PERL5125DELTA(1) Perl Programmers Reference Guide PERL5125DELTA(1) #
PERL5125DELTA(1) Perl Programmers Reference Guide PERL5125DELTA(1)
NNAAMMEE #
perl5125delta - what is new for perl v5.12.5
DDEESSCCRRIIPPTTIIOONN #
This document describes differences between the 5.12.4 release and the
5.12.5 release.
If you are upgrading from an earlier release such as 5.12.3, first read
perl5124delta, which describes differences between 5.12.3 and 5.12.4.
SSeeccuurriittyy “"EEnnccooddee"” ddeeccooddee__xxss nn--bbyyttee hheeaapp--oovveerrffllooww ((CCVVEE--22001111--22993399)) A bug in “Encode” could, on certain inputs, cause the heap to overflow. This problem has been corrected. Bug reported by Robert Zacek.
“"FFiillee::::GGlloobb::::bbssdd__gglloobb(())“” mmeemmoorryy eerrrroorr wwiitthh GGLLOOBB__AALLTTDDIIRRFFUUNNCC ((CCVVEE--22001111--22772288)).. Calling “File::Glob::bsd_glob” with the unsupported flag GLOB_ALTDIRFUNC would cause an access violation / segfault. A Perl program that accepts a flags value from an external source could expose itself to denial of service or arbitrary code execution attacks. There are no known exploits in the wild. The problem has been corrected by explicitly disabling all unsupported flags and setting unused function pointers to null. Bug reported by Clément Lecigne.
HHeeaapp bbuuffffeerr oovveerrrruunn iinn ‘’xx’’ ssttrriinngg rreeppeeaatt ooppeerraattoorr ((CCVVEE--22001122--55119955)) Poorly written perl code that allows an attacker to specify the count to perl’s ‘x’ string repeat operator can already cause a memory exhaustion denial-of-service attack. A flaw in versions of perl before 5.15.5 can escalate that into a heap buffer overrun; coupled with versions of glibc before 2.16, it possibly allows the execution of arbitrary code.
This problem has been fixed.
IInnccoommppaattiibbllee CChhaannggeess There are no changes intentionally incompatible with 5.12.4. If any exist, they are bugs and reports are welcome.
MMoodduulleess aanndd PPrraaggmmaattaa UUppddaatteedd MMoodduulleess _B_:_:_C_o_n_c_i_s_e
B::Concise no longer produces mangled output with the --ttrreeee option [perl
#80632].
_c_h_a_r_n_a_m_e_s
A regression introduced in Perl 5.8.8 has been fixed, that caused
charnames::viacode(0) to return "undef" instead of the string "NULL"
[perl #72624].
_E_n_c_o_d_e _h_a_s _b_e_e_n _u_p_g_r_a_d_e_d _f_r_o_m _v_e_r_s_i_o_n _2_._3_9 _t_o _v_e_r_s_i_o_n _2_._3_9___0_1_.
See "Security".
_F_i_l_e_:_:_G_l_o_b _h_a_s _b_e_e_n _u_p_g_r_a_d_e_d _f_r_o_m _v_e_r_s_i_o_n _1_._0_7 _t_o _v_e_r_s_i_o_n _1_._0_7___0_1_.
See "Security".
_U_n_i_c_o_d_e_:_:_U_C_D
The documentation for the "upper" function now actually says "upper", not
"lower".
_M_o_d_u_l_e_:_:_C_o_r_e_L_i_s_t
Module::CoreList has been updated to version 2.50_02 to add data for this
release.
CChhaannggeess ttoo EExxiissttiinngg DDooccuummeennttaattiioonn ppeerrlleebbccddiicc The perlebcdic document contains a helpful table to use in “tr///” to convert between EBCDIC and Latin1/ASCII. Unfortunately, the table was the inverse of the one it describes. This has been corrected.
ppeerrlluunniiccooddee The section on User-Defined Case Mappings had some bad markup and unclear sentences, making parts of it unreadable. This has been rectified.
ppeerrlluunniipprrooppss This document has been corrected to take non-ASCII platforms into account.
IInnssttaallllaattiioonn aanndd CCoonnffiigguurraattiioonn IImmpprroovveemmeennttss PPllaattffoorrmm SSppeecciiffiicc CChhaannggeess Mac OS X There have been configuration and test fixes to make Perl build cleanly on Lion and Mountain Lion.
NetBSD
The NetBSD hints file was corrected to be compatible with NetBSD 6.*
SSeelleecctteedd BBuugg FFiixxeess • “chop” now correctly handles characters above “\x{7fffffff}” [perl #73246].
• "($<,$>) = (...)" stopped working properly in 5.12.0. It is supposed
to make a single "setreuid()" call, rather than calling "setruid()"
and "seteuid()" separately. Consequently it did not work properly.
This has been fixed [perl #75212].
• Fixed a regression of kkiillll(()) when a match variable is used for the
process ID to kill [perl #75812].
• "UNIVERSAL::VERSION" no longer leaks memory. It started leaking in
Perl 5.10.0.
• The C-level "my_strftime" functions no longer leaks memory. This
fixes a memory leak in "POSIX::strftime" [perl #73520].
• "caller" no longer leaks memory when called from the DB package if
@DB::args was assigned to after the first call to "caller". Carp was
triggering this bug [perl #97010].
• Passing to "index" an offset beyond the end of the string when the
string is encoded internally in UTF8 no longer causes panics [perl
#75898].
• Syntax errors in "(?{...})" blocks in regular expressions no longer
cause panic messages [perl #2353].
• Perl 5.10.0 introduced some faulty logic that made "U*" in the middle
of a pack template equivalent to "U0" if the input string was empty.
This has been fixed [perl #90160].
EErrrraattaa sspplliitt(()) aanndd @@ sspplliitt(()) no longer modifies @_ when called in scalar or void context. In void context it now produces a “Useless use of split” warning. This is actually a change introduced in perl 5.12.0, but it was missed from that release’s perl5120delta.
AAcckknnoowwlleeddggeemmeennttss Perl 5.12.5 represents approximately 17 months of development since Perl 5.12.4 and contains approximately 1,900 lines of changes across 64 files from 18 authors.
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 5.12.5:
Andy Dougherty, Chris 'BinGOs' Williams, Craig A. Berry, David Mitchell,
Dominic Hargreaves, Father Chrysostomos, Florian Ragwitz, George Greer,
Goro Fuji, Jesse Vincent, Karl Williamson, Leon Brocard, Nicholas Clark,
Rafael Garcia-Suarez, Reini Urban, Ricardo Signes, Steve Hay, Tony Cook.
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 _A_U_T_H_O_R_S file in the Perl source distribution.
RReeppoorrttiinngg BBuuggss 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 http://rt.perl.org/perlbug/ . 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 ppeerrllbbuugg 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 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.
SSEEEE AALLSSOO #
The _C_h_a_n_g_e_s file for an explanation of how to view exhaustive details on
what changed.
The _I_N_S_T_A_L_L file for how to build Perl.
The _R_E_A_D_M_E file for general stuff.
The _A_r_t_i_s_t_i_c and _C_o_p_y_i_n_g files for copyright information.
perl v5.36.3 2014-03-24 PERL5125DELTA(1)