6 Pull requests merged by 4 people

• More detailed checking of type objects in stubtest

  #18251 merged Aug 23, 2025

• Remove unnecessary error message for match class patterns

  #19708 merged Aug 23, 2025

• stubtest: handle overloads with mixed pos-only params

  #18287 merged Aug 23, 2025

• Somewhat better support for isinstance on old-style unions

  #19714 merged Aug 23, 2025

• Use union for captured vars in or pattern

  #19710 merged Aug 22, 2025

• stubtest: flag redundant @disjoint_base decorators

  #19715 merged Aug 22, 2025

5 Pull requests opened by 4 people

• [mypyc] feat: remove redundant box/unbox operations

  #19717 opened Aug 23, 2025

• `--strict-equality` for `None`

  #19718 opened Aug 23, 2025

• Support error codes from plugins in options

  #19719 opened Aug 23, 2025

• Update dependencies

  #19720 opened Aug 24, 2025

• Revert "Enable colored output for argparse help in Python 3.14 (#19021)"

  #19721 opened Aug 24, 2025

3 Issues closed by 3 people

• stubtest treats constructors of native types as `(self, *args, **kwargs)`.

  #17672 closed Aug 24, 2025

• stubtest mishandles overloads where param is pos-only in one overload

  #17023 closed Aug 23, 2025

• Support typing.Union/typing.Optional in isinstance check (/support old-style unions)

  #17680 closed Aug 23, 2025

3 Issues opened by 3 people

• Incorrect error for unions syntax in comments and strings (Python 3.9)

  #19722 opened Aug 24, 2025

• Spurious type error with async function + generic callable argument + optional return type

  #19716 opened Aug 23, 2025

• mypy incorrectly infers callable signature when assigning async function to class attribute

  #19713 opened Aug 22, 2025

20 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• fix crash with variadic tuple arguments to generic type

  #19705 commented on Aug 24, 2025 • 1 new comment

• Fix spurious possibly-undefined errors in for-else with break

  #19696 commented on Aug 23, 2025 • 0 new comments

• Handle more cases in `any_constraints`

  #19695 commented on Aug 22, 2025 • 0 new comments

• [mypyc] feat: new primitive for `int.to_bytes`

  #19674 commented on Aug 23, 2025 • 0 new comments

• [mypyc] feat: new primitive for `int.bit_length`

  #19673 commented on Aug 23, 2025 • 0 new comments

• [mypyc] feat: new primitives for `bytes.rjust` and `bytes.ljust`

  #19672 commented on Aug 23, 2025 • 0 new comments

• [mypyc] feat: `__mypyc_empty_tuple__` constant

  #19654 commented on Aug 25, 2025 • 0 new comments

• Fix `--strict-equality` for iteratively visited code

  #19635 commented on Aug 23, 2025 • 0 new comments

• [mypyc] feat: PyObject_CallObject op for fn(*args) fastpath

  #19631 commented on Aug 24, 2025 • 0 new comments

• [stubtest] Improve checking of positional-only parameters in dunder methods

  #19593 commented on Aug 23, 2025 • 0 new comments

• [stubtest] Check runtime availability of private types not marked `@type_check_only`

  #19574 commented on Aug 23, 2025 • 0 new comments

• [mypyc] feat: cache len for container creation from expressions with length known at compile time

  #19503 commented on Aug 23, 2025 • 0 new comments

• WIP: new mypyc primitive for `weakref.ref.__call__`

  #19145 commented on Aug 23, 2025 • 0 new comments

• Defer type analysis of integer Literal when builtins.int is slow to resolve

  #18046 commented on Aug 23, 2025 • 0 new comments

• `mypy` 1.7.1 build error on `ppc`: `FATAL: Section too large, can't encode r_address (0x109e874) into 24-bits of scattered relocation entry`

  #16684 commented on Aug 24, 2025 • 0 new comments

• mypy crashes when passing multiple variadic tuples

  #19704 commented on Aug 24, 2025 • 0 new comments

• Flag `None` check on value that cannot be `None`

  #18386 commented on Aug 23, 2025 • 0 new comments

• Type alias over generic parameter in generic class produces an error

  #17956 commented on Aug 22, 2025 • 0 new comments

• MyPy infers descriptors are always ClassVars when testing assignability to protocols

  #19702 commented on Aug 22, 2025 • 0 new comments

• Regression: dict | None or dict fallback breaks type inference for nested dicts after PR #19249

  #19492 commented on Aug 22, 2025 • 0 new comments