Update dependency multidict to v6.6.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
multidict	==6.0.5 -> ==6.6.3

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Release Notes

aio-libs/multidict (multidict)

v6.6.3

Compare Source

=====

(2025-06-30)

Bug fixes

• Fixed inconsistencies generated by the C implementation of _md_shrink() which might later lead to assertion failures and crash -- by :user:Romain-Geissler-1A.

  Related issues and pull requests on GitHub:
  :issue:1229.

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v6.6.2

Compare Source

=====

(2025-06-28)

Bug fixes

• Fixed a memory corruption issue in the C implementation of _md_shrink() that could lead to segmentation faults and data loss when items were deleted from a :class:~multidict.MultiDict. The issue was an edge case in the pointer arithmetic during the compaction phase -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1221, :issue:1222.

• Fixed format string compilation errors in debug builds on 32-bit platforms by using portable %zd format specifiers for Py_ssize_t values instead of %ld -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1225, :issue:1226.

Packaging updates and notes for downstreams

• Re-enabled 32-bit Linux wheel builds that were disabled by default in cibuildwheel 3.0.0 -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1225, :issue:1227.

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v6.6.1

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=====

(2025-06-28)

Bug fixes

• If :meth:multidict.MultiDict.extend, :meth:multidict.MultiDict.merge, or :meth:multidict.MultiDict.update raises an exception, now the multidict internal state is correctly restored.
  Patch by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1215.

Contributor-facing changes

• Fixed setuptools deprecation warning about the license specification -- by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1216.

• Fix compiler warnings and convert them to errors -- by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1217.

---

v6.6.0

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=====

(2025-06-27)

Features

• Added :meth:multidict.MultiDict.merge which copies all items from arguments if its key
  not exist in the dictionary -- by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:292.

• Stopped reallocating memory for the internal htkeys_t structure when inserting new items if the
  multidict has deleted items and it could be collapsed in-place. Removal of
  malloc()/free() improves the performance slightly.

  The change affects C implementation only, pure Python code is not changed.

  Patch by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1200.

• C implementation of :class:multidict.MultiDict.getall now is slightly faster if it returns nothing -- by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1212.

Improved documentation

• Replaced docstring for :meth:multidict.MultiDict.update to don't use RST/markdown markup.

  Related issues and pull requests on GitHub:
  :issue:1203.

• Improved documentation for :meth:multidict.MultiDict.extend and :meth:multidict.MultiDict.update -- by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1205.

Contributor-facing changes

• When building wheels, the source distribution is now passed directly
  to the cibuildwheel invocation -- by :user:webknjaz.

  Related issues and pull requests on GitHub:
  :issue:1199.

• Set up PYTHONHASHSEED for benchmarks execution to make measured times stable -- by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1202.

---

v6.5.1

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=====

(2025-06-24)

Bug fixes

• Fixed a bug in C implementation when multidict is resized and it has deleted slots.

  The bug was introduced by multidict 6.5.0 release.

  Patch by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1195.

Contributor-facing changes

• A pair of code formatters for Python and C have been configured in the pre-commit tool.

  Related issues and pull requests on GitHub:
  :issue:1123.

• Shorted fixture parametrization ids.

  For example, test_keys_view_xor[case-insensitive-pure-python-module] becomes test_keys_view_xor[ci-py] -- by :user:asvetlov.

  Related issues and pull requests on GitHub:
  :issue:1192.

• The :file:reusable-cibuildwheel.yml workflow has been refactored to
  be more generic and :file:ci-cd.yml now holds all the configuration
  toggles -- by :user:webknjaz.

  Related issues and pull requests on GitHub:
  :issue:1193.

---

v6.5.0

Compare Source

=====

(2025-06-17)

.. note::

The release was yanked because of :issue:1195, multidict 6.5.1 should be used
instead.

Features

• Replace internal implementation from an array of items to hash table.
  algorithmic complexity for lookups is switched from O(N) to O(1).

  The hash table is very similar to :class:dict from CPython but it allows keys duplication.

  The benchmark shows 25-50% boost for single lookups, x2-x3 for bulk updates, and x20 for
  some multidict view operations. The gain is not for free:
  :class:~multidict.MultiDict.add and :class:~multidict.MultiDict.extend are 25-50%
  slower now. We consider it as acceptable because the lookup is much more common
  operation that addition for the library domain.

  Related issues and pull requests on GitHub:
  :issue:1128.

Contributor-facing changes

• Builds have been added for arm64 Windows
  wheels and the reusable-build-wheel.yml
  template has been modified to allow for
  an os value (windows-11-arm) which
  does not end with the -latest postfix.

  Related issues and pull requests on GitHub:
  :issue:1167.

---

v6.4.4

Compare Source

=====

(2025-05-19)

Bug fixes

• Fixed a segmentation fault when calling :py:meth:multidict.MultiDict.setdefault with a single argument -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1160.

• Fixed a segmentation fault when attempting to directly instantiate view objects
  (multidict._ItemsView, multidict._KeysView, multidict._ValuesView) -- by :user:bdraco.

  View objects now raise a proper :exc:TypeError with the message "cannot create '...' instances directly"
  when direct instantiation is attempted.

  View objects should only be created through the proper methods: :py:meth:multidict.MultiDict.items,
  :py:meth:multidict.MultiDict.keys, and :py:meth:multidict.MultiDict.values.

  Related issues and pull requests on GitHub:
  :issue:1164.

Miscellaneous internal changes

• :class:multidict.MultiDictProxy was refactored to rely only on
  :class:multidict.MultiDict public interface and don't touch any implementation
  details.

  Related issues and pull requests on GitHub:
  :issue:1150.

• Multidict views were refactored to rely only on
  :class:multidict.MultiDict API and don't touch any implementation
  details.

  Related issues and pull requests on GitHub:
  :issue:1152.

• Dropped internal _Impl class from pure Python implementation, both pure Python and C
  Extension follows the same design internally now.

  Related issues and pull requests on GitHub:
  :issue:1153.

---

v6.4.3

Compare Source

=====

(2025-04-10)

Bug fixes

• Fixed building the library in debug mode.

  Related issues and pull requests on GitHub:
  :issue:1144.

• Fixed custom PyType_GetModuleByDef() when non-heap type object was passed.

  Related issues and pull requests on GitHub:
  :issue:1147.

Packaging updates and notes for downstreams

• Added the ability to build in debug mode by setting :envvar:MULTIDICT_DEBUG_BUILD in the environment -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1145.

---

v6.4.2

Compare Source

v6.4.1

Compare Source

=====

(2025-04-09)

No significant changes.

---

v6.4.0

Compare Source

=====

(2025-04-09)

Bug fixes

• Fixed a memory leak creating new :class:~multidict.istr objects -- by :user:bdraco.

  The leak was introduced in 6.3.0

  Related issues and pull requests on GitHub:
  :issue:1133.

• Fixed reference counting when calling :py:meth:multidict.MultiDict.update -- by :user:bdraco.

  The leak was introduced in 4.4.0

  Related issues and pull requests on GitHub:
  :issue:1135.

Features

• Switched C Extension to use heap types and the module state.

  Related issues and pull requests on GitHub:
  :issue:1125.

• Started building armv7l wheels -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1127.

---

v6.3.2

Compare Source

v6.3.1

Compare Source

=====

(2025-04-01)

Bug fixes

• Fixed keys not becoming case-insensitive when :class:multidict.CIMultiDict is created by passing in a :class:multidict.MultiDict -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1112.

• Fixed the pure Python version mutating the original :class:multidict.MultiDict when creating a new :class:multidict.CIMultiDict from an existing one when keyword arguments are also passed -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1113.

• Prevented crashing with a segfault when :func:repr is called for recursive multidicts and their proxies and views.

  Related issues and pull requests on GitHub:
  :issue:1115.

---

v6.3.0

Compare Source

v6.2.0

Compare Source

v6.1.0

Compare Source

==================

Bug fixes

• Covered the unreachable code path in
  multidict._multidict_base._abc_itemsview_register()
  with typing -- by :user:skinnyBat.

  Related issues and pull requests on GitHub:
  :issue:928.

Features

• Added support for Python 3.13 -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:1002.

Removals and backward incompatible breaking changes

• Removed Python 3.7 support -- by :user:bdraco.

  Related issues and pull requests on GitHub:
  :issue:997.

Contributor-facing changes

• Added tests to have full code coverage of the
  multidict._multidict_base._viewbaseset_richcmp() function
  -- by :user:skinnyBat.

  Related issues and pull requests on GitHub:
  :issue:928.

• The deprecated <https://hynek.me/til/set-output-deprecation-github-actions/>_
  ::set-output workflow command has been replaced
  by the $GITHUB_OUTPUT environment variable
  in the GitHub Actions CI/CD workflow definition.

  Related issues and pull requests on GitHub:
  :issue:940.

• codecov-action <https://github.com/codecov/codecov-action>_
  has been temporarily downgraded to v3
  in the GitHub Actions CI/CD workflow definitions
  in order to fix uploading coverage to Codecov_.
  See this issue <https://github.com/codecov/codecov-action/issues/1252>_
  for more details.

  .. _Codecov: https://codecov.io/gh/aio-libs/multidict?flags\[]=pytest

  Related issues and pull requests on GitHub:
  :issue:941.

• In the GitHub Actions CI/CD workflow definition,
  the Get pip cache dir step has been fixed for
  Windows runners by adding shell: bash.
  See actions/runner#2224 <https://github.com/actions/runner/issues/2224>_
  for more details.

  Related issues and pull requests on GitHub:
  :issue:942.

• Interpolation of the pip cache keys has been
  fixed by adding missing $ syntax
  in the GitHub Actions CI/CD workflow definition.

  Related issues and pull requests on GitHub:
  :issue:943.

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