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=head1 NAME

Changes - public release history for Data::Dumper

=head1 DESCRIPTION

=over 8

=item 2,166 (Nov 29 2016)

Reduce memory usage by not importing from Carp
Reduce memory usage by removing unused overload require.

=item 2.165 (Nov 20 2016)

Remove impediment to compiling under C++11.

=item 2.164 (Nov 12 2016)

The XS implementation now handles the C<Deparse> option, so using it no
longer forces use of the pure-Perl version.

=item 2.161 (Jul 11 2016)

Perl 5.12 fix/workaround until fixed PPPort release.

Pre-5.12 fixes for test dependency.

=item 2.160 (Jul 3 2016)

Now handles huge inputs on 64bit perls.

Add Trailingcomma option. This is as suggested in RT#126813.

Significant refactoring of XS implementation.

Pure Perl implementation fixes in corner cases ("\n" dumped raw").

=item 2.154 (Sep 18 2014)

Most notably, this release fixes CVE-2014-4330:

  Don't recurse infinitely in Data::Dumper

  Add a configuration variable/option to limit recursion when dumping
  deep data structures.
  [...]
  This patch addresses CVE-2014-4330.  This bug was found and
  reported by: LSE Leading Security Experts GmbH employee Markus
  Vervier.

On top of that, there are several minor big fixes and improvements,
see "git log" if the core perl distribution for details.

=item 2.151 (Mar 7 2014)

A "useqq" implementation for the XS version of Data::Dumper.

Better compatibility wrt. hash key quoting between PP and XS
versions of Data::Dumper.

EBCDIC fixes.

64bit safety fixes (for very large arrays).

Build fixes for threaded perls.

clang warning fixes.

Warning fixes in tests on older perls.

Typo fixes in documentation.

=item 2.145 (Mar 15 2013)

Test refactoring and fixing wide and far.

Various old-perl compat fixes.

=item 2.143 (Feb 26 2013)

Address vstring related test failures on 5.8: Skip tests for
obscure case.

Major improvements to test coverage and significant refactoring.

Make Data::Dumper XS ignore Freezer return value. Fixes RT #116364.

Change call of isALNUM to equivalent but more clearly named isWORDCHAR

=item 2.139 (Dec 12 2012)

Supply an explicit dynamic_config => 0 in META

Properly list BUILD_REQUIRES prereqs (P5-RT#116028)

Some optimizations. Removed useless "register" declarations.

=item 2.136 (Oct 04 2012)

Promote to stable release.

Drop some "register" declarations.

=item 2.135_07 (Aug 06 2012)

Use the new utf8 to code point functions - fixing a potential
reading buffer overrun.

Data::Dumper: Sparseseen option to avoid building much of the seen
hash: This has been measured to, in some cases, provide a 50% speed-up

Dumper.xs: Avoid scan_vstring on 5.17.3 and up

Avoid a warning from clang when compiling Data::Dumper

Fix DD's dumping of qr|\/|

Data::Dumper's Perl implementation was not working with overloaded
blessed globs, which it thought were strings.

Allow Data::Dumper to load on miniperl

=item 2.135_02 (Dec 29 2011)

Makes DD dump *{''} properly.

[perl #101162] DD support for vstrings:
Support for vstrings to Data::Dumper, in both Perl and XS
implementations.

=item 2.135_01 (Dec 19 2011)

Make Data::Dumper UTF8- and null-clean with GVs.

In Dumper.xs, use sv_newmortal() instead of sv_mortalcopy(&PL_sv_undef)
for efficiency.

Suppress compiler warning

Keep verbatim pod in Data::Dumper within 80 cols

=item 2.131 (May 27 2011)

Essentially the same as version 2.130_02, but a production release.

=item 2.130_03 (May 20 2011)

Essentially the same as version 2.130_02, but a CPAN release
for the eventual 2.131.

=item 2.130_02

This was only shipped with the perl core, never released to CPAN.

Convert overload.t to Test::More

Fix some spelling errors

Fix some compiler warnings

Fix an out of bounds write in Data-Dumper with malformed utf8 input

=item 2.130 (Nov 20 2010)

C<Dumpxs> can now handle malformed UTF-8.

=item 2.129 (Oct 20 2010)

C<Dumpxs> no longer crashes with globs returned by C<*$io_ref>
[perl #72332].

=item 2.128 (Sep 10 2010)

Promote previous release to stable version with the correct version.

=item 2.127 (Sep 10 2010)

Promote previous release to stable version.

=item 2.126_01 (Sep  6 2010)

Port core perl changes e3ec2293dc, fe642606b19.
Fixes core perl RT #74170 (handle the stack changing in the
custom sort functions) and adds a test.

=item 2.126 (Apr 15 2010)

Fix Data::Dumper's Fix Terse(1) + Indent(2):
perl-RT #73604: When $Data::Dumper::Terse is true, the indentation is thrown
off. It appears to be acting as if the $VAR1 = is still there.

=item 2.125 (Aug  8 2009)

CPAN distribution fixes (meta information for META.yml).

=item 2.124 (Jun 13 2009)

Add three missing test files.

=item 2.123 (Jun 11 2009)

Re-add the INSTALLDIRS => 'perl' directive to Makefile.PL
of the CPAN release.

=item 2.122 (Jun  9 2009)

Promote previous developer release to stable release.

=item 2.121_20 (Jun  6 2009)

A host of bug fixes and improvements that have
accumulated in the perl core

Updated backport to 5.6.1 by Steffen Mueller <smueller@cpan.org>.

=item 2.121 (Aug 24 2003)

Backport to 5.6.1 by Ilya Martynov <ilya@martynov.org>.

=item 2.11  (unreleased)

C<0> is now dumped as such, not as C<'0'>.

qr// objects are now dumped correctly (provided a post-5.005_58)
overload.pm exists).

Implemented $Data::Dumper::Maxdepth, which was on the Todo list.
Thanks to John Nolan <jpnolan@Op.Net>.

=item 2.101 (30 Apr 1999)

Minor release to sync with version in 5.005_03.  Fixes dump of
dummy coderefs.

=item 2.10  (31 Oct 1998)

Bugfixes for dumping related undef values, globs, and better double
quoting: three patches suggested by Gisle Aas <gisle@aas.no>.

Escaping of single quotes in the XS version could get tripped up
by the presence of nulls in the string.  Fix suggested by
Slaven Rezic <eserte@cs.tu-berlin.de>.

Rather large scale reworking of the logic in how seen values
are stashed. Anonymous scalars that may be encountered while
traversing the structure are properly tracked, in case they become
used in data dumped in a later pass.  There used to be a problem
with the previous logic that prevented such structures from being
dumped correctly.

Various additions to the testsuite.

=item 2.09  (9 July 1998)

Implement $Data::Dumper::Bless, suggested by Mark Daku <daku@nortel.ca>.

=item 2.081  (15 January 1998)

Minor release to fix Makefile.PL not accepting MakeMaker args.

=item 2.08  (7 December 1997)

Glob dumps don't output superflous 'undef' anymore.

Fixes from Gisle Aas <gisle@aas.no> to make Dumper() work with
overloaded strings in recent perls, and his new testsuite.

require 5.004.

A separate flag to always quote hash keys (on by default).

Recreating known CODE refs is now better supported.

Changed flawed constant SCALAR bless workaround.

=item 2.07  (7 December 1996)

Dumpxs output is now exactly the same as Dump.  It still doesn't
honor C<Useqq> though.

Regression tests test for identical output and C<eval>-ability.

Bug in *GLOB{THING} output fixed.

Other small enhancements.

=item 2.06  (2 December 1996)

Bugfix that was serious enough for new release--the bug cripples
MLDBM.  Problem was "Attempt to modify readonly value..." failures
that stemmed for a misguided SvPV_force() instead of a SvPV().)

=item 2.05  (2 December 1996)

Fixed the type mismatch that was causing Dumpxs test to fail
on 64-bit platforms.

GLOB elements are dumped now when C<Purity> is set (using the
*GLOB{THING} syntax).

The C<Freezer> option can be set to a method name to call
before probing objects for dumping.  Some applications: objects with
external data, can re-bless themselves into a transitional package;
Objects the maintain ephemeral state (like open files) can put
additional information in the object to facilitate persistence.

The corresponding C<Toaster> option, if set, specifies
the method call that will revive the frozen object.

The C<Deepcopy> flag has been added to do just that.

Dumper does more aggressive cataloging of SCALARs encountered
within ARRAY/HASH structures. Thanks to Norman Gaywood 
<norm@godel.une.edu.au> for reporting the problem.

Objects that C<overload> the '""' operator are now handled
properly by the C<Dump> method.

Significant additions to the testsuite.

More documentation.

=item 2.04beta  (28 August 1996)

Made dump of glob names respect C<Useqq> setting.

[@$%] are now escaped now when in double quotes.

=item 2.03beta  (26 August 1996)

Fixed Dumpxs.  It was appending trailing nulls to globnames.
(reported by Randal Schwartz <merlyn@teleport.com>).

Calling the C<Indent()> method on a dumper object now correctly
resets the internal separator (reported by Curt Tilmes
<curt@ltpmail.gsfc.nasa.gov>).

New C<Terse> option to suppress the 'C<VARI<n> = >' prefix 
introduced.  If the option is set, they are output only when
absolutely essential.

The C<Useqq> flag is supported (but not by the XSUB version
yet).

Embedded nulls in keys are now handled properly by Dumpxs.

Dumper.xs now use various integer types in perl.h (should
make it compile without noises on 64 bit platforms, although
I haven't been able to test this).

All the dump methods now return a list of strings in a list
context.

=item 2.02beta  (13 April 1996)

Non portable sprintf usage in XS code fixed (thanks to 
Ulrich Pfeifer <pfeifer@charly.informatik.uni-dortmund.de>).

=item 2.01beta  (10 April 1996)

Minor bugfix (single digit numbers were always getting quoted).

=item 2.00beta  (9 April 1996)

C<Dumpxs> is now the exact XSUB equivalent of C<Dump>.  The XS version
is 4-5 times faster.

C<require 5.002>.

MLDBM example removed (as its own module, it has a separate CPAN 
reality now).

Fixed bugs in handling keys with wierd characters.  Perl can be
tripped up in its implicit quoting of the word before '=>'.  The
fix: C<Data::Dumper::Purity>, when set, always triggers quotes
around hash keys.

Andreas Koenig <k@anna.in-berlin.de> pointed out that handling octals
is busted.  His patch added.

Dead code removed, other minor documentation fixes.

=item 1.23      (3 Dec 1995)

MLDBM example added.

Several folks pointed out that quoting of ticks and backslashes 
in strings is missing. Added.

Ian Phillipps <ian@pipex.net> pointed out that numerics may lose 
precision without quotes.  Fixed.

=item 1.21     (20 Nov 1995)

Last stable version I can remember.

=back

=cut
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