perldelta for the 79881ad71252 merge

[perl5.git] / pod / perldelta.pod

diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 76f4972..ee4944c 100644 (file)
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -27,6 +27,24 @@ here, but most should go in the L</Performance Enhancements> section.
 
 [ List each enhancement as a =head2 entry ]
 
+=head2 Perl can now do default collation in UTF-8 locales on platforms
+that support it
+
+Some platforms natively do a reasonable job of collating and sorting in
+UTF-8 locales.  Perl now works with those.  For portability and full
+control, L<Unicode::Collate> is still recommended, but now you may
+not need to do anything special to get good-enough results, depending on
+your application.  See
+L<perllocale/Category C<LC_COLLATE>: Collation: Text Comparisons and Sorting>
+
+=head2 Better locale collation of strings containing embedded C<NUL>
+characters
+
+In locales that have multi-level character weights, these are now
+ignored at the higher priority ones.  There are still some gotchas in
+some strings, though.  See
+L<perllocale/Collation of strings containing embedded C<NUL> characters>.
+
 =head1 Security
 
 XXX Any security-related notices go here.  In particular, any security
@@ -35,6 +53,25 @@ L</Selected Bug Fixes> section.
 
 [ List each security issue as a =head2 entry ]
 
+=head2 C<-Di> switch is now required for PerlIO debugging output
+
+Previously PerlIO debugging output would be sent to the file specified
+by the C<PERLIO_DEBUG> environment variable if perl wasn't running
+setuid and the C<-T> or C<-t> switches hadn't been parsed yet.
+
+If perl performed output at a point where it hadn't yet parsed its
+switches this could result in perl creating or overwriting the file
+named by C<PERLIO_DEBUG> even when the C<-T> switch had been supplied.
+
+Perl now requires the C<-Di> switch to produce PerlIO debugging
+output.  By default this is written to C<stderr>, but can optionally
+be redirected to a file by setting the C<PERLIO_DEBUG> environment
+variable.
+
+If perl is running setuid or the C<-T> switch has supplied
+C<PERLIO_DEBUG> is ignored and the debugging output is sent to
+C<stderr> as for any other C<-D> switch.
+
 =head1 Incompatible Changes
 
 XXX For a release on a stable branch, this section aspires to be:
@@ -186,7 +223,7 @@ and New Warnings
 
 =item *
 
-L<Version control conflict marker '%s'|perldiag/"Version control conflict marker '%s'">
+L<Version control conflict marker|perldiag/"Version control conflict marker">
 
 =item *
 
@@ -331,7 +368,8 @@ well.
 
 =item *
 
-XXX
+Perl no longer panics when switching into some locales on machines with
+buggy C<strxfrm()> implementations in their libc. [perl #121734]
 
 =back
 
@@ -346,7 +384,8 @@ files in F<ext/> and F<lib/> are best summarized in L</Modules and Pragmata>.
 
 =item *
 
-XXX
+C< until ($x = 1) { ... } > and C< ... until $x = 1 > now properly
+warn when syntax warnings are enabled.  [perl #127333]
 
 =back