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          example, modifying the reference would modify all places the
          reference was used, and encoding the decoded structure would
          unshare the previously shared hashes, as trheir reference count
          would be 1. Fixing this was rather involved, as perl lacks the
          ability to easily swap or copy arrays and hashes.
	- \0, \1, \undef do not work, and were not intended to ever work, as
          special values, despite being mentioned in the documentation (reported
          by nuclightq).
        - new feature: allow_weak_cycles.

1.86 Thu 04 Nov 2021 17:48:16 CET
	- fixed a wrong printf format specifier (reported by Petr Písař).

1.85 Sat 23 Oct 2021 04:59:56 CEST
	- left debugging printf in code, need a test for that :(

1.84 Thu 21 Oct 2021 03:11:52 CEST
	- fix a bug in validate_utf8 where we call perl's is_utf8_string with
          a lenght of zero for empty strings, but perl interprets that as
          "calculate length", causing spurious validation errors for
          empty strings.
	- include validate_utf8 in new_safe.
	- avoid some warnings.

1.83 Tue Dec  8 09:27:06 CET 2020
	- add CBOR::XS::as_map cast function.

1.82 Tue Dec  1 02:47:40 CET 2020
	- add CBOR::XS::as_bool cast function.

1.81 Mon Nov 30 19:29:33 CET 2020
	- cast functions were broken due to last-minute renaming. thats
          what you get for not having a tessuite.
	- Math::BigInt and Math::BigFloat are pretty broken (again),
          so disable some tests. (try printing the bigfloat
          799999999999999999998E99999999999999999998).

1.8  Sun Nov 29 22:35:13 CET 2020
	- experimental support for some type casts, as well as embedding
          raw cbor data.

1.71 Thu Nov 15 20:52:13 CET 2018
	- work around what smells like a perl bug w.r.t. exceptions
          thrown in callbacks.
	- update libecb.

1.7  Tue Jun 27 04:02:23 CEST 2017
	- SECURITY FIX: fix two bugs found by american fuzzy lop,
          upgrade is advised if you accept data from untrusted
          sources.
        - an out-of bound sharedref or stringref index could cause an
          out of bounds access - might be exploitable.
        - a decoding error during indefinite array or hash decoding
          could cause an endless loop.

1.6  Wed Dec  7 15:13:23 CET 2016
        - greatly expand the SECURITY IMPLICATIONS and similar sections.
        - new constructor new_safe, to create a secure CBOR::XS object.
        - new option forbid_objects, to disallow serialisation.
        - new CBOR::XS::safe_filter functionality.
        - fix a crash when decoding a cyclic data structure using
          stringref/pack_strings when allow_cycles is disabled.
        - fix a crash when decoding hash keys with length >= 2**31.
        - avoid unreasonably long decoding times for certain
          types of (corrupt) cbor texts.
        - support arrays and hashes with >= 2**31 members.

Changes  view on Meta::CPAN

          en- and decoding.
        - the above effectively implements all registered CBOR extensions
          in a sensible manner.
        - remove some weird dead code that was duplicated (%FILTER).
        - add t/58_hv.t, which tests hashes and the new text_* flags.
          hashes apparently were not encoded at all in any of the existing
          tests.
        - document Math::BigFloat base-2 performance/crash issues.
        - use stability canary.

1.41 Thu 25 Feb 15:22:03 CET 2016
	- avoid perl panics on nested FREEZE/THAW calls (testcase by
          Victor Efimov).

1.4  Mon Feb  8 05:10:15 CET 2016
        - buffer overflow fix: a fast path during decoding did not check
          remaining length when decoding hash keys, found by fuzzing.
          This can potentially leak information in the error message
          or crash the process.
	- use C style { 0 } struct initializer.
        - upgrade libecb.

1.3  Mon Apr 27 22:21:04 CEST 2015
	- the incremental parser didn't properly parse tagged values
          (testcase by Mons Anderson).
	- slightly speed up encoding of plain (nonmagical) arrays.
        - try to clarify further that effectively all 32 bit architectures
          have 64 bit integer support.
        - upgrade libecb.

1.26 Sat Oct 25 08:35:44 CEST 2014
	- update the t/57_incr.t subtest that would rely on 64 bit ints.
        - disable t/50_rfc.t test that fails because of broken data::dumper.

1.25 Sun Jan  5 15:19:14 CET 2014
	- map key decoding was pretty much botched due to the recent cleanups.
	- work around Time::Piece->epoch returning a string value, avoid encoding
          this as a tag 1 string.
        - enable more testcases in t/50_rfc.t, now that they work :)

1.2  Tue Dec 10 22:06:42 CET 2013
	- implement an incremental decoder.

1.12 Tue Dec  3 11:23:22 CET 2013
	- work around broken Time::Piece (in old versions of the module, %z doesn't
          work as documented, gives different results on different platforms(!)).

1.11 Sun Dec  1 18:00:00 CET 2013
	- new setting: validate_utf8, for when you can't trust your cbor data.
        - do not leak memory on decoding errors, when allow_cycles is enabled.
        - add default filters for tags 0 and 1, using Time::Piece.
        - more tests added.

1.1  Sat Nov 30 19:14:27 CET 2013
	- INCOMPATIBLE CHANGE: new decoder setting: allow_cyclic, needed to decode
          cyclic data structures (to avoid memleaks in unsuspecting code).
	- no longer "share" references that aren't, i.e. true/false/null/error/tagged.
	- fix stringref w.r.t. indefinite-length strings.
        - verify indefinite-length string chunk types.
        - do not allow extremely large arrays - assume an array element
          requires at least one CBOR byte, to avoid memory exhaustion attacks.
        - major code overhaul.

1.0  Thu Nov 28 16:43:31 CET 2013
        - use the now official tag values for extensions. remove the
          experimental notice. it's the real thing now, with real bugs.
        - renamed allow_stringref to pack_strings.
	- port to perl <= 5.16.
        - slightly improve the documentation.

0.09  Fri Nov 22 16:54:18 CET 2013
	- bignum/bigfloat/decimal support.
        - uri support.
        - tag filter functions support for decoding.
	- do not support reference-to-1/0/undef anymore, you need to use
          the Types::Serialiser objects now.
        - experimental sharable extension support (http://cbor.schmorp.de/value-sharing).
        - experimental stringref extension support (http://cbor.schmorp.de/stringref).
	- implement indirection tag (http://cbor.schmorp.de/indirection).

0.08  Wed Oct 30 11:10:43 CET 2013
	- defused another too fragile test.

0.07  Tue Oct 29 23:04:07 CET 2013
	- don't crash in decode when silly values are passed in.
        - considerably speed up map decoding when map keys
          are utf-8 or byte strings.
        - raising an exception in THAW should now work without
          leaking.

0.06  Tue Oct 29 16:56:07 CET 2013
	- do not leak when deserialiasing via THAW.
        - implement and document CBOR::XS creation/access/mutate
          methods.

0.05  Mon Oct 28 22:27:47 CET 2013
	- do not leak hash keys on decoding.

0.04  Sun Oct 27 23:47:47 CET 2013
	- implement TO_CBOR/FREEZE/THAW serialisation protocols.
        - requested perl-object and generic-object tags from iana.
        - switched to Types::Serialiser for true, false and error.
        - disabled some fragile tests (thanks, andk).

0.03  Sun Oct 27 00:28:41 CEST 2013
	- improve 32 bit platform compatibility.
        - take more advantage of ecb.h.
        - preliminary and bare-bones tagged support.
        - improved docs.