perl5222delta - what is new for perl v5.22.2
This document describes differences between the 5.22.1 release and
the 5.22.2 release.
If you are upgrading from an earlier release such as 5.22.0, first
read perl5221delta, which describes differences between 5.22.0 and
5.22.1.
This is CVE-2015-8608. For more information see [perl #126755]
<https://rt.perl.org/Ticket/Display.html?id=126755>.
This is CVE-2015-8607. For more information see [perl #126862]
<https://rt.perl.org/Ticket/Display.html?id=126862>.
In 5.22.0 perl started setting umask to
0600 before calling
mkstemp(3) and restoring it afterwards. This
wrongfully tells open(2) to strip the owner read and
write bits from the given mode before applying it, rather than the intended
negation of leaving only those bits in place.
Systems that use mode 0666 in
mkstemp(3) (like old versions of glibc) create a
file with permissions 0066, leaving world read and
write permissions regardless of current umask.
This has been fixed by using umask 0177
instead.
[perl #127322]
<https://rt.perl.org/Ticket/Display.html?id=127322>
Validation that will detect both a short salt and invalid
characters in the salt has been added.
[perl #126922]
<https://rt.perl.org/Ticket/Display.html?id=126922>
Previously, if an environment variable appeared more than once in
"environ[]", %ENV
would contain the last entry for that name, while a typical
"getenv()" would return the first entry.
We now make sure %ENV contains the same as what
"getenv()" returns.
Secondly, we now remove duplicates from
"environ[]", so if a setting with that
name is set in %ENV we won't pass an unsafe value to
a child process.
This is CVE-2016-2381.
There are no changes intentionally incompatible with Perl 5.22.1.
If any exist, they are bugs, and we request that you submit a report. See
"Reporting Bugs" below.
- File::Spec has been upgraded from version 3.56 to 3.56_01.
"canonpath()" now preserves
taint. See "Fix loss of taint in
"canonpath()"".
- Module::CoreList has been upgraded from version 5.20151213 to 5.20160429.
The version number of Digest::SHA listed for Perl 5.18.4 was
wrong and has been corrected. Likewise for the version number of Config
in 5.18.3 and 5.18.4. [perl #127624]
<https://rt.perl.org/Ticket/Display.html?id=127624>
perldiag
- •
- The explanation of the warning "unable to close filehandle
%s properly: %s"
which can occur when doing an implicit close of a filehandle has been
expanded and improved.
perlfunc
- •
- The documentation of "hex()" has been
revised to clarify valid inputs.
- Dtrace builds now build successfully on systems with a newer dtrace that
require an input object file that uses the probes in the .d file.
Previously the probe would fail and cause a build failure.
[perl #122287]
<https://rt.perl.org/Ticket/Display.html?id=122287>
- Configure no longer probes for libnm by default. Originally
this was the "New Math" library, but the name has been re-used
by the GNOME NetworkManager.
[perl #127131]
<https://rt.perl.org/Ticket/Display.html?id=127131>
- Configure now knows about gcc 5.
- Compiling perl with -DPERL_MEM_LOG now works again.
- Darwin
- Compiling perl with -Dusecbacktrace on Darwin now works again.
[perl #127764]
<https://rt.perl.org/Ticket/Display.html?id=127764>
- OS X/Darwin
- Builds with both -DDEBUGGING and threading enabled would fail with
a "panic: free from wrong pool" error when built or tested from
Terminal on OS X. This was caused by perl's internal management of the
environment conflicting with an atfork handler using the libc
"setenv()" function to update the
environment.
Perl now uses
"setenv()"/"unsetenv()"
to update the environment on OS X.
[perl #126240]
<https://rt.perl.org/Ticket/Display.html?id=126240>
- ppc64el
- The floating point format of ppc64el (Debian naming for little-endian
PowerPC) is now detected correctly.
- Tru64
- A test failure in t/porting/extrefs.t has been fixed.
- •
- An unwarranted assertion in
"Perl_newATTRSUB_x()" has been removed.
If a stub subroutine definition with a prototype has been seen, then any
subsequent stub (or definition) of the same subroutine with an attribute
was causing an assertion failure because of a null pointer.
[perl #126845]
<https://rt.perl.org/Ticket/Display.html?id=126845>
- Calls to the placeholder &PL_sv_yes used
internally when an "import()" or
"unimport()" method isn't found now
correctly handle scalar context. [perl #126042]
<https://rt.perl.org/Ticket/Display.html?id=126042>
- The "pipe()" operator would assert for
"DEBUGGING" builds instead of producing
the correct error message. The condition asserted on is detected and
reported on correctly without the assertions, so the assertions were
removed. [perl #126480]
<https://rt.perl.org/Ticket/Display.html?id=126480>
- In some cases, failing to parse a here-doc would attempt to use freed
memory. This was caused by a pointer not being restored correctly. [perl
#126443] <https://rt.perl.org/Ticket/Display.html?id=126443>
- Perl now reports more context when it sees an array where it expects to
see an operator, and avoids an assertion failure. [perl #123737]
<https://rt.perl.org/Ticket/Display.html?id=123737>
- If a here-doc was found while parsing another operator, the parser had
already read end of file, and the here-doc was not terminated, perl could
produce an assertion or a segmentation fault. This now reliably complains
about the unterminated here-doc. [perl #125540]
<https://rt.perl.org/Ticket/Display.html?id=125540>
- Parsing beyond the end of the buffer when processing a
"#line" directive with no filename is
now avoided. [perl #127334]
<https://rt.perl.org/Ticket/Display.html?id=127334>
- Perl 5.22.0 added support for the C99 hexadecimal floating point notation,
but sometimes misparsed hex floats. This has been fixed. [perl #127183]
<https://rt.perl.org/Ticket/Display.html?id=127183>
- Certain regex patterns involving a complemented posix class in an inverted
bracketed character class, and matching something else optionally would
improperly fail to match. An example of one that could fail is
"qr/_?[^\Wbar]\x{100}/". This has been
fixed. [perl #127537]
<https://rt.perl.org/Ticket/Display.html?id=127537>
- Fixed an issue with "pack()" where
"pack "H"" (and
"pack "h"") could read past
the source when given a non-utf8 source and a utf8 target. [perl #126325]
<https://rt.perl.org/Ticket/Display.html?id=126325>
- Fixed some cases where perl would abort due to a segmentation fault, or a
C-level assert. [perl #126193]
<https://rt.perl.org/Ticket/Display.html?id=126193> [perl #126257]
<https://rt.perl.org/Ticket/Display.html?id=126257> [perl #126258]
<https://rt.perl.org/Ticket/Display.html?id=126258> [perl #126405]
<https://rt.perl.org/Ticket/Display.html?id=126405> [perl #126602]
<https://rt.perl.org/Ticket/Display.html?id=126602> [perl #127773]
<https://rt.perl.org/Ticket/Display.html?id=127773> [perl #127786]
<https://rt.perl.org/Ticket/Display.html?id=127786>
- A memory leak when setting $ENV{foo} on Darwin has
been fixed. [perl #126240]
<https://rt.perl.org/Ticket/Display.html?id=126240>
- Perl now correctly raises an error when trying to compile patterns with
unterminated character classes while there are trailing backslashes. [perl
#126141] <https://rt.perl.org/Ticket/Display.html?id=126141>
- "NOTHING" regops and
"EXACTFU_SS" regops in
"make_trie()" are now handled properly.
[perl #126206]
<https://rt.perl.org/Ticket/Display.html?id=126206>
- Perl now only tests "semctl()" if we
have everything needed to use it. In FreeBSD the
"semctl()" entry point may exist, but it
can be disabled by policy. [perl #127533]
<https://rt.perl.org/Ticket/Display.html?id=127533>
- A regression that allowed undeclared barewords as hash keys to work
despite strictures has been fixed. [perl #126981]
<https://rt.perl.org/Ticket/Display.html?id=126981>
- As an optimization (introduced in Perl 5.20.0),
"uc()",
"lc()",
"ucfirst()" and
"lcfirst()" sometimes modify their
argument in-place rather than returning a modified copy. The criteria for
this optimization has been made stricter to avoid these functions
accidentally modifying in-place when they should not, which has been
happening in some cases, e.g. in List::Util.
- Excessive memory usage in the compilation of some regular expressions
involving non-ASCII characters has been reduced. A more complete fix is
forthcoming in Perl 5.24.0.
Perl 5.22.2 represents approximately 5 months of development since
Perl 5.22.1 and contains approximately 3,000 lines of changes across 110
files from 24 authors.
Excluding auto-generated files, documentation and release tools,
there were approximately 1,500 lines of changes to 52 .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 5.22.2:
Aaron Crane, Abigail, Andreas König, Aristotle Pagaltzis,
Chris 'BinGOs' Williams, Craig A. Berry, Dagfinn Ilmari Mannsåker,
David Golden, David Mitchell, H.Merijn Brand, James E Keenan, Jarkko
Hietaniemi, Karen Etheridge, Karl Williamson, Matthew Horsfall, Niko Tyni,
Ricardo Signes, Sawyer X, Stevan Little, Steve Hay, Todd Rinaldo, Tony Cook,
Vladimir Timofeev, Yves Orton.
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 AUTHORS file in the Perl source distribution.
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 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
"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.
The Changes file for an explanation of how to view
exhaustive details on what changed.
The INSTALL file for how to build Perl.
The README file for general stuff.
The Artistic and Copying files for copyright
information.