
+Cook, Yves Orton, Zefram.
+
+The list above is almost certainly incomplete as it is automatically generated
+from version control history. In particular, it does not include the names of
+the (very much appreciated) contributors who reported issues to the Perl bug
+tracker.
+
+Many of the changes included in this version originated in the CPAN modules
+included in Perl's core. We're grateful to the entire CPAN community for
+helping Perl to flourish.
+
+For a more complete list of all of Perl's historical contributors, please see
+the F<AUTHORS> file in the Perl source distribution.
+
+=head1 Reporting Bugs
+
+If you find what you think is a bug, you might check the articles recently
+posted to the comp.lang.perl.misc newsgroup and the perl bug database at
+https://rt.perl.org/ .  There may also be information at
+http://www.perl.org/ , the Perl Home Page.
+
+If you believe you have an unreported bug, please run the L<perlbug> program
+included with your release.  Be sure to trim your bug down to a tiny but
+sufficient test case.  Your bug report, along with the output of C<perl -V>,
+will be sent off to perlbug@perl.org to be analysed by the Perl porting team.
+
+If the bug you are reporting has security implications, which make it
+inappropriate to send to a publicly archived mailing list, then please send it
+to perl5-security-report@perl.org.  This points to a closed subscription
+unarchived mailing list, which includes all the core committers, who will be
+able to help assess the impact of issues, figure out a resolution, and help
+co-ordinate the release of patches to mitigate or fix the problem across all
+platforms on which Perl is supported.  Please only use this address for
+security issues in the Perl core, not for modules independently distributed on
+CPAN.
+
+=head1 SEE ALSO
+
+The F<Changes> file for an explanation of how to view exhaustive details on
+what changed.
+
+The F<INSTALL> file for how to build Perl.
+
+The F<README> file for general stuff.
+
+The F<Artistic> and F<Copying> files for copyright information.
+
+=cut
diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index d1c788006a..87563031ae 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -2,696 +2,359 @@
 
 =head1 NAME
 
-perldelta - what is new for perl v5.19.9
+[ this is a template for a new perldelta file.  Any text flagged as XXX needs
+to be processed before release. ]
+
+perldelta - what is new for perl v5.19.10
 
 =head1 DESCRIPTION
 
-This document describes differences between the 5.19.8 release and the 5.19.9
+This document describes differences between the 5.19.9 release and the 5.19.10
 release.
 
-If you are upgrading from an earlier release such as 5.19.7, first read
-L<perl5198delta>, which describes differences between 5.19.7 and 5.19.8.
-
-=head1 Core Enhancements
+If you are upgrading from an earlier release such as 5.19.8, first read
+L<perl5199delta>, which describes differences between 5.19.8 and 5.19.9.
 
-=head2 UTF-8 locales now supported better under C<S<use locale>>
+=head1 Notice
 
-A UTF-8 locale is one in which the character set is Unicode and the
-encoding is UTF-8.  Now, the POSIX C<LC_CTYPE> category operations under
-such a locale (within the scope of C<S<use locale>>), which include case
-changing (like C<lc()>, C<"\U">), and character classification (C<\w>,
-C<\D>, C<qr/[[:punct:]]/> work just as if not under locale, except taint
-rules are followed.  Prior to this, Perl only handled single-byte
-locales.  This resolves [perl #56820].
+XXX Any important notices here
 
-=head2 C<S<use locale>> now compiles on systems without locale ability
+=head1 Core Enhancements
 
-Previously doing this caused the program to not compile.  Within its
-scope the program behaves as if in the "C" locale.  Thus programs
-written for platforms that support locales can run on locale-less
-platforms without change.  Attempts to change the locale away from the
-"C" locale will, of course, fail.
+XXX New core language features go here.  Summarize user-visible core language
+enhancements.  Particularly prominent performance optimisations could go
+here, but most should go in the L</Performance Enhancements> section.
 
-=head2 PERL_DEBUG_READONLY_COW
+[ List each enhancement as a =head2 entry ]
 
-On some operating systems Perl can be compiled in such a way that any
-attempt to modify string buffers shared by multiple SVs will crash.  This
-way XS authors can test that their modules handle copy-on-write scalars
-correctly.  See L<perlguts/"Copy on Write"> for detail.
+=head1 Security
 
-This feature was actually added in 5.19.8, but was unintentionally omitted
-from its delta document.
+XXX Any security-related notices go here.  In particular, any security
+vulnerabilities closed should be noted here rather than in the
+L</Selected Bug Fixes> section.
 
-=head2 C<-DL> runtime option now added for tracing locale setting
+[ List each security issue as a =head2 entry ]
 
-This is designed for Perl core developers to aid in field debugging bugs
-regarding locales.
+=head1 Incompatible Changes
 
-=head2 Subroutine signatures
+XXX For a release on a stable branch, this section aspires to be:
 
-Declarative syntax to unwrap argument list into lexical variables.
-C<sub foo ($a,$b) {...}> checks the number of arguments and puts the
-arguments into lexical variables.  Signatures are not equivalent to
-the existing idiom of C<sub foo { my($a,$b) = @_; ... }>.  Signatures
-are only available by enabling a non-default feature, and generate
-warnings about being experimental.  The syntactic clash with
-prototypes is managed by disabling the short prototype syntax when
-signatures are enabled.
+    There are no changes intentionally incompatible with 5.XXX.XXX
+    If any exist, they are bugs, and we request that you submit a
+    report.  See L</Reporting Bugs> below.
 
-See L<perlsub/Signatures> for details.
+[ List each incompatible change as a =head2 entry ]
 
-=head2 More locale initialization fallback options
+=head1 Deprecations
 
-If there was an error with locales during Perl start-up, it immediately
-gave up and tried to use the C<"C"> locale.  Now it first tries using
-other locales given by the environment variables, as detailed in
-L<perllocale/ENVIRONMENT>.  For example, if C<LC_ALL> and C<LANG> are
-both set, and using the C<LC_ALL> locale fails, Perl will now try the
-C<LANG> locale, and only if that fails, will it fall back to C<"C">.  On
-Windows machines, Perl will try, ahead of using C<"C">, the system
-default locale if all the locales given by environment variables fail.
+XXX Any deprecated features, syntax, modules etc. should be listed here.
 
-=head1 Incompatible Changes
+=head2 Module removals
 
-=head2 Tainting happens under more circumstances; now conforms to documentation
-
-This affects regular expression matching and changing the case of a
-string (C<lc>, C<"\U">, I<etc>.) within the scope of C<use locale>.
-The result is now tainted based on the operation, no matter what the
-contents of the string were, as the documentation (L<perlsec>,
-L<perllocale/SECURITY>) indicates it should.  Previously, for the case
-change operation, if the string contained no characters whose case
-change could be affected by the locale, the result would not be tainted.
-For example, the result of C<uc()> on an empty string or one containing
-only above-Latin1 code points is now tainted, and wasn't before.  This
-leads to more consistent tainting results.  Regular expression patterns
-taint their non-binary results (like C<$&>, C<$2>) if and only if the
-pattern contains elements whose matching depends on the current
-(potentially tainted) locale.  Like the case changing functions, the
-actual contents of the string being matched now do not matter, whereas
-formerly it did.  For example, if the pattern contains a C<\w>, the
-results will be tainted even if the match did not have to use that
-portion of the pattern to succeed or fail, because what a C<\w> matches
-depends on locale.  However, for example, a C<.> in a pattern will not
-enable tainting, because the dot matches any single character, and what
-the current locale is doesn't change in any way what matches and what
-doesn't.
-
-=head2 Quote-like escape changes
-
-The character after C<\c> in a double-quoted string ("..." or qq(...))
-or regular expression must now be a printable character and may not be
-C<{>.
-
-A literal C<{> after C<\B> or C<\b> is now fatal.
-
-These were deprecated in perl v5.14.
+XXX Remove this section if inapplicable.
 
-=head1 Deprecations
+The following modules will be removed from the core distribution in a
+future release, and will at that time need to be installed from CPAN.
+Distributions on CPAN which require these modules will need to list them as
+prerequisites.
 
-=over 4
+The core versions of these modules will now issue C<"deprecated">-category
+warnings to alert you to this fact.  To silence these deprecation warnings,
+install the modules in question from CPAN.
 
-=item *
+Note that these are (with rare exceptions) fine modules that you are encouraged
+to continue to use.  Their disinclusion from core primarily hinges on their
+necessity to bootstrapping a fully functional, CPAN-capable Perl installation,
+not usually on concerns over their design.
 
-Setting C<$/> to a reference to zero or a reference to a negative integer is
-now deprecated, and will behave B<exactly> as though it was set to C<undef>.
-If you want slurp behavior set C<$/> to C<undef> explicitly.
+=over
 
-=item *
+=item XXX
 
-Setting C<$/> to a reference to a non integer is now forbidden and will
-throw an error. Perl has never documented what would happen in this
-context and while it used to behave the same as setting C<$/> to
-the address of the references in future it may behave differently, so we
-have forbidden this usage.
+XXX Note that deprecated modules should be listed here even if they are listed
+as an updated module in the L</Modules and Pragmata> section.
 
-=item *
+=back
 
-Use of any of these functions in the C<POSIX> module is now deprecated:
-C<isalnum>, C<isalpha>, C<iscntrl>, C<isdigit>, C<isgraph>, C<islower>,
-C<isprint>, C<ispunct>, C<isspace>, C<isupper>, and C<isxdigit>.  The
-functions are buggy and don't work on UTF-8 encoded strings.  See their
-entries in L<POSIX> for more information.
+[ List each other deprecation as a =head2 entry ]
 
-A warning is raised on the first call to any of them from each place in
-the code that they are called.  (Hence a repeated statement in a loop
-will raise just the one warning.)
+=head1 Performance Enhancements
 
-=back
+XXX Changes which enhance performance without changing behaviour go here.
+There may well be none in a stable release.
 
-=head1 Performance Enhancements
+[ List each enhancement as a =item entry ]
 
 =over 4
 
 =item *
 
-Code like:
-
-  my $x; # or @x, %x
-  my $y;
-
-is now optimized to:
-
-  my ($x, $y);
-
-In combination with the padrange optimization, this means longer
-uninitialized my variable statements are also optimized, so:
-
-  my $x; my @y; my %z;
-
-becomes:
-
-  my ($x, @y, %z);
-
-[perl #121077]
+XXX
 
 =back
 
 =head1 Modules and Pragmata
 
-=head2 Updated Modules and Pragmata
-
-=over 4
-
-=item *
-
-L<autodie> has been upgraded from version 2.22 to 2.23.
-
-C<autodie> no longer weakens strict by allowing undeclared variables
-with the same name as built-ins.  [cpan #74246]
-
-C<use autodie qw( foo ! foo);> now correctly insists that we have
-hints for foo.
-
-=item *
-
-L<B> has been upgraded from version 1.47 to 1.48.
-
-Remove the obsolete C<DEREFed> flag from L<B::Concise>.
-
-=item *
-
-L<B::Deparse> has been upgraded from version 1.24 to 1.25.
-
-It now knows how to handle whitespace in prototypes.  Previously, it could
-loop infinitely.  [perl #121050]
-
-=item *
-
-L<CGI> has been upgraded from version 3.64 to 3.65.
-
-=item *
-
-L<Compress::Raw::Bzip2> has been upgraded from version 2.063 to 2.064.
-
-Handle non-PVs better.  [cpan #91558]
-
-=item *
-
-L<Compress::Raw::Zlib> has been upgraded from version 2.063 to 2.065.
-
-Handle non-PVs better.  [cpan #91558]
-
-Z_OK instead of Z_BUF_ERROR.  [cpan #92521]
-
-Resolve a C++ build failure in core.  [cpan #92657]
-
-=item *
-
-L<Config::Perl::V> has been upgraded from version 0.19 to 0.20.
-
-Synchronize with blead (bincompat options)
-
-=item *
-
-L<CPAN::Meta::YAML> has been upgraded from version 0.010 to 0.011.
-
-=item *
-
-L<Devel::Peek> has been upgraded from version 1.15 to 1.16.
-
-Devel::Peek::SvREFCNT() now ensures it has been passed a reference, as
-specified by its prototype.
-
-=item *
-
-L<diagnostics> has been upgraded from version 1.33 to 1.34.
-
-=item *
-
-L<Digest::SHA> has been upgraded from version 5.85 to 5.87.
-
-Improved the performance of hexadecimal output functions and simplified capture
-of intermediate SHA states, which can now be done via strings (see
-C<L<getstate()|Digest::SHA/getstate>>/C<L<putstate()|Digest::SHA/putstate($str)>>).
-
-=item *
-
-L<DynaLoader> has been upgraded from version 1.24 to 1.25.
-
-Android support.
-
-=item *
-
-L<English> has been upgraded from version 1.08 to 1.09.
+XXX All changes to installed files in F<cpan/>, F<dist/>, F<ext/> and F<lib/>
+go here.  If Module::CoreList is updated, generate an initial draft of the
+following sections using F<Porting/corelist-perldelta.pl>.  A paragraph summary
+for important changes should then be added by hand.  In an ideal world,
+dual-life modules would have a F<Changes> file that could be cribbed.
 
-Added C<$OLD_PERL_VERSION> as an alias for C<$]>.
+[ Within each section, list entries as a =item entry ]
 
-=item *
-
-L<ExtUtils::CBuilder> has been upgraded from version 0.280213 to 0.280216.
-
-Android support.
-
-=item *
-
-L<ExtUtils::Embed> has been upgraded from version 1.31 to 1.32.
-
-Skip tests when cross-compiling and $Config{cc} isn't available.
-
-=item *
-
-L<ExtUtils::Install> has been upgraded from version 1.61 to 1.62.
-
-Skip tests when cross-compiler and make isn't available.
-
-=item *
-
-L<ExtUtils::MakeMaker> has been upgraded from version 6.86 to 6.88.
+=head2 New Modules and Pragmata
 
-Improved support for Android and other minor changes.
-
-=item *
-
-L<feature> has been upgraded from version 1.34 to 1.35.
-
-=item *
-
-L<File::Fetch> has been upgraded from version 0.46 to 0.48.
-
-Force curl to be IPv4 only during testing on NetBSD.
-
-=item *
-
-L<HTTP::Tiny> has been upgraded from version 0.039 to 0.042.
-
-Added support for keep-alive connections.
-
-If L<IO::Socket::IP> 0.25 or later is available, use that for
-transparent IPv4 or IPv6 support.
-
-=item *
-
-L<inc::latest> has been upgraded from version 0.4204 to 0.4205.
-
-NOTE: L<inc::latest> is deprecated and may be removed from a future version of Perl.
+=over 4
 
 =item *
 
-The IO-Compress module collection has been upgraded from version 2.063
-to 2.064.
+XXX
 
-Android support.
+=back
 
-=item *
+=head2 Updated Modules and Pragmata
 
-L<IO::Socket::IP>, tentatively introduced in L<Perl 5.19.8|perl5198delta>,
-has been upgraded from 0.26 to 0.28.
+=over 4
 
 =item *
 
-L<IPC::Cmd> has been upgraded from version 0.90 to 0.92.
+L<XXX> has been upgraded from version A.xx to B.yy.
 
-=item *
+=back
 
-The libnet module collection has been upgraded from version 1.24 to 1.25.
+=head2 Removed Modules and Pragmata
 
-The creation of L<Net::FTP> dataconnections now honour the requested timeout,
-errors from C<Net::Cmd::response()> are now handled in C<Net::FTP::pasv_wait()>
-and a warning from C<Net::Domain::domainname()> on Android is now stopped.
+=over 4
 
 =item *
 
-L<locale> has been upgraded from version 1.02 to 1.03.
+XXX
 
-Allow C<use locale;> on systems without locales, such as Android.
+=back
 
-=item *
+=head1 Documentation
 
-L<Locale::Codes> has been upgraded from version 3.28 to 3.29.
+XXX Changes to files in F<pod/> go here.  Consider grouping entries by
+file and be sure to link to the appropriate page, e.g. L<perlfunc>.
 
-=item *
+=head2 New Documentation
 
-L<Module::Build> has been upgraded from version 0.4204 to 0.4205.
+XXX Changes which create B<new> files in F<pod/> go here.
 
-Fix license code regression for artistic license.
+=head3 L<XXX>
 
-Don't swallow ExtUtils::CBuilder loading errors.
+XXX Description of the purpose of the new file here
 
-Handle testing on cross-compile builds.
+=head2 Changes to Existing Documentation
 
-Protect against platforms without getpw{nam,uid}.
+XXX Changes which significantly change existing files in F<pod/> go here.
+However, any changes to F<pod/perldiag.pod> should go in the L</Diagnostics>
+section.
 
-=item *
+=head3 L<XXX>
 
-L<Module::CoreList> has been upgraded from version 3.04 to 3.06.
+=over 4
 
 =item *
 
-L<Module::Load> has been upgraded from version 0.28 to 0.30.
-
-Prevent uninitialized warnings during testing.
+XXX Description of the change here
 
-=item *
+=back
 
-L<Module::Load::Conditional> has been upgraded from version 0.60 to 0.62.
+=head1 Diagnostics
 
-=item *
+The following additions or changes have been made to diagnostic output,
+including warnings and fatal error messages.  For the complete list of
+diagnostic messages, see L<perldiag>.
 
-L<mro> has been upgraded from version 1.14 to 1.15.
+XXX New or changed warnings emitted by the core's C<C> code go here.  Also
+include any changes in L<perldiag> that reconcile it to the C<C> code.
 
-Use HEKfARG() instead of creating and throwing away SVs.
+=head2 New Diagnostics
 
-=item *
+XXX Newly added diagnostic messages go under here, separated into New Errors
+and New Warnings
 
-L<Net::Ping> has been upgraded from version 2.42 to 2.43.
+=head3 New Errors
 
-Handle getprotobyname() or getprotobynumber() not being available.
+=over 4
 
 =item *
 
-L<Parse::CPAN::Meta> has been upgraded from version 1.4409 to 1.4413.
-
-Invalid UTF-8 encoding in YAML files are now replaced with "PERLQQ"
-quoting from the Encode module and without warnings.
-
-Removed legacy test modifications for testing with the perl core.
+XXX L<message|perldiag/"message">
 
-=item *
-
-The PathTools module collection has been upgraded from version 3.45 to
-3.46.
+=back
 
-Improved support for Android.
+=head3 New Warnings
 
-C<< File::Spec::Unix->tmpdir >> now consistently returns an absolute
-path, unless in taint mode.  [perl #120593]
+=over 4
 
 =item *
 
-L<Pod::Escapes> has been upgraded from version 1.04 to 1.06.
-
-Now strict and warning clean.  Several minor documentation updates.
-
-e2charnum() no longer treats non-ASCII Unicode digits as suitable for
-an escape.  [cpan #70246]
-
-=item *
+XXX L<message|perldiag/"message">
 
-L<Pod::Parser> has been upgraded from version 1.61 to 1.62.
+=back
 
-=item *
+=head2 Changes to Existing Diagnostics
 
-L<POSIX> has been upgraded from version 1.38_01 to 1.38_02.
+XXX Changes (i.e. rewording) of diagnostic messages go here
 
-Deprecate use of isfoo() functions.
+=over 4
 
 =item *
 
-L<Scalar::Util> has been upgraded from version 1.36 to 1.38.
+XXX Describe change here
 
-A backwards-compatibility issue with older perls has been fixed.  [cpan #92363]
+=back
 
-=item *
+=head1 Utility Changes
 
-L<threads> has been upgraded from version 1.91 to 1.92.
+XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here.
+Most of these are built within the directories F<utils> and F<x2p>.
 
-Synchronization with CPAN release.
+[ List utility changes as a =head3 entry for each utility and =item
+entries for each change
+Use L<XXX> with program names to get proper documentation linking. ]
 
-=item *
+=head3 L<XXX>
 
-L<version> has been upgraded from version 0.9907 to 0.9908.
+=over 4
 
 =item *
 
-L<warnings> has been upgraded from version 1.21 to 1.22.
-
-C<< use warnings "FATAL"; >> now implies C<< "all" >>, and similarly
-for C<< use warnings "NONFATAL" >>.  [perl #120977]
+XXX
 
 =back
 
-=head1 Documentation
-
-=head2 Changes to Existing Documentation
-
-=head3 L<perlfunc>
-
-=over 4
-
-=item *
-
-L<perlfunc/exec>'s handling of arguments is now more clearly
-documented.
+=head1 Configuration and Compilation
 
-=back
+XXX Changes to F<Configure>, F<installperl>, F<installman>, and analogous tools
+go here.  Any other changes to the Perl build process should be listed here.
+However, any platform-specific changes should be listed in the
+L</Platform Support> section, instead.
 
-=head3 L<perlguts>
+[ List changes as a =item entry ].
 
 =over 4
 
 =item *
 
-New sections on L<Read-Only Values|perlguts/"Read-Only Values"> and
-L<Copy on Write|perlguts/"Copy on Write"> have been added.  They were
-actually added in 5.19.8 but accidentally omitted from its delta document.
+XXX
 
 =back
 
-=head1 Diagnostics
-
-The following additions or changes have been made to diagnostic output,
-including warnings and fatal error messages.  For the complete list of
-diagnostic messages, see L<perldiag>.
+=head1 Testing
 
-=head2 New Diagnostics
+XXX Any significant changes to the testing of a freshly built perl should be
+listed here.  Changes which create B<new> files in F<t/> go here as do any
+large changes to the testing harness (e.g. when parallel testing was added).
+Changes to existing files in F<t/> aren't worth summarizing, although the bugs
+that they represent may be covered elsewhere.
 
-=head3 New Errors
+[ List each test improvement as a =item entry ]
 
 =over 4
 
 =item *
 
-Added L<Setting $E<sol> to a %s reference is forbidden|perldiag/"Setting $E<sol> to a %s reference is forbidden">
+XXX
 
 =back
 
-=head3 New Warnings
-
-=over 4
+=head1 Platform Support
 
-=item *
+XXX Any changes to platform support should be listed in the sections below.
 
-Added L<Setting $E<sol> to a reference to %s as a form of slurp is deprecated, treating as undef|perldiag/"Setting $E<sol> to a reference to %s as a form of slurp is deprecated, treating as undef">
+[ Within the sections, list each platform as a =item entry with specific
+changes as paragraphs below it. ]
 
-=back
+=head2 New Platforms
 
-=head1 Configuration and Compilation
+XXX List any platforms that this version of perl compiles on, that previous
+versions did not.  These will either be enabled by new files in the F<hints/>
+directories, or new subdirectories and F<README> files at the top level of the
+source tree.
 
 =over 4
 
-=item *
-
-The cross-compilation model has been renovated.
-There's several new options, and some backwards-incompatible changes:
-
-We now build binaries for miniperl and generate_uudmap to be used on the host, rather than running
-every miniperl call on the target; this means that, short of 'make test',
-we no longer need access to the target system once Configure is done.
-You can provide already-built binaries through the C<hostperl> and
-C<hostgenerate> options to Configure.
-
-Additionally, if targeting an EBCDIC platform from an ASCII host,
-or viceversa, you'll need to run Configure with C<-Uhostgenerate>, to
-indicate that generate_uudmap should be run on the target.
-
-Finally, there's also a way of having Configure end early, right after
-building the host binaries, by cross-compiling without specifying a
-C<targethost>.
-
-The incompatible changes include no longer using xconfig.h, xlib, or
-Cross.pm, so canned config files and Makefiles will have to be updated.
-
-=item *
-
-Related to the above, there is now a way of specifying the location of sh
-(or equivalent) on the target system: C<targetsh>.
+=item XXX-some-platform
 
-For example, Android has its sh in /system/bin/sh, so if cross-compiling
-from a more normal Unixy system with sh in /bin/sh, "targetsh" would end
-up as /system/bin/sh, and "sh" as /bin/sh.
+XXX
 
 =back
 
-=head1 Platform Support
+=head2 Discontinued Platforms
 
-=head2 New Platforms
+XXX List any platforms that this version of perl no longer compiles on.
 
 =over 4
 
-=item Android
+=item XXX-some-platform
 
-Perl can now be built for Android, either natively or through
-cross-compilation, for all three currently available architectures (ARM,
-MIPS, and x86), on a wide range of versions.
+XXX
 
 =back
 
 =head2 Platform-Specific Notes
 
-=over 4
-
-=item VMS
-
-Skip access checks on remotes in opendir().  [perl #121002]
+XXX List any changes for specific platforms.  This could include configuration
+and compilation changes or changes in portability/compatibility.  However,
+changes within modules for platforms should generally be listed in the
+L</Modules and Pragmata> section.
 
-=item Cygwin
+=over 4
 
-Fixed a build error in cygwin.c on Cygwin 1.7.28.
+=item XXX-some-platform
 
-Tests now handle the errors that occur when C<cygserver> isn't
-running.
+XXX
 
 =back
 
 =head1 Internal Changes
 
-=over 4
-
-=item Regexp Engine Changes That Affect The Pluggable Regex Engine Interface
-
-Many flags that used to be exposed via regexp.h and used to populate the
-extflags member of struct regexp have been removed. These fields were
-technically private to Perl's own regexp engine and should not have been
-exposed there in the first place.
-
-The affected flags are:
-
-    RXf_NOSCAN
-    RXf_CANY_SEEN
-    RXf_GPOS_SEEN
-    RXf_GPOS_FLOAT
-    RXf_ANCH_BOL
-    RXf_ANCH_MBOL
-    RXf_ANCH_SBOL
-    RXf_ANCH_GPOS
-
-As well as the follow flag masks:
-
-    RXf_ANCH_SINGLE
-    RXf_ANCH
-
-All have been renamed to PREGf_ equivalents and moved to regcomp.h.
-
-The behavior previously achieved by setting one or more of the RXf_ANCH_
-flags (via the RXf_ANCH mask) have now been replaced by a *single* flag bit
-in extflags:
+XXX Changes which affect the interface available to C<XS> code go here.  Other
+significant internal changes for future core maintainers should be noted as
+well.
 
-    RXf_IS_ANCHORED
-
-pluggable regex engines which previously used to set these flags should
-now set this flag ALONE.
-
-=back
-
-=head1 Selected Bug Fixes
+[ List each change as a =item entry ]
 
 =over 4
 
 =item *
 
-Backticks (C< `` > or C< qx// >) combined with multiple threads on
-Win32 could result in output sent to stdout on one thread being
-captured by backticks of an external command in another thread.
-
-This could occur for pseudo-forked processes too, as Win32's
-pseudo-fork is implemented in terms of threads.  [perl #77672]
-
-=item *
-
-C<< open $fh, ">+", undef >> no longer leaks memory when TMPDIR is set
-but points to a directory a temporary file cannot be created in.  [perl
-#120951]
-
-=item *
-
-C<$^R> wasn't available outside of the regular expression that
-initialized it.  [perl #121070]
-
-=item *
-
-Fixed a regular expression bug introduced in 5.19.5 where \S, \W etc
-could fail for above ASCII.  [perl #121144]
-
-=item *
-
-A large set of fixes and refactoring for re_intuit_start() was merged,
-the highlights are:
-
-=over
-
-=item *
-
-Fixed a panic when compiling the regular expression
-C</\x{100}[xy]\x{100}{2}/>.
-
-=item *
-
-Fixed a performance regression when performing a global pattern match
-against a UTF-8 string.  [perl #120692]
-
-=item *
-
-Fixed another performance issue where matching a regular expression
-like C</ab.{1,2}x/> against a long UTF-8 string would unnecessarily
-calculate byte offsets for a large portion of the string. [perl
-#120692]
+XXX
 
 =back
 
-=item *
-
-C< for ( $h{k} || '' ) > no longer auto-vivifies C<$h{k}>.  [perl
-#120374]
-
-=item *
-
-On Windows machines, Perl now emulates the POSIX use of the environment
-for locale initialization.  Previously, the environment was ignored.
-See L<perllocale/ENVIRONMENT>.
-
-=item *
+=head1 Selected Bug Fixes
 
-Fixed a crash when destroying a self-referencing GLOB.  [perl #121242]
+XXX Important bug fixes in the core language are summarized here.  Bug fixes in
+files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
 
-=item *
+[ List each fix as a =item entry ]
 
-Call set-magic when setting $DB::sub.  [perl #121255]
+=over 4
 
 =item *
 
-Fixed an alignment error when compiling regular expressions when built
-with GCC on HP-UX 64-bit.
+XXX
 
 =back
 
 =head1 Known Problems
 
+XXX Descriptions of platform agnostic bugs we know we can't fix go here.  Any
+tests that had to be C<TODO>ed for the release would be noted here.  Unfixed
+platform specific bugs also go here.
+
+[ List each fix as a =item entry ]
+
 =over 4
 
 =item *
 
-The F<lib/locale.t> test may fail rarely.
+XXX
 
 =back
 
@@ -699,49 +362,23 @@ The F<lib/locale.t> test may fail rarely.
 
 =over 4
 
-=item perl5180delta.pod
+=item *
 
-This pod file contains a statement saying that C<RXf_SPLIT> (and its alias
-C<RXf_PMf_SPLIT>) and C<RXf_SKIPWHITE> were no longer used and #defined
-to 0. This was the case for a short period, but the change was reverted
-before Perl 5.18 was released. As such it was not true in Perl 5.18.x,
-and is also not true now. Both flags continue to be used. The incorrect
-entry has been removed from C<perl5180delta.pod> in this release.
+XXX Add anything here that we forgot to add, or were mistaken about, in
+the perldelta of a previous release.
 
 =back
 
-=head1 Acknowledgements
-
-Perl 5.19.9 represents approximately 4 weeks of development since Perl 5.19.8
-and contains approximately 47,000 lines of changes across 610 files from 32
-authors.
+=head1 Obituary
 
-Excluding auto-generated files, documentation and release tools, there were
-approximately 34,000 lines of changes to 420 .pm, .t, .c and .h files.
+XXX If any significant core contributor has died, we've added a short obituary
+here.
 
-Perl continues to flourish into its third decade thanks to a vibrant community
-of users and developers. The following people are known to have contributed the
-improvements that became Perl 5.19.9:
-
-Abigail, Alan Haggai Alavi, Brad Gilbert, Brian Fraser, Chris 'BinGOs'
-Williams, Craig A. Berry, Daniel Dragan, David Golden, David Mitchell, Father
-Chrysostomos, Gavin Shelley, H.Merijn Brand, Hauke D, James E Keenan, Jerry D.
-Hedden, Jess Robinson, John Peacock, Karl Williamson, Matthew Horsfall, Neil
-Williams, Peter Martini, Piotr Roszatycki, Rafael Garcia-Suarez, Reini Urban,
-Ricardo Signes, Steffen Müller, Steve Hay, Sullivan Beck, Tom Hukins, Tony
-Cook, Yves Orton, Zefram.
-
-The list above is almost certainly incomplete as it is automatically generated
-from version control history. In particular, it does not include the names of
-the (very much appreciated) contributors who reported issues to the Perl bug
-tracker.
+=head1 Acknowledgements
 
-Many of the changes included in this version originated in the CPAN modules
-included in Perl's core. We're grateful to the entire CPAN community for
-helping Perl to flourish.
+XXX Generate this with:
 
-For a more complete list of all of Perl's historical contributors, please see
-the F<AUTHORS> file in the Perl source distribution.
+  perl Porting/acknowledgements.pl v5.19.9..HEAD
 
 =head1 Reporting Bugs