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Announcement issue for plugin API changes
#6617 ·msullivanopenedon Apr 3, 2019
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Startup error: occasional "AssertionError: Cannot find component 'SSL' for 'OpenSSL.SSL.Context'"

crash

Status: Open.

#19477 In python/mypy;

·jvanasco opened

on Jul 17, 2025

More specific inline dict type inference can fail on 1.17.0

bugmypy got something wrong

topic-inferenceWhen to infer types or require explicit annotations

Status: Open.

#19474 In python/mypy;

·markhobson opened

on Jul 17, 2025

[match-case]/[isinstance] narrowing logic against the special <code>AnyCallable</code> Protocol differs from <code>callable()</code> check

bugmypy got something wrong

topic-match-statementPython 3.10's match statement

topic-type-narrowingConditional type narrowing / binder

Status: Open.

#19470 In python/mypy;

·randolf-scholz opened

on Jul 17, 2025

[match-case] mypy ignores missing <code>@runtime_checkable</code> in class-pattern

bugmypy got something wrong

topic-match-statementPython 3.10's match statement

topic-runtime-semanticsmypy doesn't model runtime semantics correctly

Status: Open.

#19469 In python/mypy;

·randolf-scholz opened

on Jul 17, 2025

[match-case] class pattern narrowing with Union-argument different from equivalent <code>isinstance</code> call.

bugmypy got something wrong

topic-match-statementPython 3.10's match statement

topic-type-narrowingConditional type narrowing / binder

Status: Open.

#19468 In python/mypy;

·randolf-scholz opened

on Jul 16, 2025

Dict unpacking fails when used for building TypedDict with required keys

bugmypy got something wrong

topic-typed-dict

Status: Open.

#19467 In python/mypy;

·adamantike opened

on Jul 16, 2025

Bug report (Regression): bad overload resolution in <code>--strict</code> mode

bugmypy got something wrong

Status: Open.

#19458 In python/mypy;

·thierry-martinez opened

on Jul 16, 2025

Extending <code>TraverserVisitor</code> causes <code>TypeError: interpreted classes cannot inherit from compiled traits</code>

bugmypy got something wrong

Status: Open.

#19456 In python/mypy;

·frebib opened

on Jul 16, 2025

Comparison operators emit "Unsupported operand types" when using <code>isinstance</code> to narrow <code>TypeVar</code> to union of numeric types

bugmypy got something wrong

Status: Open.

#19454 In python/mypy;

·bkeryan opened

on Jul 15, 2025

No-field class derived from <code>dataclass_transform</code> base class uses base class's constructor signature

bugmypy got something wrong

topic-dataclass-transformPEP 681

Status: Open.

#19452 In python/mypy;

·caoculus opened

on Jul 15, 2025

[PEP 696] Assigning to type variables with defaults gives unexpected results

bugmypy got something wrong

topic-pep-696TypeVar defaults

topic-type-variables

Status: Open.

#19444 In python/mypy;

·randolf-scholz opened

on Jul 15, 2025

Match statement parameter binding fails for subclass of generic class

bugmypy got something wrong

topic-match-statementPython 3.10's match statement

topic-runtime-semanticsmypy doesn't model runtime semantics correctly

topic-type-narrowingConditional type narrowing / binder

Status: Open.

#19442 In python/mypy;

·xeniarose opened

on Jul 15, 2025

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Startup error: occasional "AssertionError: Cannot find component 'SSL' for 'OpenSSL.SSL.Context'"

More specific inline dict type inference can fail on 1.17.0

[match-case]/[isinstance] narrowing logic against the special <code>AnyCallable</code> Protocol differs from <code>callable()</code> check

[match-case] mypy ignores missing <code>@runtime_checkable</code> in class-pattern

[match-case] class pattern narrowing with Union-argument different from equivalent <code>isinstance</code> call.

Dict unpacking fails when used for building TypedDict with required keys

Bug report (Regression): bad overload resolution in <code>--strict</code> mode

Extending <code>TraverserVisitor</code> causes <code>TypeError: interpreted classes cannot inherit from compiled traits</code>

Comparison operators emit "Unsupported operand types" when using <code>isinstance</code> to narrow <code>TypeVar</code> to union of numeric types

No-field class derived from <code>dataclass_transform</code> base class uses base class's constructor signature

[PEP 696] Assigning to type variables with defaults gives unexpected results

Match statement parameter binding fails for subclass of generic class