5.12.0.
Some of the bug fixes in this release have been backported to subsequent
-releases of 5.12.x. Those are indicated with the 5.12.x version in
+releases of 5.12.x. Those are indicated with the 5.12.x version in
parentheses.
=head1 Notice
=head3 C</d>, C</l>, C</u>, C</a>, and C</aa> modifiers
-Four new regular expression modifiers have been added. These are mutually
+Four new regular expression modifiers have been added. These are mutually
exclusive; one only can be turned on at a time.
The C</l> modifier says to compile the regular expression as if it were
syntax [perl #76296].
C, Ruby, Python and PHP already supported this syntax, and it makes
-Perl more internally consistent. A round-trip with C<eval sprintf
+Perl more internally consistent. A round-trip with C<eval sprintf
"%#X", 0x10> now returns C<16>, the way C<eval sprintf "%#x", 0x10> does.
=head3 Overridable tie functions
=head3 New global variable C<${^GLOBAL_PHASE}>
A new global variable, C<${^GLOBAL_PHASE}>, has been added to allow
-introspection of the current phase of the perl interpreter. It's explained in
+introspection of the current phase of the perl interpreter. It's explained in
detail in L<perlvar/"${^GLOBAL_PHASE}"> and
L<perlmod/"BEGIN, UNITCHECK, CHECK, INIT and END">.
=head3 Clearing stashes
Stash list assignment C<%foo:: = ()> used to make the stash anonymous
-temporarily while it was being emptied. Consequently, any of its
+temporarily while it was being emptied. Consequently, any of its
subroutines referenced elsewhere would become anonymous (showing up as
-"(unknown)" in C<caller>). Now they retain their package names, such that
+"(unknown)" in C<caller>). Now they retain their package names, such that
C<caller> will return the original sub name if there is still a reference
to its typeglob, or "foo::__ANON__" otherwise [perl #79208].
$glob = *foo;
*$glob = *bar;
-The C<*$glob> on the second line returns a new immutable glob. That new
-glob is made an alias to C<*bar>. Then it is discarded. So the second
+The C<*$glob> on the second line returns a new immutable glob. That new
+glob is made an alias to C<*bar>. Then it is discarded. So the second
assignment has no effect.
See L<http://rt.perl.org/rt3/Public/Bug/Display.html?id=77810> for
=head3 C<given> return values
C<given> blocks now return the last evaluated
-expression, or an empty list if the block was exited by C<break>. Thus you
+expression, or an empty list if the block was exited by C<break>. Thus you
can now write:
my $type = do {
=head2 Deprecated modules
The following modules will be removed from the core distribution in a
-future release, and should be installed from CPAN instead. Distributions
+future release, and should be installed from CPAN instead. Distributions
on CPAN which require these should add them to their prerequisites. The
core versions of these modules will issue a deprecation warning.
=head2 Optimisation of shift; and pop; calls without arguments
Two fewer OPs are used for shift and pop calls with no argument (with
-implicit C<@_>). This change makes C<shift;> 5% faster than C<shift @_;>
+implicit C<@_>). This change makes C<shift;> 5% faster than C<shift @_;>
on non-threaded perls and 25% faster on threaded.
=head2 Optimisation of regexp engine string comparison work
members within the interpreter struct to change size without breaking
binary compatibility, so that bug fixes could be merged to a maintenance
branch that necessitated such a size change. This mechanism was redundant
-and penalised well-behaved code. It has been removed.
+and penalised well-behaved code. It has been removed.
=head2 Freeing weak references
C<Data::Dumper> has been upgraded from version 2.125 to 2.130_02.
-The indentation used to be off when C<$Data::Dumper::Terse> was set. This
+The indentation used to be off when C<$Data::Dumper::Terse> was set. This
has been fixed [perl #73604].
This upgrade also fixes a crash when using custom sort functions that might
C<overload::Method> can now handle subroutines that are themselves blessed
into overloaded classes [perl #71998].
-The documentation has greatly improved. See L</Documentation> below.
+The documentation has greatly improved. See L</Documentation> below.
=item *
Two bugs have been fixed [perl #84086]:
The symbol table name was lost when tying a hash, due to a thinko in
-C<TIEHASH>. The result was that all tied hashes interacted with the
+C<TIEHASH>. The result was that all tied hashes interacted with the
local symbol table.
Unless a symbol table name had been explicitly specified in the call
=item *
-C<Class::ISA> has been removed from the Perl core. Prior version was 0.36.
+C<Class::ISA> has been removed from the Perl core. Prior version was 0.36.
=item *
-C<Pod::Plainer> has been removed from the Perl core. Prior version was 1.02.
+C<Pod::Plainer> has been removed from the Perl core. Prior version was 1.02.
=item *
-C<Switch> has been removed from the Perl core. Prior version was 2.16.
+C<Switch> has been removed from the Perl core. Prior version was 2.16.
=back
Previously, if none of the C<gethostbyaddr>, C<gethostbyname> and
C<gethostent> functions were implemented on a given platform, they would
all die with the message 'Unsupported socket function "gethostent" called',
-with analogous messages for C<getnet*> and C<getserv*>. This has been
+with analogous messages for C<getnet*> and C<getserv*>. This has been
corrected.
=item *
=item *
-FreeBSD 7 no longer contains F</usr/bin/objformat>. At build time,
+FreeBSD 7 no longer contains F</usr/bin/objformat>. At build time,
Perl now skips the F<objformat> check for versions 7 and higher and
assumes ELF (5.12.1).
They allow extension authors to find and remove magic attached to
scalars based on both the magic type and the magic virtual table, similar to how
C<sv_magicext()> attaches magic of a certain type and with a given virtual table
-to a scalar. This eliminates the need for extensions to walk the list of
+to a scalar. This eliminates the need for extensions to walk the list of
C<MAGIC> pointers of an C<SV> to find the magic that belongs to them.
=head3 C<find_rundefsv>
=head3 Calling conventions for C<newFOROP> and C<newWHILEOP>
-The way the parser handles labels has been cleaned up and refactored. As a
+The way the parser handles labels has been cleaned up and refactored. As a
result, the C<newFOROP()> constructor function no longer takes a parameter
stating what label is to go in the state op.
=item *
-Assigning a glob to a PVLV used to convert it to a plain string. Now it
+Assigning a glob to a PVLV used to convert it to a plain string. Now it
works correctly, and a PVLV can hold a glob. This would happen when a
nonexistent hash or array element was passed to a subroutine:
local $@; # boom
}
-Now the glob entries are cleared before any destructors are called. This
+Now the glob entries are cleared before any destructors are called. This
also means that destructors can vivify entries in the glob. So perl tries
again and, if the entries are re-created too many times, dies with a
'panic: gp_free...' error message.
=item *
-We fixed a bug that could cause \N{} constructs followed by a single . to
+We fixed a bug that could cause \N{} constructs followed by a single . to
be parsed incorrectly [perl #74978] (5.12.1).
=item *
Non-commutative binary operators used to swap their operands if the same
tied scalar was used for both operands and returned a different value for
-each FETCH. For instance, if C<$t> returned 2 the first time and 3 the
-second, then C<$t/$t> would evaluate to 1.5. This has been fixed
+each FETCH. For instance, if C<$t> returned 2 the first time and 3 the
+second, then C<$t/$t> would evaluate to 1.5. This has been fixed
[perl #87708].
=item *
=item *
-C<$AUTOLOAD> used to remain tainted forever if it ever became tainted. Now
+C<$AUTOLOAD> used to remain tainted forever if it ever became tainted. Now
it is correctly untainted if an autoloaded method is called and the method
name was not tainted.
=item *
Calling C<< ->import >> on a class lacking an import method could corrupt
-the stack, resulting in strange behaviour. For instance,
+the stack, resulting in strange behaviour. For instance,
push @a, "foo", $b = bar->import;
=item *
-C<formline> no longer crashes when passed a tainted format picture. It also
+C<formline> no longer crashes when passed a tainted format picture. It also
taints C<$^A> now if its arguments are tainted [perl #79138].
=item *
The XS multicall API no longer causes subroutines to lose reference counts
if called via the multicall interface from within those very subroutines.
-This affects modules like List::Util. Calling one of its functions with an
+This affects modules like List::Util. Calling one of its functions with an
active subroutine as the first argument could cause a crash [perl #78070].
=item *
=item *
C<List::Util::first> misbehaves in the presence of a lexical C<$_>
-(typically introduced by C<my $_> or implicitly by C<given>). The variable
+(typically introduced by C<my $_> or implicitly by C<given>). The variable
which gets set for each iteration is the package variable C<$_>, not the
lexical C<$_>.
=item *
-Test-Harness was updated from 3.17 to 3.21 for this release. A rewrite
+Test-Harness was updated from 3.17 to 3.21 for this release. A rewrite
in how it handles non-Perl tests (in 3.17_01) broke argument passing to
non-Perl tests with L<prove> (RT #59186), and required that non-Perl
tests be run as C<prove ./test.sh> instead of C<prove test.sh> These
=item *
The changes in L<substr()|perlfunc/"substr EXPR,OFFSET,LENGTH,REPLACEMENT">
-broke C<HTML::Parser> <= 3.66. A fixed C<HTML::Parser> is available as versions
+broke C<HTML::Parser> <= 3.66. A fixed C<HTML::Parser> is available as versions
3.67 on CPAN.
=item *
-The changes in prototype handling break C<Switch>. A patch has been sent
+The changes in prototype handling break C<Switch>. A patch has been sent
upstream and will hopefully appear on CPAN soon.
=item *
Randy Kobes, creator of http://kobesearch.cpan.org/ and
contributor/maintainer to several core Perl toolchain modules, passed
away on September 18, 2010 after a battle with lung cancer. The community
-was richer for his involvement. He will be missed.
+was richer for his involvement. He will be missed.
=head1 Acknowledgements
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
+it to perl5-security-report@perl.org. This points to a closed subscription
unarchived mailing list, which includes all the core committers, who 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
+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.
https://perl5.git.perl.org / perl5.git / commitdiff