In perl.git, the branch maint-5.28 has been updated <https://perl5.git.perl.org/perl.git/commitdiff/94027dc85b896cfea4bd017b273f22e472882d68?hp=7346c5fcf961df288bd249d2f150ab6f0e40a3ee>
- Log ----------------------------------------------------------------- commit 94027dc85b896cfea4bd017b273f22e472882d68 Author: Steve Hay <steve.m....@googlemail.com> Date: Sun Nov 4 22:12:12 2018 +0000 Fix-ups to previous cherry-pick (For blead this was done in b0394755dd.) commit 9d1ba25688d286786d0994b12f4a84b76cfdcf36 Author: Sawyer X <xsawy...@cpan.org> Date: Fri Jun 22 20:19:08 2018 -0600 Add per5280delta.pod to MANIFEST (cherry picked from commit 8a466a496bec7250920063d8f0eb252b0d962c08) ----------------------------------------------------------------------- Summary of changes: MANIFEST | 1 + Makefile.SH | 8 +- pod/.gitignore | 2 +- pod/perl.pod | 1 + pod/{perldelta.pod => perl5280delta.pod} | 2 +- pod/perldelta.pod | 2398 +++--------------------------- vms/descrip_mms.template | 2 +- win32/GNUmakefile | 4 +- win32/Makefile | 4 +- win32/makefile.mk | 4 +- win32/pod.mak | 4 + 11 files changed, 221 insertions(+), 2209 deletions(-) copy pod/{perldelta.pod => perl5280delta.pod} (99%) diff --git a/MANIFEST b/MANIFEST index 2005f544cd..fcf3455b2e 100644 --- a/MANIFEST +++ b/MANIFEST @@ -5068,6 +5068,7 @@ pod/perl5244delta.pod Perl changes in version 5.24.4 pod/perl5260delta.pod Perl changes in version 5.26.0 pod/perl5261delta.pod Perl changes in version 5.26.1 pod/perl5262delta.pod Perl changes in version 5.26.2 +pod/perl5280delta.pod Perl changes in version 5.28.0 pod/perl561delta.pod Perl changes in version 5.6.1 pod/perl56delta.pod Perl changes in version 5.6 pod/perl581delta.pod Perl changes in version 5.8.1 diff --git a/Makefile.SH b/Makefile.SH index 123903dcb0..5197009290 100755 --- a/Makefile.SH +++ b/Makefile.SH @@ -575,7 +575,7 @@ esac $spitshell >>$Makefile <<'!NO!SUBS!' -perltoc_pod_prereqs = extra.pods pod/perl5280delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod +perltoc_pod_prereqs = extra.pods pod/perl5281delta.pod pod/perlapi.pod pod/perlintern.pod pod/perlmodlib.pod pod/perluniprops.pod generated_pods = pod/perltoc.pod $(perltoc_pod_prereqs) generated_headers = uudmap.h bitcount.h mg_data.h @@ -1125,9 +1125,9 @@ pod/perlintern.pod: $(MINIPERL_EXE) autodoc.pl embed.fnc pod/perlmodlib.pod: $(MINIPERL_EXE) pod/perlmodlib.PL MANIFEST $(MINIPERL) pod/perlmodlib.PL -q -pod/perl5280delta.pod: pod/perldelta.pod - $(RMS) pod/perl5280delta.pod - $(LNS) perldelta.pod pod/perl5280delta.pod +pod/perl5281delta.pod: pod/perldelta.pod + $(RMS) pod/perl5281delta.pod + $(LNS) perldelta.pod pod/perl5281delta.pod extra.pods: $(MINIPERL_EXE) -@test ! -f extra.pods || rm -f `cat extra.pods` diff --git a/pod/.gitignore b/pod/.gitignore index 8974e374d6..26160694da 100644 --- a/pod/.gitignore +++ b/pod/.gitignore @@ -50,7 +50,7 @@ /roffitall # generated -/perl5280delta.pod +/perl5281delta.pod /perlapi.pod /perlintern.pod /perlmodlib.pod diff --git a/pod/perl.pod b/pod/perl.pod index 15c6b4427d..fbbb952b6b 100644 --- a/pod/perl.pod +++ b/pod/perl.pod @@ -181,6 +181,7 @@ aux h2ph h2xs perlbug pl2pm pod2html pod2man splain xsubpp perlhist Perl history records perldelta Perl changes since previous version + perl5280delta Perl changes in version 5.28.0 perl5262delta Perl changes in version 5.26.2 perl5261delta Perl changes in version 5.26.1 perl5260delta Perl changes in version 5.26.0 diff --git a/pod/perldelta.pod b/pod/perl5280delta.pod similarity index 99% copy from pod/perldelta.pod copy to pod/perl5280delta.pod index f823fbf6a6..0ecd260ca5 100644 --- a/pod/perldelta.pod +++ b/pod/perl5280delta.pod @@ -2,7 +2,7 @@ =head1 NAME -perldelta - what is new for perl v5.28.0 +perl5280delta - what is new for perl v5.28.0 =head1 DESCRIPTION diff --git a/pod/perldelta.pod b/pod/perldelta.pod index f823fbf6a6..d5ebc3ab1d 100644 --- a/pod/perldelta.pod +++ b/pod/perldelta.pod @@ -2,423 +2,57 @@ =head1 NAME -perldelta - what is new for perl v5.28.0 +[ 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 v5.28.1 =head1 DESCRIPTION -This document describes differences between the 5.26.0 release and the 5.28.0 +This document describes differences between the 5.28.0 release and the 5.28.1 release. -If you are upgrading from an earlier release such as 5.24.0, first read -L<perl5260delta>, which describes differences between 5.24.0 and 5.26.0. - -=head1 Core Enhancements - -=head2 Unicode 10.0 is supported - -A list of changes is at -L<http://www.unicode.org/versions/Unicode10.0.0>. - -=head2 L<C<delete>|perlfunc/delete EXPR> on key/value hash slices - -L<C<delete>|perlfunc/delete EXPR> can now be used on -L<keyE<sol>value hash slices|perldata/KeyE<sol>Value Hash Slices>, -returning the keys along with the deleted values. -L<[perl #131328]|https://rt.perl.org/Ticket/Display.html?id=131328> - -=head2 Experimentally, there are now alphabetic synonyms for some regular expression assertions - -If you find it difficult to remember how to write certain of the pattern -assertions, there are now alphabetic synonyms. - - CURRENT NEW SYNONYMS - ------ ------------ - (?=...) (*pla:...) or (*positive_lookahead:...) - (?!...) (*nla:...) or (*negative_lookahead:...) - (?<=...) (*plb:...) or (*positive_lookbehind:...) - (?<!...) (*nlb:...) or (*negative_lookbehind:...) - (?>...) (*atomic:...) - -These are considered experimental, so using any of these will raise -(unless turned off) a warning in the C<experimental::alpha_assertions> -category. - -=head2 Mixed Unicode scripts are now detectable - -A mixture of scripts, such as Cyrillic and Latin, in a string is often -the sign of a spoofing attack. A new regular expression construct -now allows for easy detection of these. For example, you can say - - qr/(*script_run: \d+ \b )/x - -And the digits matched will all be from the same set of 10. You won't -get a look-alike digit from a different script that has a different -value than what it appears to be. - -Or: - - qr/(*sr: \b \w+ \b )/x - -makes sure that all the characters come from the same script. - -You can also combine script runs with C<(?E<gt>...)> (or -C<*atomic:...)>). - -Instead of writing: - - (*sr:(?<...)) - -you can now run: - - (*asr:...) - # or - (*atomic_script_run:...) - -This is considered experimental, so using it will raise (unless turned -off) a warning in the C<experimental::script_run> category. - -See L<perlre/Script Runs>. - -=head2 In-place editing with C<perl -i> is now safer - -Previously in-place editing (C<perl -i>) would delete or rename the -input file as soon as you started working on a new file. - -Without backups this would result in loss of data if there was an -error, such as a full disk, when writing to the output file. - -This has changed so that the input file isn't replaced until the -output file has been completely written and successfully closed. - -This works by creating a work file in the same directory, which is -renamed over the input file once the output file is complete. - -Incompatibilities: - -=over - -=item * - -Since this renaming needs to only happen once, if you create a thread -or child process, that renaming will only happen in the original -thread or process. - -=item * - -If you change directories while processing a file, and your operating -system doesn't provide the C<unlinkat()>, C<renameat()> and C<fchmodat()> -functions, the final rename step may fail. - -=back - -L<[perl #127663]|https://rt.perl.org/Public/Bug/Display.html?id=127663> - -=head2 Initialisation of aggregate state variables - -A persistent lexical array or hash variable can now be initialized, -by an expression such as C<state @a = qw(x y z)>. Initialization of a -list of persistent lexical variables is still not possible. - -=head2 Full-size inode numbers - -On platforms where inode numbers are of a type larger than perl's native -integer numerical types, L<stat|perlfunc/stat> will preserve the full -content of large inode numbers by returning them in the form of strings of -decimal digits. Exact comparison of inode numbers can thus be achieved by -comparing with C<eq> rather than C<==>. Comparison with C<==>, and other -numerical operations (which are usually meaningless on inode numbers), -work as well as they did before, which is to say they fall back to -floating point, and ultimately operate on a fairly useless rounded inode -number if the real inode number is too big for the floating point format. - -=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. +If you are upgrading from an earlier release such as 5.27.0, first read +L<perl5280delta>, which describes differences between 5.27.0 and 5.28.0. -=head2 Close-on-exec flag set atomically +=head1 Notice -When opening a file descriptor, perl now generally opens it with its -close-on-exec flag already set, on platforms that support doing so. -This improves thread safety, because it means that an C<exec> initiated -by one thread can no longer cause a file descriptor in the process -of being opened by another thread to be accidentally passed to the -executed program. +XXX Any important notices here -Additionally, perl now sets the close-on-exec flag more reliably, whether -it does so atomically or not. Most file descriptors were getting the -flag set, but some were being missed. - -=head2 String- and number-specific bitwise ops are no longer experimental - -The new string-specific (C<&. |. ^. ~.>) and number-specific (C<& | ^ ~>) -bitwise operators introduced in Perl 5.22 that are available within the -scope of C<use feature 'bitwise'> are no longer experimental. -Because the number-specific ops are spelled the same way as the existing -operators that choose their behaviour based on their operands, these -operators must still be enabled via the "bitwise" feature, in either of -these two ways: - - use feature "bitwise"; - - use v5.28; # "bitwise" now included - -They are also now enabled by the B<-E> command-line switch. - -The "bitwise" feature no longer emits a warning. Existing code that -disables the "experimental::bitwise" warning category that the feature -previously used will continue to work. - -One caveat that module authors ought to be aware of is that the numeric -operators now pass a fifth TRUE argument to overload methods. Any methods -that check the number of operands may croak if they do not expect so many. -XS authors in particular should be aware that this: - - SV * - bitop_handler (lobj, robj, swap) - -may need to be changed to this: - - SV * - bitop_handler (lobj, robj, swap, ...) - -=head2 Locales are now thread-safe on systems that support them - -These systems include Windows starting with Visual Studio 2005, and in -POSIX 2008 systems. - -The implication is that you are now free to use locales and change them -in a threaded environment. Your changes affect only your thread. -See L<perllocale/Multi-threaded operation> +=head1 Core Enhancements -=head2 New read-only predefined variable C<${^SAFE_LOCALES}> +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. -This variable is 1 if the Perl interpreter is operating in an -environment where it is safe to use and change locales (see -L<perllocale>.) This variable is true when the perl is -unthreaded, or compiled in a platform that supports thread-safe locale -operation (see previous item). +[ List each enhancement as a =head2 entry ] =head1 Security -=head2 [CVE-2017-12837] Heap buffer overflow in regular expression compiler - -Compiling certain regular expression patterns with the case-insensitive -modifier could cause a heap buffer overflow and crash perl. This has now been -fixed. -L<[perl #131582]|https://rt.perl.org/Public/Bug/Display.html?id=131582> - -=head2 [CVE-2017-12883] Buffer over-read in regular expression parser +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. -For certain types of syntax error in a regular expression pattern, the error -message could either contain the contents of a random, possibly large, chunk of -memory, or could crash perl. This has now been fixed. -L<[perl #131598]|https://rt.perl.org/Public/Bug/Display.html?id=131598> - -=head2 [CVE-2017-12814] C<$ENV{$key}> stack buffer overflow on Windows - -A possible stack buffer overflow in the C<%ENV> code on Windows has been fixed -by removing the buffer completely since it was superfluous anyway. -L<[perl #131665]|https://rt.perl.org/Public/Bug/Display.html?id=131665> - -=head2 Default Hash Function Change - -Perl 5.28.0 retires various older hash functions which are not viewed as -sufficiently secure for use in Perl. We now support four general purpose -hash functions, Siphash (2-4 and 1-3 variants), and Zaphod32, and StadtX -hash. In addition we support SBOX32 (a form of tabular hashing) for hashing -short strings, in conjunction with any of the other hash functions provided. - -By default Perl is configured to support SBOX hashing of strings up to 24 -characters, in conjunction with StadtX hashing on 64 bit builds, and -Zaphod32 hashing for 32 bit builds. - -You may control these settings with the following options to Configure: - - -DPERL_HASH_FUNC_SIPHASH - -DPERL_HASH_FUNC_SIPHASH13 - -DPERL_HASH_FUNC_STADTX - -DPERL_HASH_FUNC_ZAPHOD32 - -To disable SBOX hashing you can use - - -DPERL_HASH_USE_SBOX32_ALSO=0 - -And to set the maximum length to use SBOX32 hashing on with: - - -DSBOX32_MAX_LEN=16 - -The maximum length allowed is 256. There probably isn't much point -in setting it higher than the default. +[ List each security issue as a =head2 entry ] =head1 Incompatible Changes -=head2 Subroutine attribute and signature order - -The experimental subroutine signatures feature has been changed so that -subroutine attributes must now come before the signature rather than -after. This is because attributes like C<:lvalue> can affect the -compilation of code within the signature, for example: - - sub f :lvalue ($a = do { $x = "abc"; return substr($x,0,1)}) { ...} - -Note that this the second time they have been flipped: - - sub f :lvalue ($a, $b) { ... }; # 5.20; 5.28 onwards - sub f ($a, $b) :lvalue { ... }; # 5.22 - 5.26 - -=head2 Comma-less variable lists in formats are no longer allowed - -Omitting the commas between variables passed to formats is no longer -allowed. This has been deprecated since Perl 5.000. - -=head2 The C<:locked> and C<:unique> attributes have been removed - -These have been no-ops and deprecated since Perl 5.12 and 5.10, -respectively. - -=head2 C<\N{}> with nothing between the braces is now illegal - -This has been deprecated since Perl 5.24. - -=head2 Opening the same symbol as both a file and directory handle is no longer allowed - -Using C<open()> and C<opendir()> to associate both a filehandle and a dirhandle -to the same symbol (glob or scalar) has been deprecated since Perl 5.10. - -=head2 Use of bare C<< << >> to mean C<< <<"" >> is no longer allowed - -Use of a bare terminator has been deprecated since Perl 5.000. - -=head2 Setting $/ to a reference to a non-positive integer no longer allowed - -This used to work like setting it to C<undef>, but has been deprecated -since Perl 5.20. - -=head2 Unicode code points with values exceeding C<IV_MAX> are now fatal - -This was deprecated since Perl 5.24. - -=head2 The C<B::OP::terse> method has been removed - -Use C<B::Concise::b_terse> instead. +XXX For a release on a stable branch, this section aspires to be: -=head2 Use of inherited AUTOLOAD for non-methods is no longer allowed + There are no changes intentionally incompatible with 5.XXX.XXX + If any exist, they are bugs, and we request that you submit a + report. See L</Reporting Bugs> below. -This was deprecated in Perl 5.004. - -=head2 Use of strings with code points over 0xFF is not allowed for bitwise string operators - -Code points over C<0xFF> do not make sense for bitwise operators and such -an operation will now croak, except for a few remaining cases. See -L<perldeprecation>. - -This was deprecated in Perl 5.24. - -=head2 Setting C<${^ENCODING}> to a defined value is now illegal - -This has been deprecated since Perl 5.22 and a no-op since Perl 5.26. - -=head2 Backslash no longer escapes colon in PATH for the C<-S> switch - -Previously the C<-S> switch incorrectly treated backslash ("\") as an -escape for colon when traversing the C<PATH> environment variable. -L<[perl #129183]|https://rt.perl.org/Ticket/Display.html?id=129183> - -=head2 the -DH (DEBUG_H) misfeature has been removed - -On a perl built with debugging support, the C<H> flag to the C<-D> -debugging option has been removed. This was supposed to dump hash values, -but has been broken for many years. - -=head2 Yada-yada is now strictly a statement - -By the time of its initial stable release in Perl 5.12, the C<...> -(yada-yada) operator was explicitly intended to serve as a statement, -not an expression. However, the original implementation was confused -on this point, leading to inconsistent parsing. The operator was -accidentally accepted in a few situations where it did not serve as a -complete statement, such as - - ... . "foo"; - ... if $a < $b; - -The parsing has now been made consistent, permitting yada-yada only as -a statement. Affected code can use C<do{...}> to put a yada-yada into -an arbitrary expression context. - -=head2 Sort algorithm can no longer be specified - -Since Perl 5.8, the L<sort> pragma has had subpragmata C<_mergesort>, -C<_quicksort>, and C<_qsort> that can be used to specify which algorithm -perl should use to implement the L<sort|perlfunc/sort> builtin. -This was always considered a dubious feature that might not last, -hence the underscore spellings, and they were documented as not being -portable beyond Perl 5.8. These subpragmata have now been deleted, -and any attempt to use them is an error. The L<sort> pragma otherwise -remains, and the algorithm-neutral C<stable> subpragma can be used to -control sorting behaviour. -L<[perl #119635]|https://rt.perl.org/Ticket/Display.html?id=119635> - -=head2 Over-radix digits in floating point literals - -Octal and binary floating point literals used to permit any hexadecimal -digit to appear after the radix point. The digits are now restricted -to those appropriate for the radix, as digits before the radix point -always were. - -=head2 Return type of C<unpackstring()> - -The return types of the C API functions C<unpackstring()> and -C<unpack_str()> have changed from C<I32> to C<SSize_t>, in order to -accommodate datasets of more than two billion items. +[ List each incompatible change as a =head2 entry ] =head1 Deprecations -=head2 Use of L<C<vec>|perlfunc/vec EXPR,OFFSET,BITS> on strings with code points above 0xFF is deprecated - -Such strings are represented internally in UTF-8, and C<vec> is a -bit-oriented operation that will likely give unexpected results on those -strings. - -=head2 Some uses of unescaped C<"{"> in regexes are no longer fatal - -Perl 5.26.0 fatalized some uses of an unescaped left brace, but an -exception was made at the last minute, specifically crafted to be a -minimal change to allow GNU Autoconf to work. That tool is heavily -depended upon, and continues to use the deprecated usage. Its use of an -unescaped left brace is one where we have no intention of repurposing -C<"{"> to be something other than itself. - -That exception is now generalized to include various other such cases -where the C<"{"> will not be repurposed. - -Note that these uses continue to raise a deprecation message. - -=head2 Use of unescaped C<"{"> immediately after a C<"("> in regular expression patterns is deprecated - -Using unescaped left braces is officially deprecated everywhere, but it -is not enforced in contexts where their use does not interfere with -expected extensions to the language. A deprecation is added in this -release when the brace appears immediately after an opening parenthesis. -Before this, even if the brace was part of a legal quantifier, it was -not interpreted as such, but as the literal characters, unlike other -quantifiers that follow a C<"("> which are considered errors. Now, -their use will raise a deprecation message, unless turned off. - -=head2 Assignment to C<$[> will be fatal in Perl 5.30 - -Assigning a non-zero value to L<C<$[>|perlvar/$[> has been deprecated -since Perl 5.12, but was never given a deadline for removal. This has -now been scheduled for Perl 5.30. - -=head2 hostname() won't accept arguments in Perl 5.32 - -Passing arguments to C<Sys::Hostname::hostname()> was already deprecated, -but didn't have a removal date. This has now been scheduled for Perl -5.32. L<[perl #124349]|https://rt.perl.org/Ticket/Display.html?id=124349> +XXX Any deprecated features, syntax, modules etc. should be listed here. =head2 Module removals +XXX Remove this section if not applicable. + 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 @@ -435,1969 +69,341 @@ not usually on concerns over their design. =over -=item B::Debug +=item XXX -=item L<Locale::Codes> and its associated Country, Currency and Language modules +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. =back -=head1 Performance Enhancements - -=over 4 - -=item * - -The start up overhead for creating regular expression patterns with -Unicode properties (C<\p{...}>) has been greatly reduced in most cases. - -=item * - -Many string concatenation expressions are now considerably faster, due -to the introduction internally of a C<multiconcat> opcode which combines -multiple concatenations, and optionally a C<=> or C<.=>, into a single -action. For example, apart from retrieving C<$s>, C<$a> and C<$b>, this -whole expression is now handled as a single op: +[ List each other deprecation as a =head2 entry ] - $s .= "a=$a b=$b\n" - -As a special case, if the LHS of an assignment is a lexical variable or -C<my $s>, the op itself handles retrieving the lexical variable, which -is faster. - -In general, the more the expression includes a mix of constant strings and -variable expressions, the longer the expression, and the more it mixes -together non-utf8 and utf8 strings, the more marked the performance -improvement. For example on a C<x86_64> system, this code has been -benchmarked running four times faster: - - my $s; - my $a = "ab\x{100}cde"; - my $b = "fghij"; - my $c = "\x{101}klmn"; - - for my $i (1..10_000_000) { - $s = "\x{100}wxyz"; - $s .= "foo=$a bar=$b baz=$c"; - } +=head1 Performance Enhancements -In addition, C<sprintf> expressions which have a constant format -containing only C<%s> and C<%%> format elements, and which have a fixed -number of arguments, are now also optimised into a C<multiconcat> op. +XXX Changes which enhance performance without changing behaviour go here. +There may well be none in a stable release. -=item * +[ List each enhancement as an =item entry ] -The C<ref()> builtin is now much faster in boolean context, since it no -longer bothers to construct a temporary string like C<Foo=ARRAY(0x134af48)>. +=over 4 =item * -C<keys()> in void and scalar contexts is now more efficient. +XXX -=item * +=back -The common idiom of comparing the result of index() with -1 is now -specifically optimised, e.g. +=head1 Modules and Pragmata - if (index(...) != -1) { ... } +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. -=item * +The list of new and updated modules is modified automatically as part of +preparing a Perl release, so the only reason to manually add entries here is if +you're summarising the important changes in the module update. (Also, if the +manually-added details don't match the automatically-generated ones, the +release manager will have to investigate the situation carefully.) -C<for()> loops and similar constructs are now more efficient in most cases. +[ Within each section, list entries as an =item entry ] -=item * +=head2 New Modules and Pragmata -L<File::Glob> has been modified to remove unnecessary backtracking and -recursion, thanks to Russ Cox. See L<https://research.swtch.com/glob> -for more details. +=over 4 =item * -The XS-level C<SvTRUE()> API function is now more efficient. - -=item * +XXX Remove this section if not applicable. -Various integer-returning ops are now more efficient in scalar/boolean context. +=back -=item * +=head2 Updated Modules and Pragmata -Slightly improved performance when parsing stash names. -L<[perl #129990]|https://rt.perl.org/Public/Bug/Display.html?id=129990> +=over 4 =item * -Calls to C<require> for an already loaded module are now slightly faster. -L<[perl #132171]|https://rt.perl.org/Public/Bug/Display.html?id=132171> +L<XXX> has been upgraded from version A.xx to B.yy. -=item * +If there was something important to note about this change, include that here. -The performance of pattern matching C<[[:ascii:]]> and C<[[:^ascii:]]> -has been improved significantly except on EBCDIC platforms. +=back -=item * +=head2 Removed Modules and Pragmata -Various optimizations have been applied to matching regular expression -patterns, so under the right circumstances, significant performance -gains may be noticed. But in an application with many varied patterns, -little overall improvement likely will be seen. +=over 4 =item * -Other optimizations have been applied to UTF-8 handling, but these are -not typically a major factor in most applications. +XXX =back -=head1 Modules and Pragmata +=head1 Documentation -Key highlights in this release across several modules: +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>. -=head2 Removal of use vars +=head2 New Documentation -The usage of C<use vars> has been discouraged since the introduction of -C<our> in Perl 5.6.0. Where possible the usage of this pragma has now been -removed from the Perl source code. +XXX Changes which create B<new> files in F<pod/> go here. -This had a slight effect (for the better) on the output of WARNING_BITS in -L<B::Deparse>. +=head3 L<XXX> -=head2 Use of DynaLoader changed to XSLoader in many modules +XXX Description of the purpose of the new file here -XSLoader is more modern, and most modules already require perl 5.6 or -greater, so no functionality is lost by switching. In some cases, we have -also made changes to the local implementation that may not be reflected in -the version on CPAN due to a desire to maintain more backwards -compatibility. +=head2 Changes to Existing Documentation -=head2 Updated Modules and Pragmata +We have attempted to update the documentation to reflect the changes +listed in this document. If you find any we have missed, send email +to L<perl...@perl.org|mailto:perl...@perl.org>. -=over 4 +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 * +Additionally, the following selected changes have been made: -L<Archive::Tar> has been upgraded from version 2.24 to 2.30. +=head3 L<XXX> -This update also handled CVE-2018-12015: directory traversal -vulnerability. -L<[cpan #125523]|https://rt.cpan.org/Ticket/Display.html?id=125523> +=over 4 =item * -L<arybase> has been upgraded from version 0.12 to 0.15. +XXX Description of the change here -=item * +=back -L<Attribute::Handlers> has been upgraded from version 0.99 to 1.01. +=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<attributes> has been upgraded from version 0.29 to 0.33. +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. -=item * +=head2 New Diagnostics -L<B> has been upgraded from version 1.68 to 1.74. +XXX Newly added diagnostic messages go under here, separated into New Errors +and New Warnings -=item * +=head3 New Errors -L<B::Concise> has been upgraded from version 0.999 to 1.003. +=over 4 =item * -L<B::Debug> has been upgraded from version 1.24 to 1.26. - -NOTE: L<B::Debug> is deprecated and may be removed from a future version -of Perl. +XXX L<message|perldiag/"message"> -=item * - -L<B::Deparse> has been upgraded from version 1.40 to 1.48. +=back -It includes many bug fixes, and in particular, it now deparses variable -attributes correctly: +=head3 New Warnings - my $x :foo; # used to deparse as - # 'attributes'->import('main', \$x, 'foo'), my $x; +=over 4 =item * -L<base> has been upgraded from version 2.25 to 2.27. +XXX L<message|perldiag/"message"> -=item * +=back -L<bignum> has been upgraded from version 0.47 to 0.49. +=head2 Changes to Existing Diagnostics -=item * +XXX Changes (i.e. rewording) of diagnostic messages go here -L<blib> has been upgraded from version 1.06 to 1.07. +=over 4 =item * -L<bytes> has been upgraded from version 1.05 to 1.06. +XXX Describe change here -=item * +=back -L<Carp> has been upgraded from version 1.42 to 1.50. +=head1 Utility Changes -If a package on the call stack contains a constant named C<ISA>, Carp no -longer throws a "Not a GLOB reference" error. +XXX Changes to installed programs such as F<perlbug> and F<xsubpp> go here. +Most of these are built within the directory F<utils>. -L<Carp>, when generating stack traces, now attempts to work around -longstanding bugs resulting from Perl's non-reference-counted stack. -L<[perl #52610]|https://rt.perl.org/Ticket/Display.html?id=52610> +[ List utility changes as a =head2 entry for each utility and =item +entries for each change +Use L<XXX> with program names to get proper documentation linking. ] -Carp has been modified to avoid assuming that objects cannot be -overloaded without the L<overload> module loaded (this can happen with -objects created by XS modules). Previously, infinite recursion would -result if an XS-defined overload method itself called Carp. -L<[perl #132828]|https://rt.perl.org/Ticket/Display.html?id=132828> +=head2 L<XXX> -Carp now avoids using C<overload::StrVal>, partly because older versions -of L<overload> (included with perl 5.14 and earlier) load L<Scalar::Util> -at run time, which will fail if Carp has been invoked after a syntax error. +=over 4 =item * -L<charnames> has been upgraded from version 1.44 to 1.45. +XXX -=item * +=back -L<Compress::Raw::Zlib> has been upgraded from version 2.074 to 2.076. +=head1 Configuration and Compilation -This addresses a security vulnerability in older versions of the 'zlib' library -(which is bundled with Compress-Raw-Zlib). +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. -=item * +[ List changes as an =item entry ]. -L<Config::Extensions> has been upgraded from version 0.01 to 0.02. +=over 4 =item * -L<Config::Perl::V> has been upgraded from version 0.28 to 0.29. +XXX -=item * +=back -L<CPAN> has been upgraded from version 2.18 to 2.20. +=head1 Testing -=item * +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. -L<Data::Dumper> has been upgraded from version 2.167 to 2.170. +XXX If there were no significant test changes, say this: -Quoting of glob names now obeys the Useqq option -L<[perl #119831]|https://rt.perl.org/Ticket/Display.html?id=119831>. +Tests were added and changed to reflect the other additions and changes +in this release. -Attempts to set an option to C<undef> through a combined getter/setter -method are no longer mistaken for getter calls -L<[perl #113090]|https://rt.perl.org/Ticket/Display.html?id=113090>. +XXX If instead there were significant changes, say this: -=item * +Tests were added and changed to reflect the other additions and +changes in this release. Furthermore, these significant changes were +made: -L<Devel::Peek> has been upgraded from version 1.26 to 1.27. +[ List each test improvement as an =item entry ] -=item * +=over 4 -L<Devel::PPPort> has been upgraded from version 3.35 to 3.40. +=item * -L<Devel::PPPort> has moved from cpan-first to perl-first maintenance +XXX -Primary responsibility for the code in Devel::PPPort has moved into core perl. -In a practical sense there should be no change except that hopefully it will -stay more up to date with changes made to symbols in perl, rather than needing -to be updated after the fact. +=back -=item * +=head1 Platform Support -L<Digest::SHA> has been upgraded from version 5.96 to 6.01. +XXX Any changes to platform support should be listed in the sections below. -=item * +[ Within the sections, list each platform as an =item entry with specific +changes as paragraphs below it. ] -L<DirHandle> has been upgraded from version 1.04 to 1.05. +=head2 New Platforms -=item * +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. -L<DynaLoader> has been upgraded from version 1.42 to 1.45. +=over 4 -Its documentation now shows the use of C<__PACKAGE__> and direct object -syntax -L<[perl #132247]|https://rt.perl.org/Ticket/Display.html?id=132247>. +=item XXX-some-platform -=item * +XXX -L<Encode> has been upgraded from version 2.88 to 2.97. +=back -=item * +=head2 Discontinued Platforms -L<encoding> has been upgraded from version 2.19 to 2.22. +XXX List any platforms that this version of perl no longer compiles on. -=item * +=over 4 -L<Errno> has been upgraded from version 1.28 to 1.29. +=item XXX-some-platform -=item * +XXX -L<experimental> has been upgraded from version 0.016 to 0.019. +=back -=item * +=head2 Platform-Specific Notes -L<Exporter> has been upgraded from version 5.72 to 5.73. +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 * +=over 4 -L<ExtUtils::CBuilder> has been upgraded from version 0.280225 to 0.280230. +=item XXX-some-platform -=item * +XXX -L<ExtUtils::Constant> has been upgraded from version 0.23 to 0.25. +=back -=item * +=head1 Internal Changes -L<ExtUtils::Embed> has been upgraded from version 1.34 to 1.35. +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. -=item * +[ List each change as an =item entry ] -L<ExtUtils::Install> has been upgraded from version 2.04 to 2.14. +=over 4 =item * -L<ExtUtils::MakeMaker> has been upgraded from version 7.24 to 7.34. - -=item * +XXX -L<ExtUtils::Miniperl> has been upgraded from version 1.06 to 1.08. +=back -=item * +=head1 Selected Bug Fixes -L<ExtUtils::ParseXS> has been upgraded from version 3.34 to 3.39. +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 an =item entry ] -L<ExtUtils::Typemaps> has been upgraded from version 3.34 to 3.38. +=over 4 =item * -L<ExtUtils::XSSymSet> has been upgraded from version 1.3 to 1.4. +XXX -=item * +=back -L<feature> has been upgraded from version 1.47 to 1.52. +=head1 Known Problems -=item * +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 an =item entry ] -L<fields> has been upgraded from version 2.23 to 2.24. +=over 4 =item * -L<File::Copy> has been upgraded from version 2.32 to 2.33. +XXX -It will now use the sub-second precision variant of utime() supplied by -L<Time::HiRes> where available. -L<[perl #132401]|https://rt.perl.org/Ticket/Display.html?id=132401>. +=back -=item * +=head1 Errata From Previous Releases -L<File::Fetch> has been upgraded from version 0.52 to 0.56. +=over 4 =item * -L<File::Glob> has been upgraded from version 1.28 to 1.31. - -=item * +XXX Add anything here that we forgot to add, or were mistaken about, in +the perldelta of a previous release. -L<File::Path> has been upgraded from version 2.12_01 to 2.15. +=back -=item * +=head1 Obituary -L<File::Spec> and L<Cwd> have been upgraded from version 3.67 to 3.74. +XXX If any significant core contributor or member of the CPAN community has +died, add a short obituary here. -=item * +=head1 Acknowledgements -L<File::stat> has been upgraded from version 1.07 to 1.08. - -=item * - -L<FileCache> has been upgraded from version 1.09 to 1.10. - -=item * - -L<Filter::Simple> has been upgraded from version 0.93 to 0.95. - -=item * - -L<Filter::Util::Call> has been upgraded from version 1.55 to 1.58. - -=item * - -L<GDBM_File> has been upgraded from version 1.15 to 1.17. - -Its documentation now explains that C<each> and C<delete> don't mix in -hashes tied to this module -L<[perl #117449]|https://rt.perl.org/Ticket/Display.html?id=117449>. - -It will now retry opening with an acceptable block size if asking gdbm -to default the block size failed -L<[perl #119623]|https://rt.perl.org/Ticket/Display.html?id=119623>. - -=item * - -L<Getopt::Long> has been upgraded from version 2.49 to 2.5. - -=item * - -L<Hash::Util::FieldHash> has been upgraded from version 1.19 to 1.20. - -=item * - -L<I18N::Langinfo> has been upgraded from version 0.13 to 0.17. - -This module is now available on all platforms, emulating the system -L<nl_langinfo(3)> on systems that lack it. Some caveats apply, as -L<detailed in its documentation|I18N::Langinfo>, the most severe being -that, except for MS Windows, the C<CODESET> item is not implemented on -those systems, always returning C<"">. - -It now sets the UTF-8 flag in its returned scalar if the string contains -legal non-ASCII UTF-8, and the locale is UTF-8 -L<[perl #127288]|https://rt.perl.org/Ticket/Display.html?id=127288>. - -This update also fixes a bug in which the underlying locale was ignored -for the C<RADIXCHAR> (always was returned as a dot) and the C<THOUSEP> -(always empty). Now the locale-appropriate values are returned. - -=item * - -L<I18N::LangTags> has been upgraded from version 0.42 to 0.43. - -=item * - -L<if> has been upgraded from version 0.0606 to 0.0608. - -=item * - -L<IO> has been upgraded from version 1.38 to 1.39. - -=item * - -L<IO::Socket::IP> has been upgraded from version 0.38 to 0.39. - -=item * - -L<IPC::Cmd> has been upgraded from version 0.96 to 1.00. - -=item * - -L<JSON::PP> has been upgraded from version 2.27400_02 to 2.97001. - -=item * - -The C<libnet> distribution has been upgraded from version 3.10 to 3.11. - -=item * - -L<List::Util> has been upgraded from version 1.46_02 to 1.49. - -=item * - -L<Locale::Codes> has been upgraded from version 3.42 to 3.56. - -B<NOTE>: L<Locale::Codes> scheduled to be removed from core in Perl 5.30. - -=item * - -L<Locale::Maketext> has been upgraded from version 1.28 to 1.29. - -=item * - -L<Math::BigInt> has been upgraded from version 1.999806 to 1.999811. - -=item * - -L<Math::BigInt::FastCalc> has been upgraded from version 0.5005 to 0.5006. - -=item * - -L<Math::BigRat> has been upgraded from version 0.2611 to 0.2613. - -=item * - -L<Module::CoreList> has been upgraded from version 5.20170530 to 5.20180622. - -=item * - -L<mro> has been upgraded from version 1.20 to 1.22. - -=item * - -L<Net::Ping> has been upgraded from version 2.55 to 2.62. - -=item * - -L<NEXT> has been upgraded from version 0.67 to 0.67_01. - -=item * - -L<ODBM_File> has been upgraded from version 1.14 to 1.15. - -=item * - -L<Opcode> has been upgraded from version 1.39 to 1.43. - -=item * - -L<overload> has been upgraded from version 1.28 to 1.30. - -=item * - -L<PerlIO::encoding> has been upgraded from version 0.25 to 0.26. - -=item * - -L<PerlIO::scalar> has been upgraded from version 0.26 to 0.29. - -=item * - -L<PerlIO::via> has been upgraded from version 0.16 to 0.17. - -=item * - -L<Pod::Functions> has been upgraded from version 1.11 to 1.13. - -=item * - -L<Pod::Html> has been upgraded from version 1.2202 to 1.24. - -A title for the HTML document will now be automatically generated by -default from a "NAME" section in the POD document, as it used to be -before the module was rewritten to use L<Pod::Simple::XHTML> to do the -core of its job -L<[perl #110520]|https://rt.perl.org/Ticket/Display.html?id=110520>. - -=item * - -L<Pod::Perldoc> has been upgraded from version 3.28 to 3.2801. - -=item * - -The C<podlators> distribution has been upgraded from version 4.09 to 4.10. - -Man page references and function names now follow the Linux man page -formatting standards, instead of the Solaris standard. - -=item * - -L<POSIX> has been upgraded from version 1.76 to 1.84. - -Some more cautions were added about using locale-specific functions in -threaded applications. - -=item * - -L<re> has been upgraded from version 0.34 to 0.36. - -=item * - -L<Scalar::Util> has been upgraded from version 1.46_02 to 1.50. - -=item * - -L<SelfLoader> has been upgraded from version 1.23 to 1.25. - -=item * - -L<Socket> has been upgraded from version 2.020_03 to 2.027. - -=item * - -L<sort> has been upgraded from version 2.02 to 2.04. - -=item * - -L<Storable> has been upgraded from version 2.62 to 3.08. - -=item * - -L<Sub::Util> has been upgraded from version 1.48 to 1.49. - -=item * - -L<subs> has been upgraded from version 1.02 to 1.03. - -=item * - -L<Sys::Hostname> has been upgraded from version 1.20 to 1.22. - -=item * - -L<Term::ReadLine> has been upgraded from version 1.16 to 1.17. - -=item * - -L<Test> has been upgraded from version 1.30 to 1.31. - -=item * - -L<Test::Harness> has been upgraded from version 3.38 to 3.42. - -=item * - -L<Test::Simple> has been upgraded from version 1.302073 to 1.302133. - -=item * - -L<threads> has been upgraded from version 2.15 to 2.22. - -The documentation now better describes the problems that arise when -returning values from threads, and no longer warns about creating threads -in C<BEGIN> blocks. -L<[perl #96538]|https://rt.perl.org/Ticket/Display.html?id=96538> - -=item * - -L<threads::shared> has been upgraded from version 1.56 to 1.58. - -=item * - -L<Tie::Array> has been upgraded from version 1.06 to 1.07. - -=item * - -L<Tie::StdHandle> has been upgraded from version 4.4 to 4.5. - -=item * - -L<Time::gmtime> has been upgraded from version 1.03 to 1.04. - -=item * - -L<Time::HiRes> has been upgraded from version 1.9741 to 1.9759. - -=item * - -L<Time::localtime> has been upgraded from version 1.02 to 1.03. - -=item * - -L<Time::Piece> has been upgraded from version 1.31 to 1.3204. - -=item * - -L<Unicode::Collate> has been upgraded from version 1.19 to 1.25. - -=item * - -L<Unicode::Normalize> has been upgraded from version 1.25 to 1.26. - -=item * - -L<Unicode::UCD> has been upgraded from version 0.68 to 0.70. - -The function C<num> now accepts an optional parameter to help in -diagnosing error returns. - -=item * - -L<User::grent> has been upgraded from version 1.01 to 1.02. - -=item * - -L<User::pwent> has been upgraded from version 1.00 to 1.01. - -=item * - -L<utf8> has been upgraded from version 1.19 to 1.21. - -=item * - -L<vars> has been upgraded from version 1.03 to 1.04. - -=item * - -L<version> has been upgraded from version 0.9917 to 0.9923. - -=item * - -L<VMS::DCLsym> has been upgraded from version 1.08 to 1.09. - -=item * - -L<VMS::Stdio> has been upgraded from version 2.41 to 2.44. - -=item * - -L<warnings> has been upgraded from version 1.37 to 1.42. - -It now includes new functions with names ending in C<_at_level>, allowing -callers to specify the exact call frame. -L<[perl #132468]|https://rt.perl.org/Ticket/Display.html?id=132468> - -=item * - -L<XS::Typemap> has been upgraded from version 0.15 to 0.16. - -=item * - -L<XSLoader> has been upgraded from version 0.27 to 0.30. - -Its documentation now shows the use of C<__PACKAGE__>, and direct object -syntax for example C<DynaLoader> usage -L<[perl #132247]|https://rt.perl.org/Ticket/Display.html?id=132247>. - -Platforms that use C<mod2fname> to edit the names of loadable -libraries now look for bootstrap (.bs) files under the correct, -non-edited name. - -=back - -=head2 Removed Modules and Pragmata - -=over 4 - -=item * - -The C<VMS::stdio> compatibility shim has been removed. - -=back - -=head1 Documentation - -=head2 Changes to Existing Documentation - -We have attempted to update the documentation to reflect the changes -listed in this document. If you find any we have missed, send email -to L<perl...@perl.org|mailto:perl...@perl.org>. - -Additionally, the following selected changes have been made: - -=head3 L<perlapi> - -=over 4 - -=item * - -The API functions C<perl_parse()>, C<perl_run()>, and C<perl_destruct()> -are now documented comprehensively, where previously the only -documentation was a reference to the L<perlembed> tutorial. - -=item * - -The documentation of C<newGIVENOP()> has been belatedly updated to -account for the removal of lexical C<$_>. - -=item * - -The API functions C<newCONSTSUB()> and C<newCONSTSUB_flags()> are -documented much more comprehensively than before. - -=back - -=head3 L<perldata> - -=over 4 - -=item * - -The section "Truth and Falsehood" in L<perlsyn> has been moved into -L<perldata>. - -=back - -=head3 L<perldebguts> - -=over 4 - -=item * - -The description of the conditions under which C<DB::sub()> will be called -has been clarified. -L<[perl #131672]|https://rt.perl.org/Ticket/Display.html?id=131672> - -=back - -=head3 L<perldiag> - -=over 4 - -=item * L<perldiag/Variable length lookbehind not implemented in regex mE<sol>%sE<sol>> - -This now gives more ideas as to workarounds to the issue that was -introduced in Perl 5.18 (but not documented explicitly in its perldelta) -for the fact that some Unicode C</i> rules cause a few sequences such as - - (?<!st) - -to be considered variable length, and hence disallowed. - -=item * "Use of state $_ is experimental" in L<perldiag> - -This entry has been removed, as the experimental support of this construct was -removed in perl 5.24.0. - -=item * - -The diagnostic C<Initialization of state variables in list context -currently forbidden> has changed to C<Initialization of state variables -in list currently forbidden>, because list-context initialization of -single aggregate state variables is now permitted. - -=back - -=head3 L<perlembed> - -=over 4 - -=item * - -The examples in L<perlembed> have been made more portable in the way -they exit, and the example that gets an exit code from the embedded Perl -interpreter now gets it from the right place. The examples that pass -a constructed argv to Perl now show the mandatory null C<argv[argc]>. - -=item * - -An example in L<perlembed> used the string value of C<ERRSV> as a -format string when calling croak(). If that string contains format -codes such as C<%s> this could crash the program. - -This has been changed to a call to croak_sv(). - -An alternative could have been to supply a trivial format string: - - croak("%s", SvPV_nolen(ERRSV)); - -or as a special case for C<ERRSV> simply: - - croak(NULL); - -=back - -=head3 L<perlfunc> - -=over 4 - -=item * - -There is now a note that warnings generated by built-in functions are -documented in L<perldiag> and L<warnings>. -L<[perl #116080]|https://rt.perl.org/Ticket/Display.html?id=116080> - -=item * - -The documentation for the C<exists> operator no longer says that -autovivification behaviour "may be fixed in a future release". -We've determined that we're not going to change the default behaviour. -L<[perl #127712]|https://rt.perl.org/Ticket/Display.html?id=127712> - -=item * - -A couple of small details in the documentation for the C<bless> operator -have been clarified. -L<[perl #124428]|https://rt.perl.org/Ticket/Display.html?id=124428> - -=item * - -The description of C<@INC> hooks in the documentation for C<require> -has been corrected to say that filter subroutines receive a useless -first argument. -L<[perl #115754]|https://rt.perl.org/Ticket/Display.html?id=115754> - -=item * - -The documentation of C<ref> has been rewritten for clarity. - -=item * - -The documentation of C<use> now explains what syntactically qualifies -as a version number for its module version checking feature. - -=item * - -The documentation of C<warn> has been updated to reflect that since Perl -5.14 it has treated complex exception objects in a manner equivalent -to C<die>. -L<[perl #121372]|https://rt.perl.org/Ticket/Display.html?id=121372> - -=item * - -The documentation of C<die> and C<warn> has been revised for clarity. - -=item * - -The documentation of C<each> has been improved, with a slightly more -explicit description of the sharing of iterator state, and with -caveats regarding the fragility of while-each loops. -L<[perl #132644]|https://rt.perl.org/Ticket/Display.html?id=132644> - -=item * - -Clarification to C<require> was added to explain the differences between - - require Foo::Bar; - require "Foo/Bar.pm"; - -=back - -=head3 L<perlgit> - -=over 4 - -=item * - -The precise rules for identifying C<smoke-me> branches are now stated. - -=back - -=head3 L<perlguts> - -=over 4 - -=item * - -The section on reference counting in L<perlguts> has been heavily revised, -to describe references in the way a programmer needs to think about them -rather than in terms of the physical data structures. - -=item * - -Improve documentation related to UTF-8 multibytes. - -=back - -=head3 L<perlintern> - -=over 4 - -=item * - -The internal functions C<newXS_len_flags()> and C<newATTRSUB_x()> are -now documented. - -=back - -=head3 L<perlobj> - -=over 4 - -=item * - -The documentation about C<DESTROY> methods has been corrected, updated, -and revised, especially in regard to how they interact with exceptions. -L<[perl #122753]|https://rt.perl.org/Ticket/Display.html?id=122753> - -=back - -=head3 L<perlop> - -=over 4 - -=item * - -The description of the C<x> operator in L<perlop> has been clarified. -L<[perl #132460]|https://rt.perl.org/Ticket/Display.html?id=132460> - -=item * - -L<perlop> has been updated to note that C<qw>'s whitespace rules differ -from that of C<split>'s in that only ASCII whitespace is used. - -=item * - -The general explanation of operator precedence and associativity has -been corrected and clarified. -L<[perl #127391]|https://rt.perl.org/Ticket/Display.html?id=127391> - -=item * - -The documentation for the C<\> referencing operator now explains the -unusual context that it supplies to its operand. -L<[perl #131061]|https://rt.perl.org/Ticket/Display.html?id=131061> - -=back - -=head3 L<perlrequick> - -=over 4 - -=item * - -Clarifications on metacharacters and character classes - -=back - -=head3 L<perlretut> - -=over 4 - -=item * - -Clarify metacharacters. - -=back - -=head3 L<perlrun> - -=over 4 - -=item * - -Clarify the differences between B<< -M >> and B<< -m >>. -L<[perl #131518]|https://rt.perl.org/Ticket/Display.html?id=131518> - -=back - -=head3 L<perlsec> - -=over 4 - -=item * - -The documentation about set-id scripts has been updated and revised. -L<[perl #74142]|https://rt.perl.org/Ticket/Display.html?id=74142> - -=item * - -A section about using C<sudo> to run Perl scripts has been added. - -=back - -=head3 L<perlsyn> - -=over 4 - -=item * - -The section "Truth and Falsehood" in L<perlsyn> has been removed from -that document, where it didn't belong, and merged into the existing -paragraph on the same topic in L<perldata>. - -=item * - -The means to disambiguate between code blocks and hash constructors, -already documented in L<perlref>, are now documented in L<perlsyn> too. -L<[perl #130958]|https://rt.perl.org/Ticket/Display.html?id=130958> - -=back - -=head3 L<perluniprops> - -=over 4 - -=item * - -L<perluniprops> has been updated to note that C<\p{Word}> now includes -code points matching the C<\p{Join_Control}> property. The change to -the property was made in Perl 5.18, but not documented until now. There -are currently only two code points that match this property U+200C (ZERO -WIDTH NON-JOINER) and U+200D (ZERO WIDTH JOINER). - -=item * - -For each binary table or property, the documentation now includes which -characters in the range C<\x00-\xFF> it matches, as well as a list of -the first few ranges of code points matched above that. - -=back - -=head3 L<perlvar> - -=over 4 - -=item * - -The entry for C<$+> in perlvar has been expanded upon to describe handling of -multiply-named capturing groups. - -=back - -=head3 L<perlfunc>, L<perlop>, L<perlsyn> - -=over 4 - -=item * - -In various places, improve the documentation of the special cases -in the condition expression of a while loop, such as implicit C<defined> -and assignment to C<$_>. -L<[perl #132644]|https://rt.perl.org/Ticket/Display.html?id=132644> - -=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 * - -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>. - -=item * - -L<Can't "goto" into a binary or list expression|perldiag/"Can't E<quot>gotoE<quot> into a binary or list expression"> - -Use of C<goto> to jump into the parameter of a binary or list operator has -been prohibited, to prevent crashes and stack corruption. -L<[perl #130936]|https://rt.perl.org/Ticket/Display.html?id=130936> - -You may only enter the I<first> argument of an operator that takes a fixed -number of arguments, since this is a case that will not cause stack -corruption. -L<[perl #132854]|https://rt.perl.org/Ticket/Display.html?id=132854> - -=back - -=head3 New Warnings - -=over 4 - -=item * - -L<Old package separator used in string|perldiag/"Old package separator used in string"> - -(W syntax) You used the old package separator, "'", in a variable -named inside a double-quoted string; e.g., C<"In $name's house">. This -is equivalent to C<"In $name::s house">. If you meant the former, put -a backslash before the apostrophe (C<"In $name\'s house">). - -=item * - -L<perldiag/Locale '%s' contains (at least) the following characters which -have unexpected meanings: %s The Perl program will use the expected -meanings> - -=back - -=head2 Changes to Existing Diagnostics - -=over 4 - -=item * - -A false-positive warning that was issued when using a -numerically-quantified sub-pattern in a recursive regex has been -silenced. L<[perl #131868]|https://rt.perl.org/Public/Bug/Display.html?id=131868> - -=item * - -The warning about useless use of a concatenation operator in void context -is now generated for expressions with multiple concatenations, such as -C<$a.$b.$c>, which used to mistakenly not warn. -L<[perl #6997]|https://rt.perl.org/Ticket/Display.html?id=6997> - -=item * - -Warnings that a variable or subroutine "masks earlier declaration in same -...", or that an C<our> variable has been redeclared, have been moved to a -new warnings category "shadow". Previously they were in category "misc". - -=item * - -The deprecation warning from C<Sys::Hostname::hostname()> saying that -it doesn't accept arguments now states the Perl version in which the -warning will be upgraded to an error. -L<[perl #124349]|https://rt.perl.org/Ticket/Display.html?id=124349> - -=item * - -The L<perldiag> entry for the error regarding a set-id script has been -expanded to make clear that the error is reporting a specific security -vulnerability, and to advise how to fix it. - -=item * - -The C<< Unable to flush stdout >> error message was missing a trailing -newline. [debian #875361] - -=back - -=head1 Utility Changes - -=head2 L<perlbug> - -=over 4 - -=item * - -C<--help> and C<--version> options have been added. - -=back - -=head1 Configuration and Compilation - -=over 4 - -=item * C89 requirement - -Perl has been documented as requiring a C89 compiler to build since October -1998. A variety of simplifications have now been made to Perl's internals to -rely on the features specified by the C89 standard. We believe that this -internal change hasn't altered the set of platforms that Perl builds on, but -please report a bug if Perl now has new problems building on your platform. - -=item * - -On GCC, C<-Werror=pointer-arith> is now enabled by default, -disallowing arithmetic on void and function pointers. - -=item * - -Where an HTML version of the documentation is installed, the HTML -documents now use relative links to refer to each other. Links from -the index page of L<perlipc> to the individual section documents are -now correct. -L<[perl #110056]|https://rt.perl.org/Ticket/Display.html?id=110056> - -=item * - -F<lib/unicore/mktables> now correctly canonicalizes the names of the -dependencies stored in the files it generates. - -F<regen/mk_invlists.pl>, unlike the other F<regen/*.pl> scripts, used -C<$0> to name itself in the dependencies stored in the files it -generates. It now uses a literal so that the path stored in the -generated files doesn't depend on how F<regen/mk_invlists.pl> is -invoked. - -This lack of canonical names could cause test failures in F<t/porting/regen.t>. -L<[perl #132925]|https://rt.perl.org/Ticket/Display.html?id=132925> - -=item * New probes - -=over 2 - -=item HAS_BUILTIN_ADD_OVERFLOW - -=item HAS_BUILTIN_MUL_OVERFLOW - -=item HAS_BUILTIN_SUB_OVERFLOW - -=item HAS_THREAD_SAFE_NL_LANGINFO_L - -=item HAS_LOCALECONV_L - -=item HAS_MBRLEN - -=item HAS_MBRTOWC - -=item HAS_MEMRCHR - -=item HAS_NANOSLEEP - -=item HAS_STRNLEN ... 828 lines suppressed ... -- Perl5 Master Repository