Typecheck unreachable code

[A5rocks]

Mypy doesn't typecheck unreachable code and this is surprising to many. This is an attempt at fixing that. It's a draft until:

• I list out the issues fixed
• I fix the bugs raised by the test cases
• I get feedback that this is fine
• I put this behind a flag (we can bundle this in --strict maybe and hopefully enable it by default in 2.0)

Problem areas based on test cases:

• currently we use None for unreachable type maps but we want to know what is unreachable to mark it as Never
  • it doesn't seem too bad to mark unreachability based on if a variable has a Never type
• analyzing a function multiple times for type var values
  • I think I can disable this new behavior based on if we're in a function like that?
• reporting unreachability multiple times (block in a block)
  • blocks could store unreachability report status
• exports could change (see check-incremental.test's changes)
  • I think this is fine?
• Never doesn't support operations (e.g. <Never>.f(), <Never> > 5)
  • it should return Never for these, I think?

Also maybe reveal_type(<Never>) should be non-trivial.

Generally I tried enabling --warn-unreachable in a test case if it looked like people were relying on un-checked unreachable code as a test. Also obviously many of the test case changes are wrong I just did not have the energy to fix all the bugs (and honestly maybe should think through the two things above -- the first especially was a source of issues).

I also have no clue what mypyc does so the test change there could be awful.

[github-actions]

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

kornia (https://github.com/kornia/kornia)
+ kornia/feature/lightglue.py:580: error: "None" has no attribute "__iter__" (not iterable)  [attr-defined]
+ kornia/x/trainers.py:126: error: Need type annotation for "a"  [var-annotated]
+ kornia/x/trainers.py:127: error: Need type annotation for "a"  [var-annotated]
+ kornia/x/trainers.py:128: error: Need type annotation for "a"  [var-annotated]
+ kornia/x/trainers.py:129: error: Need type annotation for "a"  [var-annotated]
+ kornia/x/trainers.py:130: error: Need type annotation for "a"  [var-annotated]
+ kornia/contrib/models/sam/model.py:212: error: "SamConfig" has no attribute "num_heads"  [attr-defined]

mitmproxy (https://github.com/mitmproxy/mitmproxy)
+ mitmproxy/net/http/validate.py:131: error: Argument 1 to "assert_never" has incompatible type "Literal['chunked', 'compress,chunked', 'deflate,chunked', 'gzip,chunked', 'compress', 'deflate', 'gzip', 'identity']"; expected "Never"  [arg-type]
+ mitmproxy/net/http/http1/read.py:126: error: Argument 1 to "assert_never" has incompatible type "Literal['chunked', 'compress,chunked', 'deflate,chunked', 'gzip,chunked', 'compress', 'deflate', 'gzip', 'identity']"; expected "Never"  [arg-type]
+ mitmproxy/contentviews/__init__.py:200: error: "None" not callable  [misc]

pyinstrument (https://github.com/joerick/pyinstrument)
+ pyinstrument/processors.py:167: error: Incompatible types in assignment (expression has type "float", variable has type "Never")  [assignment]

ignite (https://github.com/pytorch/ignite)
+ ignite/engine/engine.py:246: error: Argument 1 to "append" of "list" has incompatible type "list[str] | list[EventEnum]"; expected "EventEnum"  [arg-type]
+ ignite/engine/engine.py:248: error: Invalid index type "list[str] | list[EventEnum]" for "dict[str | Events | CallableEventWithFilter, str]"; expected type "str | Events | CallableEventWithFilter"  [index]
+ ignite/handlers/param_scheduler.py:1179: error: Argument 1 to "ConcatScheduler" has incompatible type "list[ParamScheduler | ParamGroupScheduler | Any]"; expected "list[ParamScheduler]"  [arg-type]
+ ignite/handlers/param_scheduler.py:1188: error: Argument "schedulers" to "simulate_values" of "ConcatScheduler" has incompatible type "list[ParamScheduler | ParamGroupScheduler | Any]"; expected "list[ParamScheduler]"  [arg-type]
+ ignite/handlers/lr_finder.py:103: error: Unsupported operand types for * ("int" and "None")  [operator]
+ ignite/handlers/lr_finder.py:103: error: Unsupported operand types for * ("None" and "int")  [operator]
+ ignite/handlers/lr_finder.py:103: error: Unsupported left operand type for * ("None")  [operator]
+ ignite/handlers/lr_finder.py:103: note: Both left and right operands are unions

Expression (https://github.com/cognitedata/Expression)
+ expression/core/option.py:100: error: Missing return statement  [return]
+ README.py:484: error: Incompatible types in assignment (expression has type "range", variable has type "Seq[int]")  [assignment]

manticore (https://github.com/trailofbits/manticore)
+ tests/wasm_sym/json2smc.py:95: error: Need type annotation for "modules" (hint: "modules: list[<type>] = ...")  [var-annotated]
+ tests/wasm/json2mc.py:65: error: Need type annotation for "imports" (hint: "imports: list[<type>] = ...")  [var-annotated]
+ manticore/wasm/types.py:56: error: Unused "type: ignore" comment  [unused-ignore]
+ manticore/platforms/wasm.py:262: error: Incompatible types in assignment (expression has type "HostFunc", variable has type "FuncAddr | TableAddr | MemAddr | GlobalAddr | None")  [assignment]
+ manticore/native/cpu/abstractcpu.py:693: error: Incompatible types in assignment (expression has type "bool", variable has type "Never")  [assignment]
+ manticore/native/cpu/abstractcpu.py:695: error: Incompatible types in assignment (expression has type "int", variable has type "Never")  [assignment]

aiortc (https://github.com/aiortc/aiortc)
+ src/aiortc/jitterbuffer.py:66: error: Need type annotation for "packets" (hint: "packets: list[<type>] = ...")  [var-annotated]
+ src/aiortc/rtcicetransport.py:100: error: Need type annotation for "uris"  [var-annotated]
+ src/aiortc/rtcicetransport.py:102: error: Incompatible types in assignment (expression has type "list[str]", variable has type "Never")  [assignment]
+ src/aiortc/rtcicetransport.py:104: error: Need type annotation for "uri"  [var-annotated]

optuna (https://github.com/optuna/optuna)
+ optuna/importance/_base.py:96: error: Item "None" of "dict[str, BaseDistribution] | None" has no attribute "items"  [union-attr]

altair (https://github.com/vega/altair)
+ tools/schemapi/codegen.py:153: error: Set comprehension has incompatible type Set[set[str]]; expected Set[str]  [misc]
+ tools/schemapi/codegen.py:154: error: Set comprehension has incompatible type Set[set[str]]; expected Set[str]  [misc]
+ tools/schemapi/codegen.py:156: error: Set comprehension has incompatible type Set[set[str]]; expected Set[str]  [misc]

poetry (https://github.com/python-poetry/poetry)
+ src/poetry/utils/helpers.py:307: error: Module has no attribute "OpenKey"  [attr-defined]
+ src/poetry/utils/helpers.py:308: error: Module has no attribute "HKEY_CURRENT_USER"  [attr-defined]
+ src/poetry/utils/helpers.py:311: error: Module has no attribute "QueryValueEx"  [attr-defined]
+ src/poetry/utils/helpers.py:331: error: Module has no attribute "windll"  [attr-defined]
+ src/poetry/utils/helpers.py:342: error: Module has no attribute "windll"  [attr-defined]

hydpy (https://github.com/hydpy-dev/hydpy)
+ hydpy/exe/xmltools.py:2351: error: Unexpected keyword argument "base" for "SetItem"  [call-arg]
+ hydpy/core/itemtools.py:972: note: "SetItem" defined here
+ hydpy/exe/xmltools.py:2351: error: Unexpected keyword argument "base" for "SetItem"  [call-arg]
+ hydpy/core/itemtools.py:972: note: "SetItem" defined here
+ hydpy/exe/xmltools.py:2360: error: Unexpected keyword argument "keyword" for <subclass of "hydpy.core.itemtools.AddItem" and "hydpy.core.itemtools.SetItem">  [call-arg]
+ hydpy/core/itemtools.py:1401: note: <subclass of "hydpy.core.itemtools.AddItem" and "hydpy.core.itemtools.SetItem"> defined here
+ hydpy/exe/xmltools.py:2360: error: Unexpected keyword argument "keyword" for <subclass of "hydpy.core.itemtools.MultiplyItem" and "hydpy.core.itemtools.SetItem">  [call-arg]
+ hydpy/core/itemtools.py:1401: note: <subclass of "hydpy.core.itemtools.MultiplyItem" and "hydpy.core.itemtools.SetItem"> defined here
+ hydpy/core/optiontools.py:515: error: Argument 1 to "assert_never" has incompatible type "Literal['asc']"; expected "Never"  [arg-type]
+ hydpy/core/optiontools.py:584: error: Argument 1 to "assert_never" has incompatible type "Literal['mean']"; expected "Never"  [arg-type]
+ hydpy/core/optiontools.py:649: error: Argument 1 to "assert_never" has incompatible type "Literal['HydPy']"; expected "Never"  [arg-type]
+ hydpy/core/itemtools.py:424: error: Argument 1 to "assert_never" has incompatible type "Literal['subunit']"; expected "Never"  [arg-type]
+ hydpy/core/devicetools.py:2334: error: Argument 1 to "assert_never" has incompatible type "Literal['obs', 'obs_newsim', 'obs_oldsim', 'obs_bi', 'obs_oldsim_bi']"; expected "Never"  [arg-type]
+ hydpy/core/devicetools.py:2343: error: Argument 1 to "assert_never" has incompatible type "Literal['oldsim', 'obs_oldsim']"; expected "Never"  [arg-type]

werkzeug (https://github.com/pallets/werkzeug)
+ src/werkzeug/middleware/shared_data.py:139: error: Cannot assign to a method  [method-assign]
+ src/werkzeug/middleware/shared_data.py:139: error: Incompatible types in assignment (expression has type "Callable[[Arg(str, 'x')], bool]", variable has type "Callable[[Arg(str, 'filename')], bool]")  [assignment]
+ src/werkzeug/local.py:296: error: "Never" not callable  [misc]
+ tests/test_wrappers.py:729: error: Incompatible types in assignment (expression has type "str", variable has type "int")  [assignment]
+ tests/test_wrappers.py:741: error: Incompatible types in assignment (expression has type "int", variable has type "Optional[timedelta]")  [assignment]
+ tests/test_wrappers.py:981: error: Call to untyped function "generate_items" in typed context  [no-untyped-call]
+ tests/test_wrappers.py:997: error: Argument 1 to "write" of "ResponseStream" has incompatible type "str"; expected "bytes"  [arg-type]
+ tests/test_wrappers.py:998: error: Non-overlapping equality check (left operand type: "tuple[str, str]", right operand type: "list[str]")  [comparison-overlap]
+ tests/test_http.py:141: error: Incompatible types in assignment (expression has type "float", variable has type "Optional[int]")  [assignment]
+ tests/test_http.py:144: error: Incompatible types in assignment (expression has type "float", variable has type "Optional[int]")  [assignment]

steam.py (https://github.com/Gobot1234/steam.py)
+ steam/id.py:267: error: Incompatible return value type (implicitly returns "None", expected "str")  [return-value]
+ steam/tag.py:117: error: Yield value expected  [misc]
+ steam/abc.py:992: error: Yield value expected  [misc]
+ steam/ext/tf2/backpack.py:301: error: "BackpackItem[OwnerT]" has no attribute "elevated"  [attr-defined]
+ steam/ext/tf2/backpack.py:304: error: "BackpackItem[OwnerT]" has no attribute "killstreak"  [attr-defined]
+ steam/ext/tf2/backpack.py:305: error: "BackpackItem[OwnerT]" has no attribute "killstreak"  [attr-defined]
+ steam/ext/tf2/backpack.py:310: error: "BackpackItem[OwnerT]" has no attribute "festivized"; maybe "is_festivized"?  [attr-defined]
+ steam/ext/tf2/backpack.py:313: error: "BackpackItem[OwnerT]" has no attribute "craft_number"  [attr-defined]
+ steam/ext/tf2/backpack.py:314: error: "BackpackItem[OwnerT]" has no attribute "selfNumber"  [attr-defined]
+ steam/ext/tf2/backpack.py:316: error: "BackpackItem[OwnerT]" has no attribute "crate_number"  [attr-defined]
+ steam/ext/tf2/backpack.py:317: error: "BackpackItem[OwnerT]" has no attribute "selfNumber"  [attr-defined]
+ steam/ext/tf2/backpack.py:343: error: Incompatible return value type (got "BackpackItem[OwnerT]", expected "BackpackItem[None]")  [return-value]

PyGithub (https://github.com/PyGithub/PyGithub)
- github/GithubRetry.py:201: error: Unused "type: ignore" comment  [unused-ignore]
+ github/Team.py:293: error: Incompatible types in assignment (expression has type "str", variable has type "Repository")  [assignment]

aiohttp (https://github.com/aio-libs/aiohttp)
+ aiohttp/client_exceptions.py:339:19: error: Incompatible types in assignment (expression has type "tuple[Never, ...]", variable has type "tuple[type[SSLCertVerificationError]]")  [assignment]
+ aiohttp/client_exceptions.py:339:19: note: Error code "assignment" not covered by "type: ignore" comment
+ aiohttp/client_exceptions.py:340:25: error: Incompatible types in assignment (expression has type "tuple[type[ClientSSLError], type[ValueError]]", variable has type "tuple[type[ClientSSLError], type[SSLCertVerificationError]]")  [assignment]
+ aiohttp/client_exceptions.py:345:18: error: Incompatible types in assignment (expression has type "tuple[Never, ...]", variable has type "tuple[type[SSLError]]")  [assignment]
+ aiohttp/client_exceptions.py:346:23: error: Incompatible types in assignment (expression has type "tuple[type[ClientSSLError]]", variable has type "tuple[type[ClientSSLError], type[SSLError]]")  [assignment]
+ aiohttp/cookiejar.py:473:13: error: Incompatible types in "yield" (actual type "None", expected type "Morsel[str]")  [misc]
+ aiohttp/cookiejar.py:473:13: note: Error code "misc" not covered by "type: ignore" comment
+ aiohttp/multipart.py:319:13: error: Statement is unreachable  [unreachable]
+ aiohttp/multipart.py:319:13: note: See https://mypy.rtfd.io/en/stable/_refs.html#code-unreachable for more info
+ aiohttp/connector.py:773:16: error: Incompatible return value type (got "None", expected "SSLContext")  [return-value]
+ aiohttp/connector.py:773:16: note: Error code "return-value" not covered by "type: ignore" comment
+ aiohttp/client_reqrep.py:172:25: error: Incompatible types in assignment (expression has type "tuple[type[bool]]", variable has type "tuple[type[SSLContext], type[bool], type[Fingerprint]]")  [assignment]
+ aiohttp/client_reqrep.py:172:25: note: Error code "assignment" not covered by "type: ignore" comment

static-frame (https://github.com/static-frame/static-frame)
+ static_frame/core/util.py:3317: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3318: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3320: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3322: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3325: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3326: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3328: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3329: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3351: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3352: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3358: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3364: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3366: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3367: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3369: error: Statement is unreachable  [unreachable]
+ static_frame/core/util.py:3370: error: Statement is unreachable  [unreachable]
+ static_frame/core/index_datetime.py:141: error: Statement is unreachable  [unreachable]
+ static_frame/core/index_datetime.py:142: error: Statement is unreachable  [unreachable]
+ static_frame/core/index_datetime.py:144: error: Statement is unreachable  [unreachable]
+ static_frame/core/frame.py:5717: error: Unused "type: ignore" comment  [unused-ignore]
+ static_frame/test/test_case.py:89: error: Statement is unreachable  [unreachable]
+ static_frame/test/test_case.py:92: error: Statement is unreachable  [unreachable]

prefect (https://github.com/PrefectHQ/prefect)
+ src/prefect/settings/sources.py:115: error: "Never" object is not iterable  [misc]
+ src/prefect/settings/sources.py:116: error: Cannot determine type of "key"  [has-type]
+ src/prefect/settings/sources.py:116: error: Cannot determine type of "value"  [has-type]
+ src/prefect/settings/sources.py:118: error: Cannot determine type of "key"  [has-type]
+ src/prefect/settings/sources.py:118: error: Unsupported right operand type for in ("Optional[list[str]]")  [operator]
+ src/prefect/_internal/concurrency/cancellation.py:63: error: Need type annotation for "exc"  [var-annotated]
+ src/prefect/_internal/concurrency/cancellation.py:181: error: Unsupported left operand type for > ("None")  [operator]
+ src/prefect/server/database/dependencies.py:304: error: "Self" has no attribute "_func"  [attr-defined]
+ src/prefect/client/orchestration/__init__.py:319: error: Setting? has no attribute "value"  [attr-defined]
+ src/prefect/client/orchestration/__init__.py:809: error: Incompatible types in assignment (expression has type "int", variable has type "list[float]")  [assignment]
+ src/prefect/client/orchestration/__init__.py:1327: error: Setting? has no attribute "value"  [attr-defined]
+ src/prefect/client/orchestration/__init__.py:1605: error: Incompatible types in assignment (expression has type "int", variable has type "list[float]")  [assignment]
+ src/prefect/blocks/core.py:128: error: Need type annotation for "definition_key"  [var-annotated]
+ src/prefect/concurrency/v1/sync.py:61: error: Need type annotation for "limits"  [var-annotated]
+ src/prefect/concurrency/v1/sync.py:69: error: Value of type "Coroutine[Any, Any, R?]" must be used  [unused-coroutine]
+ src/prefect/concurrency/v1/sync.py:69: note: Are you missing an await?
- src/prefect/tasks.py:460: error: Incompatible types in assignment (expression has type "CachePolicy", variable has type "_None")  [assignment]
+ src/prefect/tasks.py:460: error: Incompatible types in assignment (expression has type "CachePolicy", variable has type "Optional[_None]")  [assignment]
- src/prefect/tasks.py:463: error: Incompatible types in assignment (expression has type "None", variable has type "_None")  [assignment]
- src/prefect/tasks.py:465: error: Incompatible types in assignment (expression has type "Union[CachePolicy, type[NotSet]]", variable has type "_None")  [assignment]
+ src/prefect/tasks.py:465: error: Incompatible types in assignment (expression has type "Union[CachePolicy, type[NotSet]]", variable has type "Optional[_None]")  [assignment]
+ src/prefect/tasks.py:672: error: Argument "cache_policy" to "Task" has incompatible type "Union[CachePolicy, type[NotSet], None]"; expected "Union[CachePolicy, type[NotSet]]"  [arg-type]
- src/prefect/server/models/deployments.py:740: error: "Never" has no attribute "model_dump"  [attr-defined]
+ src/prefect/workers/base.py:650: error: Setting? has no attribute "value"  [attr-defined]
+ src/prefect/input/run_input.py:553: error: Incompatible return value type (got "Coroutine[Any, Any, R?]", expected "Union[T, AutomaticRunInput[T]]")  [return-value]
+ src/prefect/flow_runs.py:296: error: "T" has no attribute "load"  [attr-defined]
+ src/prefect/flow_runs.py:297: error: Return value expected  [return-value]
- src/prefect/cli/deploy.py:878: error: Need type annotation for "active_workers" (hint: "active_workers: list[<type>] = ...")  [var-annotated]

pandas (https://github.com/pandas-dev/pandas)
+ pandas/core/dtypes/dtypes.py:480: error: Incompatible types in assignment (expression has type "dtype[Any] | ExtensionDtype", variable has type "str")  [assignment]
+ pandas/core/arrays/categorical.py:453: error: Item "ExtensionArray" of "ExtensionArray | ndarray[Any, Any]" has no attribute "_pa_array"  [union-attr]
+ pandas/core/arrays/categorical.py:453: error: Item "ndarray[Any, Any]" of "ExtensionArray | ndarray[Any, Any]" has no attribute "_pa_array"  [union-attr]
+ pandas/io/pytables.py:2077: error: Value of type "None" is not indexable  [index]
- pandas/io/parsers/c_parser_wrapper.py:123: error: Cannot determine type of "names"  [has-type]
+ pandas/io/parsers/c_parser_wrapper.py:111: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:122: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:134: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:148: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:150: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:153: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:158: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:162: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:166: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:170: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:179: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:183: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:216: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:216: error: Item "None" of "Sequence[Hashable] | None" has no attribute "__iter__" (not iterable)  [union-attr]
+ pandas/io/parsers/c_parser_wrapper.py:216: note: Error code "union-attr" not covered by "type: ignore" comment
+ pandas/io/parsers/c_parser_wrapper.py:220: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:220: error: Argument 2 to "_set_noconvert_dtype_columns" of "ParserBase" has incompatible type "Sequence[Hashable] | None"; expected "Sequence[Hashable]"  [arg-type]
+ pandas/io/parsers/c_parser_wrapper.py:220: note: Error code "arg-type" not covered by "type: ignore" comment
+ pandas/io/parsers/c_parser_wrapper.py:239: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:239: error: Argument 2 to "_concatenate_chunks" has incompatible type "Sequence[Hashable] | None"; expected "list[str]"  [arg-type]
+ pandas/io/parsers/c_parser_wrapper.py:239: note: Error code "arg-type" not covered by "type: ignore" comment
+ pandas/io/parsers/c_parser_wrapper.py:274: error: Unused "type: ignore" comment  [unused-ignore]
+ pandas/io/parsers/c_parser_wrapper.py:274: error: Incompatible types in assignment (expression has type "Sequence[Hashable] | None", variable has type "Sequence[Hashable]")  [assignment]
+ pandas/io/parsers/c_parser_wrapper.py:274: note: Error code "assignment" not covered by "type: ignore" comment
+ pandas/core/generic.py:4645: error: "ndarray[tuple[int, ...], dtype[numpy.bool[builtins.bool]]]" has no attribute "to_numpy"  [attr-defined]
+ pandas/core/frame.py:11541: error: Item "ndarray[Any, Any]" of "ExtensionArray | ndarray[Any, Any]" has no attribute "_reduce"  [union-attr]
+ pandas/core/window/ewm.py:1069: error: Value of type "None" is not indexable  [index]
+ pandas/core/tools/datetimes.py:1056: error: Incompatible types in assignment (expression has type "bool", variable has type "Timestamp | NaTType | Series | Index")  [assignment]
+ pandas/core/internals/managers.py:234: error: "BaseBlockManager" has no attribute "_rebuild_blknos_and_blklocs"  [attr-defined]
+ pandas/core/internals/managers.py:245: error: "BaseBlockManager" has no attribute "_rebuild_blknos_and_blklocs"  [attr-defined]
+ pandas/core/internals/construction.py:903: error: Need type annotation for "col"  [var-annotated]
+ pandas/core/reshape/reshape.py:493: error: Need type annotation for "unstcols"  [var-annotated]
+ pandas/core/reshape/reshape.py:495: error: Incompatible types in assignment (expression has type "Index", variable has type "Never")  [assignment]
+ pandas/core/reshape/reshape.py:501: error: Generator has incompatible item type "signedinteger[_32Bit | _64Bit]"; expected "ndarray[tuple[int, ...], dtype[signedinteger[_32Bit | _64Bit]]]"  [misc]
+ pandas/core/reshape/reshape.py:508: error: Incompatible types in assignment (expression has type "MultiIndex", variable has type "Never")  [assignment]
+ pandas/core/reshape/reshape.py:966: error: Incompatible types in assignment (expression has type "list[Any]", variable has type "FrozenList")  [assignment]
+ pandas/core/reshape/reshape.py:967: error: Incompatible types in assignment (expression has type "list[ndarray[Any, Any]]", variable has type "FrozenList")  [assignment]
- pandas/io/formats/style.py:1901: error: "Never" has no attribute "shape"  [attr-defined]
- pandas/io/formats/style.py:1904: error: "Never" has no attribute "shape"  [attr-defined]

anyio (https://github.com/agronholm/anyio)
+ src/anyio/to_interpreter.py:189: error: Argument 2 to "call" of "Worker" has incompatible type "tuple[*PosArgsT]"; expected "tuple[Any]"  [arg-type]

jinja (https://github.com/pallets/jinja)
+ src/jinja2/runtime.py:903: error: Statement is unreachable  [unreachable]

psycopg (https://github.com/psycopg/psycopg)
+ psycopg/psycopg/_conninfo_attempts_async.py:96: error: Incompatible types in assignment (expression has type "list[tuple[AddressFamily, SocketKind, int, str, tuple[str, int] | tuple[str, int, int, int] | tuple[int, bytes]]]", variable has type "list[tuple[AddressFamily, SocketKind, int, str, tuple[str, int] | tuple[str, int, int, int]]]")  [assignment]
+ psycopg/psycopg/connection_async.py:39: error: Incompatible import of "Lock" (imported name has type "type[lock]", local name has type "type[Lock]")  [assignment]
+ psycopg/psycopg/connection_async.py:56: error: Incompatible types in assignment (expression has type "type[KeyboardInterrupt]", variable has type "tuple[type[CancelledError], type[KeyboardInterrupt]]")  [assignment]
+ psycopg/psycopg/connection_async.py:447: error: Value of type "Coroutine[Any, Any, None]" must be used  [unused-coroutine]
+ psycopg/psycopg/connection_async.py:447: note: Are you missing an await?
+ psycopg/psycopg/connection_async.py:458: error: Value of type "Coroutine[Any, Any, None]" must be used  [unused-coroutine]
+ psycopg/psycopg/connection_async.py:458: note: Are you missing an await?
+ psycopg/psycopg/connection_async.py:469: error: Value of type "Coroutine[Any, Any, None]" must be used  [unused-coroutine]
+ psycopg/psycopg/connection_async.py:469: note: Are you missing an await?
+ psycopg/psycopg/connection_async.py:480: error: Value of type "Coroutine[Any, Any, None]" must be used  [unused-coroutine]
+ psycopg/psycopg/connection_async.py:480: note: Are you missing an await?
+ tests/pq/test_pgconn.py:45: error: If x = b'abc' then f"{x}" or "{}".format(x) produces "b'abc'", not "abc". If this is desired behavior, use f"{x!r}" or "{!r}".format(x). Otherwise, decode the bytes  [str-bytes-safe]
+ tests/pool/test_sched_async.py:153: error: Incompatible types in assignment (expression has type "tuple[Any]", variable has type "tuple[()]")  [assignment]
+ psycopg_pool/psycopg_pool/pool_async.py:120: error: Expected iterable as variadic argument  [misc]
+ psycopg_pool/psycopg_pool/pool_async.py:120: error: Value of type "Coroutine[Any, Any, None]" must be used  [unused-coroutine]
+ psycopg_pool/psycopg_pool/pool_async.py:120: note: Are you missing an await?
+ psycopg_pool/psycopg_pool/pool_async.py:591: error: Value of type "Coroutine[Any, Any, AsyncCursor[Any]]" must be used  [unused-coroutine]
+ psycopg_pool/psycopg_pool/pool_async.py:591: note: Are you missing an await?
+ tests/types/test_enum.py:87: error: Need type annotation for "e"  [var-annotated]
+ tests/pool/test_pool_common_async.py:71: error: Incompatible types in assignment (expression has type "type[DeprecationWarning]", variable has type "type[RuntimeWarning]")  [assignment]

dulwich (https://github.com/dulwich/dulwich)
+ dulwich/refs.py:804: error: Unsupported right operand type for in ("None")  [operator]
+ dulwich/refs.py:807: error: "None" has no attribute "__delitem__"  [attr-defined]
+ dulwich/refs.py:809: error: "None" has no attribute "__delitem__"  [attr-defined]

antidote (https://github.com/Finistere/antidote)
+ tests/lib/injectable/test_injectable.py:121: error: Missing positional argument "x" in call to "method" of "MyService"  [call-arg]

mypy (https://github.com/python/mypy)
+ mypyc/ir/pprint.py:231: error: "PrimitiveOp" has no attribute "type_args"  [attr-defined]
+ mypyc/ir/pprint.py:232: error: "PrimitiveOp" has no attribute "type_args"  [attr-defined]

yarl (https://github.com/aio-libs/yarl)
+ yarl/_quoting_py.py:38:20: error: Incompatible return value type (got "None", expected "str")  [return-value]
+ yarl/_quoting_py.py:127:20: error: Incompatible return value type (got "None", expected "str")  [return-value]
+ yarl/_query.py:36:24: error: Argument 1 to "int" has incompatible type "Union[Union[str, int, float], Sequence[Union[str, int, float]]]"; expected "Union[str, Buffer, SupportsInt, SupportsIndex, SupportsTrunc]"  [arg-type]

urllib3 (https://github.com/urllib3/urllib3)
+ src/urllib3/util/ssl_.py:271: error: Argument 1 to "get" of "dict" has incompatible type "int | None"; expected "int"  [arg-type]
+ src/urllib3/util/ssl_.py:274: error: Argument 1 to "get" of "dict" has incompatible type "int | None"; expected "int"  [arg-type]
+ src/urllib3/util/ssl_.py:288: error: "None" not callable  [misc]
+ src/urllib3/util/ssl_.py:351: error: Returning Any from function declared to return "SSLContext"  [no-any-return]
+ src/urllib3/util/ssl_.py:501: error: "None" has no attribute "_validate_ssl_context_for_tls_in_tls"  [attr-defined]
+ src/urllib3/util/ssl_.py:502: error: Returning Any from function declared to return "SSLSocket | SSLTransport"  [no-any-return]
+ src/urllib3/util/ssl_.py:502: error: "None" not callable  [misc]
+ src/urllib3/contrib/emscripten/response.py:200: error: "None" has no attribute "_put_conn"  [attr-defined]
+ src/urllib3/contrib/emscripten/fetch.py:400: error: Argument 1 to "len" has incompatible type "Buffer"; expected "Sized"  [arg-type]
+ src/urllib3/contrib/emscripten/fetch.py:400: error: Argument 1 to "len" has incompatible type "None"; expected "Sized"  [arg-type]
+ src/urllib3/contrib/emscripten/fetch.py:402: error: Unsupported target for indexed assignment ("Buffer")  [index]
+ src/urllib3/contrib/emscripten/fetch.py:402: error: Value of type "None" is not indexable  [index]
+ src/urllib3/contrib/emscripten/fetch.py:406: error: Argument 1 to "len" has incompatible type "None"; expected "Sized"  [arg-type]
+ test/test_response.py:647: error: Incompatible types in assignment (expression has type "int", variable has type "HTTPResponse | None")  [assignment]
+ test/with_dummyserver/test_socketlevel.py:366: error: Need type annotation for "ssl_context"  [var-annotated]
+ test/with_dummyserver/test_socketlevel.py:385: error: Need type annotation for "context"  [var-annotated]
+ test/with_dummyserver/test_socketlevel.py:395: error: Need type annotation for "context"  [var-annotated]

pydantic (https://github.com/pydantic/pydantic)
+ pydantic/v1/typing.py:228: error: Incompatible return value type (got "GenericAlias", expected "type[Any]")  [return-value]
+ pydantic/v1/typing.py:398: error: Incompatible types in assignment (expression has type "ForwardRef", variable has type "type[Any]")  [assignment]
+ pydantic/v1/typing.py:400: error: Incompatible types in assignment (expression has type "ForwardRef", variable has type "type[Any]")  [assignment]
+ pydantic/v1/main.py:1084: error: Need type annotation for "extra"  [var-annotated]
+ pydantic/v1/main.py:1086: error: Incompatible types in assignment (expression has type "set[str]", variable has type "Never")  [assignment]
+ pydantic/v1/main.py:1090: error: Need type annotation for "f"  [var-annotated]
+ pydantic/fields.py:1054: error: Need type annotation for "k"  [var-annotated]

xarray (https://github.com/pydata/xarray)
+ xarray/core/npcompat.py: note: In function "isdtype":
+ xarray/core/npcompat.py:73: error: Argument 2 to "isinstance" has incompatible type "set[type | type[float64]]"; expected "_ClassInfo"  [arg-type]
+ xarray/core/indexes.py: note: In member "from_variables" of class "PandasIndex":
+ xarray/core/indexes.py:652: error: Need type annotation for "level"  [var-annotated]
+ xarray/core/indexes.py: note: At top level:
+ xarray/core/variable.py:899: error: Unused "type: ignore" comment  [unused-ignore]
+ xarray/core/variable.py:901: error: Unused "type: ignore" comment  [unused-ignore]
+ xarray/core/variable.py: note: In member "_pad_options_dim_to_index" of class "Variable":
+ xarray/core/variable.py:1118: error: Unsupported target for indexed assignment ("Mapping[Any, int | float | tuple[int, int] | tuple[float, float]]")  [index]
+ xarray/core/variable.py: note: At top level:
+ xarray/core/variable.py:2785: error: Unused "type: ignore" comment  [unused-ignore]
+ xarray/core/variable.py:2787: error: Unused "type: ignore" comment  [unused-ignore]
- xarray/core/computation.py: note: In function "apply_variable_ufunc":
- xarray/core/computation.py:848: error: "Never" has no attribute "ndim"  [attr-defined]
- xarray/core/computation.py:851: error: "Never" has no attribute "ndim"  [attr-defined]
+ xarray/coding/cftime_offsets.py: note: In function "date_range_like":
+ xarray/coding/cftime_offsets.py:1394: error: Left operand of "and" is always true  [redundant-expr]
+ xarray/core/groupby.py: note: In member "_flox_reduce" of class "GroupBy":
+ xarray/core/groupby.py:1001: error: "Never" object is not iterable  [misc]
+ xarray/core/groupby.py:1001: error: Cannot determine type of "k"  [has-type]
+ xarray/core/groupby.py:1001: error: Cannot determine type of "v"  [has-type]
+ xarray/core/groupby.py: note: At top level:
+ xarray/core/groupby.py:1002: error: Unused "type: ignore" comment  [unused-ignore]
+ xarray/core/dataset.py: note: In member "transpose" of class "Dataset":
+ xarray/core/dataset.py:6353: error: Need type annotation for "x"  [var-annotated]
+ xarray/core/dataset.py: note: At top level:
+ xarray/core/dataarray.py: note: In member "to_pandas" of class "DataArray":
+ xarray/core/dataarray.py:3919: error: Need type annotation for "values"  [var-annotated]
+ xarray/core/dataarray.py:3921: error: Incompatible types in assignment (expression has type "ndarray[Any, Any]", variable has type "Never")  [assignment]
+ xarray/core/dataarray.py: note: At top level:
- xarray/tests/test_variable.py: note: In function "test_datetime_conversion":
- xarray/tests/test_variable.py:3020: error: If condition is always true  [redundant-expr]
- xarray/tests/test_variable.py: note: At top level:
- xarray/tests/test_variable.py: note: In function "test_timedelta_conversion":
- xarray/tests/test_variable.py:3090: error: If condition is always true  [redundant-expr]

streamlit (https://github.com/streamlit/streamlit)
+ lib/streamlit/type_util.py: note: In function "to_bytes":
+ lib/streamlit/type_util.py:167:26: error: If x = b'abc' then f"{x}" or "{}".format(x) produces "b'abc'", not "abc". If this is desired behavior, use f"{x!r}" or "{!r}".format(x). Otherwise, decode the bytes  [str-bytes-safe]
+ lib/streamlit/runtime/state/session_state.py: note: In member "__getitem__" of class "WStates":
+ lib/streamlit/runtime/state/session_state.py:124:21: error: Item "None" of "Optional[Any]" has no attribute "data"  [union-attr]
+ lib/streamlit/runtime/state/session_state.py:126:32: error: Argument 1 to "loads" has incompatible type "Optional[Any]"; expected "Union[str, bytes, bytearray]"  [arg-type]
+ lib/streamlit/runtime/runtime.py: note: In member "_loop_coroutine" of class "Runtime":
+ lib/streamlit/runtime/runtime.py:641:25: error: Statement is unreachable  [unreachable]
+ lib/tests/streamlit/watcher/local_sources_watcher_test.py:264:17: error: Module "streamlit.watcher.local_sources_watcher" does not explicitly export attribute "get_default_path_watcher_class"  [attr-defined]
+ lib/tests/streamlit/stop_test.py:25:16: error: Item "None" of "Optional[ScriptRequests]" has no attribute "_state"  [union-attr]

spark (https://github.com/apache/spark)
+ python/pyspark/core/context.py:818: error: Unused "type: ignore" comment  [unused-ignore]
+ python/pyspark/core/context.py:819: error: Unused "type: ignore" comment  [unused-ignore]
+ python/pyspark/core/context.py:819: error: Need type annotation for "start0"  [var-annotated]
+ python/pyspark/core/context.py:819: note: Error code "var-annotated" not covered by "type: ignore" comment
+ python/pyspark/sql/types.py:1269: error: Incompatible types in assignment (expression has type "DataType | None", variable has type "DataType")  [assignment]
+ python/pyspark/sql/types.py:1301: error: Incompatible return value type (got "StructType", expected "StructField")  [return-value]
+ python/pyspark/sql/types.py:1301: error: Argument 1 to "StructType" has incompatible type "StructField"; expected "list[StructField] | None"  [arg-type]
+ python/pyspark/sql/types.py:1479: error: Return value expected  [return-value]
+ python/pyspark/sql/types.py:1497: error: Need type annotation for "d"  [var-annotated]
+ python/pyspark/sql/types.py:1523: error: Return value expected  [return-value]
+ python/pyspark/sql/readwriter.py:845: error: Function is missing a type annotation  [no-untyped-def]
+ python/pyspark/sql/readwriter.py:853: error: Need type annotation for "keyed"  [var-annotated]
+ python/pyspark/sql/readwriter.py:854: error: Incompatible types in assignment (expression has type "bool", variable has type "Never")  [assignment]
+ python/pyspark/sql/readwriter.py:855: error: Need type annotation for "jrdd"  [var-annotated]
+ python/pyspark/sql/readwriter.py:855: error: Item "None" of "Any | None" has no attribute "BytesToString"  [union-attr]
+ python/pyspark/sql/readwriter.py:861: error: Item "None" of "Any | None" has no attribute "Encoders"  [union-attr]
+ python/pyspark/sql/streaming/state.py:224: error: Incompatible types in assignment (expression has type "float", variable has type "int")  [assignment]
+ python/pyspark/sql/pandas/conversion.py:712: error: List comprehension has incompatible type List[TimestampType | None]; expected List[DataType]  [misc]
+ python/pyspark/sql/pandas/conversion.py:715: error: PandasDataFrameLike? has no attribute "dtypes"  [attr-defined]
+ python/pyspark/sql/session.py:1538: error: Need type annotation for "x"  [var-annotated]
+ python/pyspark/sql/session.py:1538: error: Incompatible types in assignment (expression has type "list[Never]", variable has type "AtomicType | StructType | str | None")  [assignment]
+ python/pyspark/sql/classic/dataframe.py:1609: error: "tuple[dict[str, Column]]" has no attribute "keys"  [attr-defined]
+ python/pyspark/sql/classic/dataframe.py:1610: error: "tuple[dict[str, Column]]" has no attribute "values"  [attr-defined]
+ python/pyspark/pandas/generic.py:484: error: "Never" object is not iterable  [misc]
+ python/pyspark/pandas/generic.py:485: error: Cannot determine type of "target"  [has-type]
+ python/pyspark/pandas/generic.py:486: error: Cannot determine type of "target"  [has-type]
+ python/pyspark/pandas/generic.py:487: error: Cannot determine type of "target"  [has-type]
+ python/pyspark/pandas/generic.py:788: error: Need type annotation for "new_name"  [var-annotated]
+ python/pyspark/pandas/frame.py:8453: error: Incompatible types in assignment (expression has type "str | list[Any]", variable has type "list[Any] | dict[Any, Any]")  [assignment]
+ python/pyspark/pandas/indexes/base.py:2088: error: Need type annotation for "item"  [var-annotated]
+ python/pyspark/pandas/data_type_ops/complex_ops.py:56: error: "DataType" has no attribute "elementType"  [attr-defined]
+ python/pyspark/sql/plot/plotly.py:173: error: Need type annotation for "i"  [var-annotated]
+ python/pyspark/sql/connect/dataframe.py:885: error: "tuple[dict[str, Column]]" has no attribute "items"  [attr-defined]
+ python/pyspark/sql/connect/client/core.py:1751: error: Unexpected keyword argument "message_paramters" for "PySparkValueError"; did you mean "messageParameters"?  [call-arg]
+ python/pyspark/errors/exceptions/base.py:35: note: "PySparkValueError" defined here
+ python/pyspark/sql/worker/write_into_data_source.py:206: error: Need type annotation for "res"  [var-annotated]
+ python/pyspark/sql/worker/write_into_data_source.py:208: error: Incompatible types in assignment (expression has type "WriterCommitMessage", variable has type "Never")  [assignment]
+ python/pyspark/streaming/context.py:171: error: Need type annotation for "activePythonContextJavaId"  [var-annotated]
+ python/pyspark/streaming/context.py:172: error: Need type annotation for "activeJvmContextOption"  [var-annotated]
+ python/pyspark/streaming/context.py:390: error: Argument 1 to "parallelize" of "SparkContext" has incompatible type "RDD[T]"; expected "Iterable[T]"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:272: error: Too many arguments for "MLReadable"  [call-arg]
+ python/pyspark/ml/connect/readwrite.py:275: error: "RL" has no attribute "_resetUid"  [attr-defined]
+ python/pyspark/ml/connect/readwrite.py:277: error: "RL" has no attribute "_set"  [attr-defined]
+ python/pyspark/ml/connect/readwrite.py:286: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:287: error: Incompatible return value type (got "Pipeline", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:293: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:294: error: Incompatible return value type (got "PipelineModel", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:300: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:301: error: Incompatible return value type (got "CrossValidator", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:306: error: Argument 1 to "CrossValidatorModelReader" has incompatible type "type[CrossValidator]"; expected "type[CrossValidatorModel]"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:307: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:308: error: Incompatible return value type (got "CrossValidatorModel", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:314: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:315: error: Incompatible return value type (got "TrainValidationSplit", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:320: error: Incompatible types in assignment (expression has type "TrainValidationSplitModelReader", variable has type "TrainValidationSplitReader")  [assignment]
+ python/pyspark/ml/connect/readwrite.py:321: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:322: error: Incompatible return value type (got "TrainValidationSplit", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:328: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:329: error: Incompatible return value type (got "OneVsRest[Any]", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:335: error: Argument 1 to "session" of "BaseReadWrite" has incompatible type "pyspark.sql.connect.session.SparkSession"; expected "pyspark.sql.session.SparkSession"  [arg-type]
+ python/pyspark/ml/connect/readwrite.py:336: error: Incompatible return value type (got "OneVsRestModel", expected "RL")  [return-value]
+ python/pyspark/ml/connect/readwrite.py:356: error: Incompatible types in assignment (expression has type "PowerIterationClustering", variable has type "RL")  [assignment]
+ python/pyspark/ml/connect/readwrite.py:357: error: "RL" has no attribute "_resetUid"  [attr-defined]
+ python/pyspark/ml/connect/readwrite.py:359: error: "RL" has no attribute "_set"  [attr-defined]
+ python/pyspark/ml/connect/readwrite.py:360: error: Unused "type: ignore" comment  [unused-ignore]
+ python/pyspark/mllib/linalg/__init__.py:1104: error: Incompatible return value type (got "SparseVector", expected "DenseVector")  [return-value]

pip (https://github.com/pypa/pip)
+ src/pip/_internal/resolution/legacy/resolver.py:454: error: Argument 2 to "prepare_installed_requirement" of "RequirementPreparer" has incompatible type "str | None"; expected "str"  [arg-type]
+ src/pip/_internal/resolution/legacy/resolver.py:476: error: Item "None" of "Link | None" has no attribute "scheme"  [union-attr]

websockets (https://github.com/aaugustin/websockets)
+ src/websockets/legacy/protocol.py:1077: error: Argument 1 to "join" of "str" has incompatible type "list[str | bytes]"; expected "Iterable[str]"  [arg-type]
+ src/websockets/legacy/protocol.py:1077: error: Argument 1 to "join" of "bytes" has incompatible type "list[str | bytes]"; expected "Iterable[Buffer]"  [arg-type]

operator (https://github.com/canonical/operator)
- ops/framework.py:619: error: Unused "type: ignore" comment  [unused-ignore]

sympy (https://github.com/sympy/sympy)
+ sympy/core/add.py:227: error: Need type annotation for "s"  [var-annotated]
+ sympy/integrals/manualintegrate.py:1949: error: Need type annotation for "arg"  [var-annotated]

pylint (https://github.com/pycqa/pylint)
+ pylint/checkers/base_checker.py:168: error: Need type annotation for "existing_ids" (hint: "existing_ids: list[<type>] = ...")  [var-annotated]

sphinx (https://github.com/sphinx-doc/sphinx)
+ sphinx/util/osutil.py: note: In function "_relative_path":
+ sphinx/util/osutil.py:186:12: error: Unexpected keyword argument "walk_up" for "relative_to" of "PurePath"  [call-arg]
+ note: "relative_to" of "PurePath" defined here
+ sphinx/util/nodes.py: note: In function "_deepcopy":
+ sphinx/util/nodes.py:748:30: error: Incompatible types in assignment (expression has type "str", variable has type "int")  [assignment]
+ sphinx/transforms/__init__.py: note: In member "apply_transforms" of class "SphinxTransformer":
+ sphinx/transforms/__init__.py:103:33: error: Incompatible types in assignment (expression has type "Node", variable has type "document")  [assignment]
+ sphinx/environment/collectors/toctree.py: note: In function "process_doc":
+ sphinx/environment/collectors/toctree.py:132:29: error: Need type annotation for "sig_node"  [var-annotated]
+ sphinx/environment/collectors/toctree.py:142:39: error: Need type annotation for "ids"  [var-annotated]
+ sphinx/environment/collectors/toctree.py:162:42: error: Need type annotation for "parent"  [var-annotated]

Tanjun (https://github.com/FasterSpeeding/Tanjun)
- tanjun/_internal/__init__.py:83: error: Statement is unreachable  [unreachable]
+ tanjun/_internal/__init__.py:83: error: Returning Any from function declared to return "bool"  [no-any-return]
+ tanjun/parsing.py:588: error: Need type annotation for "value"  [var-annotated]
- tanjun/parsing.py:588: error: "Never" has no attribute "__iter__" (not iterable)  [attr-defined]
- tanjun/parsing.py:1632: error: Statement is unreachable  [unreachable]
- tanjun/parsing.py:1642: error: Statement is unreachable  [unreachable]
- tanjun/dependencies/limiters.py:851: error: "Never" has no attribute "unlock"  [attr-defined]
+ tanjun/dependencies/limiters.py:852: error: Statement is unreachable  [unreachable]
- tanjun/checks.py:1026: error: Statement is unreachable  [unreachable]
- tanjun/checks.py:1140: error: Statement is unreachable  [unreachable]
- tanjun/commands/slash.py:820: error: Statement is unreachable  [unreachable]
- tanjun/commands/slash.py:1787: error: Statement is unreachable  [unreachable]
- tanjun/clients.py:2294: error: "Never" has no attribute "__iter__" (not iterable)  [attr-defined]
+ tanjun/clients.py:2295: error: Statement is unreachable  [unreachable]
+ tanjun/clients.py:2296: error: Statement is unreachable  [unreachable]
- tanjun/annotations.py:1448: error: Statement is unreachable  [unreachable]
- tanjun/annotations.py:1453: error: Statement is unreachable  [unreachable]
- tanjun/annotations.py:1458: error: Statement is unreachable  [unreachable]
- tanjun/annotations.py:1466: error: Statement is unreachable  [unreachable]
+ tanjun/annotations.py:1449: error: Value of type variable "_ChoiceT" of "Choices" cannot be "_EnumT"  [type-var]
+ tanjun/annotations.py:1453: error: Incompatible types in assignment (expression has type "type[int]", variable has type "type[float]")  [assignment]
+ tanjun/annotations.py:1454: error: Value of type variable "_ChoiceT" of "Choices" cannot be "_EnumT"  [type-var]
+ tanjun/annotations.py:1455: error: Incompatible types in assignment (expression has type "_IntEnumConverter", variable has type "_FloatEnumConverter")  [assignment]
+ tanjun/annotations.py:1458: error: Incompatible types in assignment (expression has type "type[str]", variable has type "type[float]")  [assignment]
+ tanjun/annotations.py:1459: error: Value of type variable "_ChoiceT" of "Choices" cannot be "_EnumT"  [type-var]

paasta (https://github.com/yelp/paasta)

freqtrade (https://github.com/freqtrade/freqtrade)
+ freqtrade/rpc/telegram.py:558: error: TypedDict "RPCStrategyMsg" has no key "status"  [typeddict-item]
+ freqtrade/rpc/telegram.py:558: error: TypedDict "RPCWhitelistMsg" has no key "status"  [typeddict-item]
+ freqtrade/rpc/telegram.py:558: error: TypedDict "RPCAnalyzedDFMsg" has no key "status"  [typeddict-item]
+ freqtrade/rpc/telegram.py:558: error: TypedDict "RPCNewCandleMsg" has no key "status"  [typeddict-item]

pandas-stubs (https://github.com/pandas-dev/pandas-stubs)
+ tests/test_frame.py:3671: error: All overload variants of "select_dtypes" of "DataFrame" require at least one argument  [call-overload]
+ tests/test_frame.py:3671: note: Possible overload variants:

... (truncated 486 lines) ...```