[Python-checkins] gh-131895: fix clang `$PATH` on Darwin runners for tail-calling interpreter (#131903)

https://github.com/python/cpython/commit/39fa19a4ccb4c75d2421187e5b8d83c73b48ca4d commit: 39fa19a4ccb4c75d2421187e5b8d83c73b48ca4d branch: main author: Bénédikt Tran <10796600+picn...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-03-30T18:48:00Z

[Python-checkins] [3.13] gh-130655: Add a test for bad magic numbers in `.mo` files parsed by `gettext` (GH-131909) (#132077)

https://github.com/python/cpython/commit/2c05ebd1634259fafba8400e79c51419698a18d0 commit: 2c05ebd1634259fafba8400e79c51419698a18d0 branch: 3.13 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] gh-131238: Add pycore_interpframe.h to PYTHON_HEADERS (#131545)

https://github.com/python/cpython/commit/3a09986553dd7778cae43d552c9006a30973ce3a commit: 3a09986553dd7778cae43d552c9006a30973ce3a branch: main author: Victor Stinner committer: vstinner date: 2025-03-21T16:24:15+01:00 summary: gh-131238: Add pycore_interpframe.h to PYTHON_HEADERS (#131545) Add

[Python-checkins] gh-131807: fix ResourceWarning in test_ucn.py (#131808)

https://github.com/python/cpython/commit/adb67ed7e465410829ac0b1f903ec5678e0e51cc commit: adb67ed7e465410829ac0b1f903ec5678e0e51cc branch: main author: Thomas Grainger committer: vstinner date: 2025-03-28T15:55:40+01:00 summary: gh-131807: fix ResourceWarning in test_ucn.py (#131808) Co-authore

[Python-checkins] gh-130843: expose 48-bit timestamp for UUIDv7 (#131838)

https://github.com/python/cpython/commit/ba11f45dd969dfb039dfb47270de4f8c6a03d241 commit: ba11f45dd969dfb039dfb47270de4f8c6a03d241 branch: main author: Bénédikt Tran <10796600+picn...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-03-31T14:32:54+

[Python-checkins] gh-118915: Document `PY_MONITORING_IS_INSTRUMENTED_EVENT` (GH-128026)

https://github.com/python/cpython/commit/f81990024554a75e2ab31133a72d9f0954690435 commit: f81990024554a75e2ab31133a72d9f0954690435 branch: main author: Yuki Kobayashi committer: encukou date: 2025-03-18T17:34:01+01:00 summary: gh-118915: Document `PY_MONITORING_IS_INSTRUMENTED_EVENT` (GH-128026)

[Python-checkins] GH-131770: increase assumed WASI stack size to 131072 (wasi-sdk default) (#131844)

https://github.com/python/cpython/commit/6ab4acecf91413fccd39f78ff14775d83498dab5 commit: 6ab4acecf91413fccd39f78ff14775d83498dab5 branch: main author: Filipe Laíns 🇵🇸 committer: FFY00 date: 2025-04-04T09:34:02+01:00 summary: GH-131770: increase assumed WASI stack size to 131072 (wasi-sdk defaul

[Python-checkins] gh-109599: Expose `CapsuleType` via the `_types` module (#131969)

https://github.com/python/cpython/commit/231a50fa9a5444836c94cda50a56ecf080c7d3b0 commit: 231a50fa9a5444836c94cda50a56ecf080c7d3b0 branch: main author: Adam Turner <9087854+aa-tur...@users.noreply.github.com> committer: AA-Turner <9087854+aa-tur...@users.noreply.github.com> date: 2025-04-04T23:37:4

[Python-checkins] gh-131233: remove return-in-finally in multiprocessing/connection.py (#131416)

https://github.com/python/cpython/commit/3e2cceaa871a742a66711519d8e6998b186ae263 commit: 3e2cceaa871a742a66711519d8e6998b186ae263 branch: main author: Irit Katriel <1055913+iritkatr...@users.noreply.github.com> committer: iritkatriel <1055913+iritkatr...@users.noreply.github.com> date: 2025-03-21T

[Python-checkins] gh-131525: Remove `_HashedSeq` wrapper from `lru_cache` (gh-131922)

https://github.com/python/cpython/commit/0147be09d585e6b5e013ea2d1b24c77500d9a083 commit: 0147be09d585e6b5e013ea2d1b24c77500d9a083 branch: main author: Lukas Geiger committer: rhettinger date: 2025-03-31T08:23:41-05:00 summary: gh-131525: Remove `_HashedSeq` wrapper from `lru_cache` (gh-131922)

[Python-checkins] gh-129463, gh-128593: Simplify ForwardRef (#129465)

https://github.com/python/cpython/commit/ac14d4a23f58c1f3e1909753aa17c1c302ea771d commit: ac14d4a23f58c1f3e1909753aa17c1c302ea771d branch: main author: Jelle Zijlstra committer: JelleZijlstra date: 2025-04-05T04:36:34Z summary: gh-129463, gh-128593: Simplify ForwardRef (#129465) files: A Misc/N

[Python-checkins] Add tests for Bluetooth RFCOMM, HCI and SCO (GH-132023)

https://github.com/python/cpython/commit/2ccd6aae4dff09a672a68303032f0056b43622dd commit: 2ccd6aae4dff09a672a68303032f0056b43622dd branch: main author: Serhiy Storchaka committer: serhiy-storchaka date: 2025-04-04T14:33:09+03:00 summary: Add tests for Bluetooth RFCOMM, HCI and SCO (GH-132023) f

[Python-checkins] gh-127945: fix thread safety of creating instances of ctypes structures (#131716)

https://github.com/python/cpython/commit/bc5a028c132efd7598593b75ab86b690209a6e6b commit: bc5a028c132efd7598593b75ab86b690209a6e6b branch: main author: Kumar Aditya committer: kumaraditya303 date: 2025-03-30T15:22:30+05:30 summary: gh-127945: fix thread safety of creating instances of ctypes str

[Python-checkins] gh-130115: fix thread identifiers for 32-bit musl (#130391)

https://github.com/python/cpython/commit/72123063ddee84bb2c9d591a23f420997e35af5a commit: 72123063ddee84bb2c9d591a23f420997e35af5a branch: main author: Vincent Fazio committer: pitrou date: 2025-04-04T16:31:37+02:00 summary: gh-130115: fix thread identifiers for 32-bit musl (#130391) CPython's

[Python-checkins] gh-100239: more refined specialisation stats for BINARY_OP/SUBSCR (#132068)

https://github.com/python/cpython/commit/df59226997e067adcfa1bc8d045b7cc1de08906c commit: df59226997e067adcfa1bc8d045b7cc1de08906c branch: main author: Irit Katriel <1055913+iritkatr...@users.noreply.github.com> committer: iritkatriel <1055913+iritkatr...@users.noreply.github.com> date: 2025-04-04T

[Python-checkins] gh-118761: Lazily import annotationlib in typing (#132060)

https://github.com/python/cpython/commit/305be5fb1a1ece7f9651ae98053dbe79bf439aa4 commit: 305be5fb1a1ece7f9651ae98053dbe79bf439aa4 branch: main author: Jelle Zijlstra committer: JelleZijlstra date: 2025-04-04T08:57:10-07:00 summary: gh-118761: Lazily import annotationlib in typing (#132060) ann

[Python-checkins] [3.12] gh-130655: Add a test for corrupt `.mo` files in `gettext` (GH-131911) (#132080)

https://github.com/python/cpython/commit/05213afaa741444543eb69c34347cc55b2b77494 commit: 05213afaa741444543eb69c34347cc55b2b77494 branch: 3.12 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] [3.12] gh-128632: fix segfault on nested __classdict__ type param (GH… (#132090)

https://github.com/python/cpython/commit/3d3e7b0adaf62a2ed9925f93c3fad9cadd835b4a commit: 3d3e7b0adaf62a2ed9925f93c3fad9cadd835b4a branch: 3.12 author: Tomasz Pytel committer: JelleZijlstra date: 2025-04-04T15:48:57Z summary: [3.12] gh-128632: fix segfault on nested __classdict__ type param (GH…

[Python-checkins] gh-130655: Add a test for corrupt `.mo` files in `gettext` (#131911)

https://github.com/python/cpython/commit/a126cefc176a7ddbd1a09ce560195f6fd81a5c92 commit: a126cefc176a7ddbd1a09ce560195f6fd81a5c92 branch: main author: Tomas R. committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-04-04T13:26:59Z summary: gh-130655: Add a test for corrupt `.m

[Python-checkins] [3.12] gh-131418: remove unused legacy typedefs in `{md5,sha1}module.c` (GH-131420) (#131619)

https://github.com/python/cpython/commit/63a4273031337aa2353affbe2b162a601f95f3d1 commit: 63a4273031337aa2353affbe2b162a601f95f3d1 branch: 3.12 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] [3.13] gh-132075: Fix possible use of sockaddr structures with uninitialized members (GH-132076) (GH-132086)

https://github.com/python/cpython/commit/0c0ffbe39f2bf7fa47d505a6f23f60ec4936e557 commit: 0c0ffbe39f2bf7fa47d505a6f23f60ec4936e557 branch: 3.13 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: serhiy-storchaka date: 2025-04-04T14:33:57Z summary: [3.13] gh

[Python-checkins] [3.12] gh-130655: Add tests for `gettext.find()` (GH-130691) (#132083)

https://github.com/python/cpython/commit/65a01034e6f3e64be59cd8da9f53c54dd447bc08 commit: 65a01034e6f3e64be59cd8da9f53c54dd447bc08 branch: 3.12 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] [3.12] gh-130655: Add a test for bad magic numbers in `.mo` files parsed by `gettext` (GH-131909) (#132078)

https://github.com/python/cpython/commit/232e1059ed14678878a1f3a300ae5b33486889c3 commit: 232e1059ed14678878a1f3a300ae5b33486889c3 branch: 3.12 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] [3.13] gh-130655: Add a test for corrupt `.mo` files in `gettext` (GH-131911) (#132079)

https://github.com/python/cpython/commit/d8986b7f5e91f6aedf33da29d46c094a104e1025 commit: d8986b7f5e91f6aedf33da29d46c094a104e1025 branch: 3.13 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] gh-130655: Add a test for bad magic numbers in `.mo` files parsed by `gettext` (#131909)

https://github.com/python/cpython/commit/16a6270aa61c86c430a308c0f766a69a88c9a3a5 commit: 16a6270aa61c86c430a308c0f766a69a88c9a3a5 branch: main author: Tomas R. committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-04-04T13:26:15Z summary: gh-130655: Add a test for bad magic n

[Python-checkins] [3.13] gh-130655: Add tests for `gettext.find()` (GH-130691) (#132084)

https://github.com/python/cpython/commit/093c587388d0e4b87b9511232f47c9f4eaa22da9 commit: 093c587388d0e4b87b9511232f47c9f4eaa22da9 branch: 3.13 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] [3.12] gh-132075: Fix possible use of sockaddr structures with uninitialized members (GH-132076) (GH-132087)

https://github.com/python/cpython/commit/10f73f75c5696c7179cad2a1384e15f32ee56ecb commit: 10f73f75c5696c7179cad2a1384e15f32ee56ecb branch: 3.12 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: serhiy-storchaka date: 2025-04-04T14:29:12Z summary: [3.12] gh

[Python-checkins] [3.13] gh-128632: fix segfault on nested __classdict__ type param (GH-128744) (#132085)

https://github.com/python/cpython/commit/900dc2b0340fdd77314b69780dbe1397067b2104 commit: 900dc2b0340fdd77314b69780dbe1397067b2104 branch: 3.13 author: Tomasz Pytel committer: JelleZijlstra date: 2025-04-04T08:23:40-07:00 summary: [3.13] gh-128632: fix segfault on nested __classdict__ type param

[Python-checkins] gh-125434: Display thread name in faulthandler (#132016)

https://github.com/python/cpython/commit/37d47d496525142d12a94fb234c8b8311292c349 commit: 37d47d496525142d12a94fb234c8b8311292c349 branch: main author: Victor Stinner committer: vstinner date: 2025-04-04T12:24:41Z summary: gh-125434: Display thread name in faulthandler (#132016) files: A Misc/N

[Python-checkins] GH-131288: Use `_AddressOfReturnAddress` for MSVC in pycore_ceval.h (gh-131289)

https://github.com/python/cpython/commit/20098719dffe837fb0e516fbb97336e9a8e3354f commit: 20098719dffe837fb0e516fbb97336e9a8e3354f branch: main author: Chris Eibl <138194463+chris-e...@users.noreply.github.com> committer: colesbury date: 2025-04-04T09:03:12-04:00 summary: GH-131288: Use `_Address

[Python-checkins] gh-132075: Fix possible use of sockaddr structures with uninitialized members (GH-132076)

https://github.com/python/cpython/commit/345baa77ba2ce3b8ea8f2fad84754e5cc0b10938 commit: 345baa77ba2ce3b8ea8f2fad84754e5cc0b10938 branch: main author: Serhiy Storchaka committer: serhiy-storchaka date: 2025-04-04T17:09:58+03:00 summary: gh-132075: Fix possible use of sockaddr structures with un

[Python-checkins] gh-105499: Defer "import warnings" in typing (#132061)

https://github.com/python/cpython/commit/d1db43c139121202898e2d75df43ed2eb06a8470 commit: d1db43c139121202898e2d75df43ed2eb06a8470 branch: main author: Jelle Zijlstra committer: JelleZijlstra date: 2025-04-04T06:19:42-07:00 summary: gh-105499: Defer "import warnings" in typing (#132061) A bunch

[Python-checkins] gh-100239: fix bug in comparison (#132093)

https://github.com/python/cpython/commit/68e72cf3a80362d0a2d57ff0c9f02553c378e537 commit: 68e72cf3a80362d0a2d57ff0c9f02553c378e537 branch: main author: Irit Katriel <1055913+iritkatr...@users.noreply.github.com> committer: iritkatriel <1055913+iritkatr...@users.noreply.github.com> date: 2025-04-04T

[Python-checkins] GH-131498: Cases generator: manage stacks automatically (GH-132074)

https://github.com/python/cpython/commit/7099c75550c55050ac160cfe3519d49f2ef0c675 commit: 7099c75550c55050ac160cfe3519d49f2ef0c675 branch: main author: Mark Shannon committer: markshannon date: 2025-04-04T17:59:36+01:00 summary: GH-131498: Cases generator: manage stacks automatically (GH-132074)

[Python-checkins] gh-131933: Document UnionType/Union merger in What's New (#131941)

https://github.com/python/cpython/commit/7473c600a5890ffd87e8761c418bf3312ce7f38c commit: 7473c600a5890ffd87e8761c418bf3312ce7f38c branch: main author: Jelle Zijlstra committer: JelleZijlstra date: 2025-04-04T11:15:31-07:00 summary: gh-131933: Document UnionType/Union merger in What's New (#1319

[Python-checkins] gh-127945: mark `TestLocalization` as thread unsafe in ctypes (#131899)

https://github.com/python/cpython/commit/eaffc34d3ce38710d633f7246d3e15aaddee63d1 commit: eaffc34d3ce38710d633f7246d3e15aaddee63d1 branch: main author: Kumar Aditya committer: kumaraditya303 date: 2025-03-30T11:08:42Z summary: gh-127945: mark `TestLocalization` as thread unsafe in ctypes (#13189

[Python-checkins] Fix typo in `template_replace()` test helper docstring (#132094)

https://github.com/python/cpython/commit/ac3a7bfeccb752a59d88861e45b454db360aa69d commit: ac3a7bfeccb752a59d88861e45b454db360aa69d branch: main author: Victorien <65306057+vii...@users.noreply.github.com> committer: JelleZijlstra date: 2025-04-04T17:38:09Z summary: Fix typo in `template_replace()

[Python-checkins] [3.13] Fix typo in `template_replace()` test helper docstring (GH-132094) (#132095)

https://github.com/python/cpython/commit/53752d20c4f9258ac4b96332d60e40a8666f78f1 commit: 53752d20c4f9258ac4b96332d60e40a8666f78f1 branch: 3.13 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] [3.12] Fix typo in `template_replace()` test helper docstring (GH-132094) (#132096)

https://github.com/python/cpython/commit/1d8cd48f26dc3aeca3f4fe58a5cefe7312533645 commit: 1d8cd48f26dc3aeca3f4fe58a5cefe7312533645 branch: 3.12 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-0

[Python-checkins] gh-118761: Defer import of functools in annotationlib (#132059)

https://github.com/python/cpython/commit/255eb375a7cc3cb16698bebf42689e8bc783ed93 commit: 255eb375a7cc3cb16698bebf42689e8bc783ed93 branch: main author: Jelle Zijlstra committer: JelleZijlstra date: 2025-04-04T06:42:22-07:00 summary: gh-118761: Defer import of functools in annotationlib (#132059)

[Python-checkins] gh-132013: use relaxed atomics in hash of frozenset (#132014)

https://github.com/python/cpython/commit/76f6b5e64a8b6ea5a88606f3665cd9f52c2c2798 commit: 76f6b5e64a8b6ea5a88606f3665cd9f52c2c2798 branch: main author: Kumar Aditya committer: kumaraditya303 date: 2025-04-02T20:01:05+05:30 summary: gh-132013: use relaxed atomics in hash of frozenset (#132014) U

[Python-checkins] [3.13] gh-117657: Fix TSAN data race in _PyEval_SetTrace assertion (gh-131561) (#131564)

https://github.com/python/cpython/commit/94fbe97bbef374e240decc8a69107a639151ba02 commit: 94fbe97bbef374e240decc8a69107a639151ba02 branch: 3.13 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: colesbury date: 2025-03-21T18:48:40Z summary: [3.13] gh-117657

[Python-checkins] GH-131296: Fix clang-cl warnings on Windows in sqlite3 (GH-131906)

https://github.com/python/cpython/commit/4940d96135a92b90bbc1dcc399f665817f956640 commit: 4940d96135a92b90bbc1dcc399f665817f956640 branch: main author: Chris Eibl <138194463+chris-e...@users.noreply.github.com> committer: zooba date: 2025-03-31T16:15:31+01:00 summary: GH-131296: Fix clang-cl warn

[Python-checkins] gh-91349: Replace zlib with zlib-ng in Windows build (GH-131438)

https://github.com/python/cpython/commit/63a638c43f821e9c8b3256e7122c06e539dc585d commit: 63a638c43f821e9c8b3256e7122c06e539dc585d branch: main author: Steve Dower committer: zooba date: 2025-03-19T19:03:25Z summary: gh-91349: Replace zlib with zlib-ng in Windows build (GH-131438) files: A Misc

[Python-checkins] [3.13] gh-131277: allow EnvironmentVarGuard to unset more than one environment variable at once (GH-131280) (#131409)

https://github.com/python/cpython/commit/85c20374c09ddc143ae8fd3493bc99e7df6d3474 commit: 85c20374c09ddc143ae8fd3493bc99e7df6d3474 branch: 3.13 author: Bénédikt Tran <10796600+picn...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-03-18T13:48:59+

[Python-checkins] gh-125957: sync argument naming in sphinx docs of the cmath and help() (#125958)

https://github.com/python/cpython/commit/0a3eb8855ccea52c618db1cf09840c6368a3745f commit: 0a3eb8855ccea52c618db1cf09840c6368a3745f branch: main author: Sergey B Kirpichev committer: AA-Turner <9087854+aa-tur...@users.noreply.github.com> date: 2025-04-01T08:16:11+01:00 summary: gh-125957: sync ar

[Python-checkins] gh-105499: typing: Remove an unused function (#131946)

https://github.com/python/cpython/commit/0f511d8b44dd9993474402411af8c83f4964bc95 commit: 0f511d8b44dd9993474402411af8c83f4964bc95 branch: main author: Jelle Zijlstra committer: JelleZijlstra date: 2025-03-31T10:27:03-07:00 summary: gh-105499: typing: Remove an unused function (#131946) Leftove

[Python-checkins] gh-132002: Fix crash of `ContextVar` on unhashable `str` subtype (#132003)

https://github.com/python/cpython/commit/ab2a3dda1d3b6668162a847bf5b6aca2855a3416 commit: ab2a3dda1d3b6668162a847bf5b6aca2855a3416 branch: main author: sobolevn committer: sobolevn date: 2025-04-02T14:48:47+03:00 summary: gh-132002: Fix crash of `ContextVar` on unhashable `str` subtype (#132003)

[Python-checkins] gh-130167: Optimise ``textwrap.dedent()`` (#131919)

https://github.com/python/cpython/commit/6aa88a2cb36240fe2b587f2e82043873270a27cf commit: 6aa88a2cb36240fe2b587f2e82043873270a27cf branch: main author: Adam Turner <9087854+aa-tur...@users.noreply.github.com> committer: AA-Turner <9087854+aa-tur...@users.noreply.github.com> date: 2025-03-31T00:35:1

[Python-checkins] gh-131938: Update exception message for `Element.remove()` when an element is not found (#131972)

https://github.com/python/cpython/commit/04bc681e7cf5b7effd99e676b7deceb27fb34434 commit: 04bc681e7cf5b7effd99e676b7deceb27fb34434 branch: main author: Bénédikt Tran <10796600+picn...@users.noreply.github.com> committer: picnixz <10796600+picn...@users.noreply.github.com> date: 2025-04-04T15:04:07Z

[Python-checkins] [3.12] gh-89039: Call subclass constructors in datetime.*.replace (GH-114780) (GH-131239)

https://github.com/python/cpython/commit/6f6b8b4ac95ac1921acc912ac28c5ddca83b927e commit: 6f6b8b4ac95ac1921acc912ac28c5ddca83b927e branch: 3.12 author: Serhiy Storchaka committer: serhiy-storchaka date: 2025-04-02T20:35:16+03:00 summary: [3.12] gh-89039: Call subclass constructors in datetime.*.

[Python-checkins] [3.13] gh-130115: fix thread identifiers for 32-bit musl (GH-130391) (GH-132089)

https://github.com/python/cpython/commit/240c200ccef9ad31dea3977d70d3ab4177a1212d commit: 240c200ccef9ad31dea3977d70d3ab4177a1212d branch: 3.13 author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com> committer: pitrou date: 2025-04-04T22:57:35+02:00 summary: [3.13] gh-1301

[Python-checkins] gh-128632: fix segfault on nested __classdict__ type param (#128744)

https://github.com/python/cpython/commit/891c61c1fa480928dd60cce8bbc8764630c95025 commit: 891c61c1fa480928dd60cce8bbc8764630c95025 branch: main author: Tomasz Pytel committer: JelleZijlstra date: 2025-04-04T06:23:35-07:00 summary: gh-128632: fix segfault on nested __classdict__ type param (#1287