Generate dataclasses __hash__ according to runtime semantics

[sterliakov]

Fixes #18962

[sterliakov]

And this is funny! I think it makes some sense to add an exception to allow overriding __hash__ = None with a method in subclasses, but this actually reveals some bugs. mitmproxy uses ABC to ensure subclass is hashable, then violate it with @dataclass setting __hash__ = None. Same for strawberry and inherited __hash__ implementation overridden with None by dataclass decorator.

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

pydantic (https://github.com/pydantic/pydantic)
- pydantic/_internal/_model_construction.py:510: error: Cannot assign to a method  [method-assign]

strawberry (https://github.com/strawberry-graphql/strawberry)
+ strawberry/types/base.py:248: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ strawberry/types/scalar.py:38: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]

steam.py (https://github.com/Gobot1234/steam.py)
+ steam/reaction.py:204: error: Signature of "__hash__" incompatible with supertype "PartialMessageReaction"  [override]
+ steam/reaction.py:204: note:      Superclass:
+ steam/reaction.py:204: note:          None
+ steam/reaction.py:204: note:      Subclass:
+ steam/reaction.py:204: note:          def __hash__(self) -> int
+ steam/manifest.py:660: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ steam/chat.py:368: error: Signature of "__hash__" incompatible with supertype "Channel"  [override]
+ steam/chat.py:368: note:      Superclass:
+ steam/chat.py:368: note:          None
+ steam/chat.py:368: note:      Subclass:
+ steam/chat.py:368: note:          def __hash__(self) -> int
+ steam/chat.py:368: note:      Superclass:
+ steam/chat.py:368: note:          None
+ steam/chat.py:368: note:      Subclass:
+ steam/chat.py:368: note:          def __hash__(self) -> int
+ steam/channel.py:51: error: Signature of "__hash__" incompatible with supertype "Channel"  [override]
+ steam/channel.py:51: note:      Superclass:
+ steam/channel.py:51: note:          None
+ steam/channel.py:51: note:      Subclass:
+ steam/channel.py:51: note:          def __hash__(self) -> int
+ steam/ext/csgo/backpack.py:273: error: Definition of "__hash__" in base class "Asset" is incompatible with definition in base class "_BaseInspectedItem"  [misc]

schemathesis (https://github.com/schemathesis/schemathesis)
+ src/schemathesis/engine/events.py: note: In member "__hash__" of class "NonFatalError":
+ src/schemathesis/engine/events.py:216: error: Signature of "__hash__" incompatible with supertype "EngineEvent"  [override]
+ src/schemathesis/engine/events.py:216: note:      Superclass:
+ src/schemathesis/engine/events.py:216: note:          None
+ src/schemathesis/engine/events.py:216: note:      Subclass:
+ src/schemathesis/engine/events.py:216: note:          def __hash__(self) -> int

meson (https://github.com/mesonbuild/meson)
+ mesonbuild/mparser.py:264: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:264: note:      Superclass:
+ mesonbuild/mparser.py:264: note:          None
+ mesonbuild/mparser.py:264: note:      Subclass:
+ mesonbuild/mparser.py:264: note:          def __hash__() -> int
+ mesonbuild/mparser.py:279: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:279: note:      Superclass:
+ mesonbuild/mparser.py:279: note:          None
+ mesonbuild/mparser.py:279: note:      Subclass:
+ mesonbuild/mparser.py:279: note:          def __hash__() -> int
+ mesonbuild/mparser.py:296: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:296: note:      Superclass:
+ mesonbuild/mparser.py:296: note:          None
+ mesonbuild/mparser.py:296: note:      Subclass:
+ mesonbuild/mparser.py:296: note:          def __hash__() -> int
+ mesonbuild/mparser.py:307: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:307: note:      Superclass:
+ mesonbuild/mparser.py:307: note:          None
+ mesonbuild/mparser.py:307: note:      Subclass:
+ mesonbuild/mparser.py:307: note:          def __hash__() -> int
+ mesonbuild/mparser.py:336: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:336: note:      Superclass:
+ mesonbuild/mparser.py:336: note:          None
+ mesonbuild/mparser.py:336: note:      Subclass:
+ mesonbuild/mparser.py:336: note:          def __hash__() -> int
+ mesonbuild/mparser.py:388: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:388: note:      Superclass:
+ mesonbuild/mparser.py:388: note:          None
+ mesonbuild/mparser.py:388: note:      Subclass:
+ mesonbuild/mparser.py:388: note:          def __hash__() -> int
+ mesonbuild/mparser.py:401: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:401: note:      Superclass:
+ mesonbuild/mparser.py:401: note:          None
+ mesonbuild/mparser.py:401: note:      Subclass:
+ mesonbuild/mparser.py:401: note:          def __hash__() -> int
+ mesonbuild/mparser.py:417: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:417: note:      Superclass:
+ mesonbuild/mparser.py:417: note:          None
+ mesonbuild/mparser.py:417: note:      Subclass:
+ mesonbuild/mparser.py:417: note:          def __hash__() -> int
+ mesonbuild/mparser.py:436: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:436: note:      Superclass:
+ mesonbuild/mparser.py:436: note:          None
+ mesonbuild/mparser.py:436: note:      Subclass:
+ mesonbuild/mparser.py:436: note:          def __hash__() -> int
+ mesonbuild/mparser.py:445: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:445: note:      Superclass:
+ mesonbuild/mparser.py:445: note:          None
+ mesonbuild/mparser.py:445: note:      Subclass:
+ mesonbuild/mparser.py:445: note:          def __hash__() -> int
+ mesonbuild/mparser.py:455: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:455: note:      Superclass:
+ mesonbuild/mparser.py:455: note:          None
+ mesonbuild/mparser.py:455: note:      Subclass:
+ mesonbuild/mparser.py:455: note:          def __hash__() -> int
+ mesonbuild/mparser.py:472: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:472: note:      Superclass:
+ mesonbuild/mparser.py:472: note:          None
+ mesonbuild/mparser.py:472: note:      Subclass:
+ mesonbuild/mparser.py:472: note:          def __hash__() -> int
+ mesonbuild/mparser.py:491: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:491: note:      Superclass:
+ mesonbuild/mparser.py:491: note:          None
+ mesonbuild/mparser.py:491: note:      Subclass:
+ mesonbuild/mparser.py:491: note:          def __hash__() -> int
+ mesonbuild/mparser.py:506: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:506: note:      Superclass:
+ mesonbuild/mparser.py:506: note:          None
+ mesonbuild/mparser.py:506: note:      Subclass:
+ mesonbuild/mparser.py:506: note:          def __hash__() -> int
+ mesonbuild/mparser.py:525: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:525: note:      Superclass:
+ mesonbuild/mparser.py:525: note:          None
+ mesonbuild/mparser.py:525: note:      Subclass:
+ mesonbuild/mparser.py:525: note:          def __hash__() -> int
+ mesonbuild/mparser.py:540: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:540: note:      Superclass:
+ mesonbuild/mparser.py:540: note:          None
+ mesonbuild/mparser.py:540: note:      Subclass:
+ mesonbuild/mparser.py:540: note:          def __hash__() -> int
+ mesonbuild/mparser.py:556: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:556: note:      Superclass:
+ mesonbuild/mparser.py:556: note:          None
+ mesonbuild/mparser.py:556: note:      Subclass:
+ mesonbuild/mparser.py:556: note:          def __hash__() -> int
+ mesonbuild/mparser.py:578: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:578: note:      Superclass:
+ mesonbuild/mparser.py:578: note:          None
+ mesonbuild/mparser.py:578: note:      Subclass:
+ mesonbuild/mparser.py:578: note:          def __hash__() -> int
+ mesonbuild/mparser.py:591: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:591: note:      Superclass:
+ mesonbuild/mparser.py:591: note:          None
+ mesonbuild/mparser.py:591: note:      Subclass:
+ mesonbuild/mparser.py:591: note:          def __hash__() -> int
+ mesonbuild/mparser.py:602: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:602: note:      Superclass:
+ mesonbuild/mparser.py:602: note:          None
+ mesonbuild/mparser.py:602: note:      Subclass:
+ mesonbuild/mparser.py:602: note:          def __hash__() -> int
+ mesonbuild/mparser.py:614: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:614: note:      Superclass:
+ mesonbuild/mparser.py:614: note:          None
+ mesonbuild/mparser.py:614: note:      Subclass:
+ mesonbuild/mparser.py:614: note:          def __hash__() -> int
+ mesonbuild/mparser.py:629: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:629: note:      Superclass:
+ mesonbuild/mparser.py:629: note:          None
+ mesonbuild/mparser.py:629: note:      Subclass:
+ mesonbuild/mparser.py:629: note:          def __hash__() -> int
+ mesonbuild/mparser.py:647: error: Signature of "__hash__" incompatible with supertype "BaseNode"  [override]
+ mesonbuild/mparser.py:647: note:      Superclass:
+ mesonbuild/mparser.py:647: note:          None
+ mesonbuild/mparser.py:647: note:      Subclass:
+ mesonbuild/mparser.py:647: note:          def __hash__() -> int
+ mesonbuild/backend/backends.py:310:49: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | BuildTarget | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:319:53: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "BuildTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:357:45: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "SharedLibrary"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:359:45: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "StaticLibrary"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:363:45: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:366:49: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "Executable"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:384:89: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "Target"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:385:89: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "Target"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:390:42: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "Target"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:413:53: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:505:53: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "ExtractedObjects"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:811:83: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "SharedLibrary | StaticLibrary"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:825:80: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "BuildTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:902:54: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "BuildTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:902:69: error: Argument 2 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | CustomTargetIndex | GeneratedList"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1186:54: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "SharedLibrary | StaticLibrary"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1213:89: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "BuildTarget | CustomTarget | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1218:57: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "BuildTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1324:42: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "Target | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1466:62: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1475:77: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1531:36: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "Target | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1804:75: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "SharedLibrary | Executable"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1817:62: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "BuildTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1837:66: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:1849:62: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/backend/backends.py:2029:87: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | BuildTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/interpreter/interpreterobjects.py:961:56: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "BuildTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/modules/windows.py:122:124: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget"; expected "Hashable"  [arg-type]
+ mesonbuild/modules/gnome.py:628:99: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "SharedLibrary"; expected "Hashable"  [arg-type]
+ mesonbuild/modules/gnome.py:948:86: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/modules/gnome.py:1517:84: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | CustomTargetIndex"; expected "Hashable"  [arg-type]
+ mesonbuild/modules/_qt.py:754:92: error: Argument 1 to "__call__" of "_lru_cache_wrapper" has incompatible type "CustomTarget | CustomTargetIndex"; expected "Hashable"  [arg-type]

ibis (https://github.com/ibis-project/ibis)
+ ibis/expr/datatypes/core.py:160: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/selectors.py:36: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/schema.py:25: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/rules.py:141: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/operations/core.py:21: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/operations/relations.py:391: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/rewrites.py:29: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/rewrites.py:58: error: Type argument "Value[Any, Any]" of "FrozenDict" must be a subtype of "Hashable"  [type-var]
+ ibis/expr/rewrites.py:61: error: Type argument "Value[Any, Any]" of "FrozenDict" must be a subtype of "Hashable"  [type-var]
+ ibis/selectors.py:432: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/selectors.py:529: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/selectors.py:639: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/builders.py:23: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/examples/__init__.py:20: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/examples/__init__.py:86: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/api.py:2246: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/types/temporal_windows.py:20: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/expr/types/groupby.py:37: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds_benchmarks.py:12: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_graph_benchmarks.py:15: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_graph.py:208: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_graph.py:214: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_graph.py:217: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_graph.py:220: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_graph.py:246: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_egraph.py:123: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_egraph.py:158: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_egraph.py:175: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_egraph.py:191: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_egraph.py:195: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_egraph.py:211: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:81: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:91: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:95: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:99: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:109: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:142: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:196: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:631: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:648: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:1047: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ibis/common/tests/test_grounds.py:1050: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]

jax (https://github.com/google/jax)
+ jax/_src/pallas/mosaic/core.py:154: error: Signature of "__hash__" incompatible with supertype "GridSpec"  [override]
+ jax/_src/pallas/mosaic/core.py:154: note:      Superclass:
+ jax/_src/pallas/mosaic/core.py:154: note:          None
+ jax/_src/pallas/mosaic/core.py:154: note:      Subclass:
+ jax/_src/pallas/mosaic/core.py:154: note:          def __hash__() -> int

dd-trace-py (https://github.com/DataDog/dd-trace-py)
+ ddtrace/debugging/_probe/model.py:204: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:209: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:261: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:267: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:278: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:306: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:311: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:322: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]
+ ddtrace/debugging/_probe/model.py:327: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]

mitmproxy (https://github.com/mitmproxy/mitmproxy)
- mitmproxy/connection.py:175: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/connection.py:263: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]

pytest (https://github.com/pytest-dev/pytest)
+ testing/python/metafunc.py:50: error: Incompatible override of '__hash__': dataclasses without 'frozen' or 'unsafe_hash' have '__hash__' set to None  [override]