[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by Eric V. Smith : -- assignee: -> eric.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https:/

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by Eric V. Smith : -- keywords: +3.8regression, 3.9regression -patch resolution: fixed -> stage: resolved -> needs patch status: closed -> open ___ Python tracker ___ _

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Eric V. Smith added the comment: Hmm. I think maybe the intent was that if you're frozen, treat all the fields as frozen, including ones you inherit, regardless if the base classes are frozen or not. -- ___ Python tracker

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Ulrich Petri added the comment: @eric.smith Sure, here you go: dataclass_empty.py: ``` from dataclasses import dataclass @dataclass class A: pass @dataclass(frozen=True) class B(A): x: int print("42") ``` Running this on < 3.8.10: ``` $ ~/.pythonz/pythons/CPython-3.8.1/bin/pytho

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Eric V. Smith added the comment: Can you provide a small snippet of code showing the kind of thing that broke? -- ___ Python tracker ___ __

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Ulrich Petri added the comment: Wether the original behaviour was intentional or not this change introduces backwards incompatibility (and in our case, breakage) between 3.8.10 and previous releases (I expect the same to be true for the equivalent 3.9 releases). -- nosy: +ulope ___

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Eric V. Smith added the comment: New changeset 2df971afd5f29574be3bb44f2d8569cc240b800d by Miss Islington (bot) in branch '3.9': Fix blurb for bpo-43176. (GH-25215) (GH-25217) https://github.com/python/cpython/commit/2df971afd5f29574be3bb44f2d8569cc240b800d -- _

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

miss-islington added the comment: New changeset 76c4a9fb8ae370901b387a4edb609295bcc159e7 by Miss Islington (bot) in branch '3.8': [3.8] Fix blurb for bpo-43176. (GH-25215) (GH-25218) https://github.com/python/cpython/commit/76c4a9fb8ae370901b387a4edb609295bcc159e7 -- __

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Eric V. Smith added the comment: New changeset 1744c96ebc98b240f2564f75191097704b37244f by Eric V. Smith in branch 'master': Fix blurb for bpo-43176. (GH-25215) https://github.com/python/cpython/commit/1744c96ebc98b240f2564f75191097704b37244f --

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by miss-islington : -- pull_requests: +23956 pull_request: https://github.com/python/cpython/pull/25218 ___ Python tracker ___ __

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by miss-islington : -- pull_requests: +23955 pull_request: https://github.com/python/cpython/pull/25217 ___ Python tracker ___ __

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by Eric V. Smith : -- pull_requests: +23953 pull_request: https://github.com/python/cpython/pull/25215 ___ Python tracker ___ ___

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Eric V. Smith added the comment: New changeset 8a34a0793bcb830350dac675524310bb285e5e4f by Miss Islington (bot) in branch '3.9': bpo-43176: Fix processing of empty dataclasses (GH-24484) (GH-25205) https://github.com/python/cpython/commit/8a34a0793bcb830350dac675524310bb285e5e4f --

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Eric V. Smith added the comment: Thanks! -- resolution: -> fixed stage: patch review -> resolved status: open -> closed versions: -Python 3.6, Python 3.7 ___ Python tracker

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

miss-islington added the comment: New changeset b132be8b43afa739b7eda271b82711d64a83da4f by Miss Islington (bot) in branch '3.8': bpo-43176: Fix processing of empty dataclasses (GH-24484) https://github.com/python/cpython/commit/b132be8b43afa739b7eda271b82711d64a83da4f -- _

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by miss-islington : -- pull_requests: +23945 pull_request: https://github.com/python/cpython/pull/25206 ___ Python tracker ___ __

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by miss-islington : -- keywords: +patch pull_requests: +23944 stage: -> patch review pull_request: https://github.com/python/cpython/pull/25205 ___ Python tracker ___ _

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

miss-islington added the comment: New changeset 376ffc6ac491da74920aed1b8e35bc371cb766ac by Iurii Kemaev in branch 'master': bpo-43176: Fix processing of empty dataclasses (GH-24484) https://github.com/python/cpython/commit/376ffc6ac491da74920aed1b8e35bc371cb766ac -- nosy: +miss-isl

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

Change by Karthikeyan Singaravelan : -- nosy: +eric.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: htt

[issue43176] Dataclasses derived from empty frozen bases skip immutability checks

New submission from Iurii Kemaev : Dataclasses derived from empty frozen bases skip immutability checks. Repro snippet: ``` import dataclasses @dataclasses.dataclass(frozen=True) class Base: pass @dataclasses.dataclass class Derived(Base): a: int d = Derived(2) # OK ``` Usecase: someti