Issues

• [mypy 2.4 regression] Incorrect type narrowing for reversed list of tuples

  bugtopic-overloads
  python/mypy#22174 · Filter by author haudren-woven opened on Oct 7, 2026
  8

• overloads not properly evaluated with mypy 2.3.0 and numpy 2.5.1

  bugtopic-overloads
  python/mypy#21733 · Filter by author Dr-Irv opened on Jul 15, 2026
  3

• list.sort() fails to detect type issue

  bugtopic-overloadstopic-self-types
  python/mypy#21646 · Filter by author alexprengere opened on Jun 25, 2026
  1

• [stubtest] False positive involving overloaded function with default argument for parameter with type variable

  bugtopic-overloadstopic-stubtesttopic-type-variables
  python/mypy#21597 · Filter by author brianschubert opened on Jun 7, 2026
  1

• Support @deprecated on overloaded property setters

  featuretopic-overloads
  python/mypy#21593 · Filter by author Viicos opened on Jun 5, 2026

• Overlapping overloads false positive with ParamSpec shenanigans

  bugtopic-overloadstopic-paramspec
  python/mypy#21171 · Filter by author jonathandung opened on Apr 5, 2026

• Relax default overload subtyping checks

  false-positivefeaturetopic-overloads
  python/mypy#20720 · Filter by author randolf-scholz opened on Feb 2, 2026

• False positive on manual overloaded Foo[T].__init__(self, arg) call

  bugtopic-overloads
  python/mypy#20557 · Filter by author randolf-scholz opened on Jan 10, 2026

• extremely slow type checking for constrained TypeVars and overloads on generic classes

  performancetopic-overloadstopic-type-variables
  python/mypy#20439 · Filter by author quczer opened on Dec 18, 2025
  8

• Treating all numpy floating and complex types as interchangeable in overloads

  bugfalse-positivetopic-overloads
  python/mypy#20141 · Filter by author mcdigman opened on Oct 29, 2025
  3

• False positive overload-overlap with booleans and integer literals

  bugtopic-overloads
  python/mypy#20084 · Filter by author bzoracler opened on Oct 18, 2025
  2

• No error for overlapping overloads that vary in parameters with default values

  bugtopic-overloads
  python/mypy#19803 · Filter by author brianschubert opened on Sep 6, 2025
  2

• Type-narrowing based on instance type

  bugtopic-overloadstopic-self-types
  python/mypy#19671 · Filter by author nenb opened on Aug 15, 2025

• overload, Protocol and generic self: annotations

  bugtopic-overloadstopic-protocolstopic-self-types
  python/mypy#19381 · Filter by author Alan-Chen99 opened on Jul 5, 2025

• "Invalid self argument" for numpy's iadd

  bugtopic-overloads
  python/mypy#19171 · Filter by author bersbersbers opened on May 30, 2025
  9

• overloads in if TYPE_CHECKING shouldn't require implementations

  featuretopic-overloads
  python/mypy#19169 · Filter by author A5rocks opened on May 29, 2025
  3

• Overloads with Generics "does not accept all possible arguments"

  bugtopic-overloads
  python/mypy#19053 · Filter by author cokelid opened on May 8, 2025
  1

• overload + decorator to transform callable into class protocol w/ attribute does not see the attribute

  bugtopic-overloads
  python/mypy#18715 · Filter by author jakkdl opened on Feb 21, 2025

• Inconsistent Any matching with Overloads in TypeGuard/TypeIs

  bugtopic-overloads
  python/mypy#18659 · Filter by author davidhalter opened on Feb 11, 2025

• erroneous complaint that overloaded function implementation does not accept all possible arguments of signature

  bugfalse-positivetopic-overloads
  python/mypy#18596 · Filter by author cjw296 opened on Feb 4, 2025
  5

• TypeVar bound not respected in Generic class method overloads

  bugtopic-overloads
  python/mypy#18419 · Filter by author jackmpcollins opened on Jan 5, 2025
  1

• Add NoMatch for invalid signatures in overloads

  needs discussiontopic-overloads
  Unread
  python/mypy#18344·cdce8p opened Dec 27, 2024 · Updated Dec 27, 2024·Draft
  1

• mypy failed to return correct overloaded func type when decorate func accepts more than one parameter

  bugtopic-overloadstopic-paramspec
  python/mypy#18167 · Filter by author uriyyo opened on Nov 19, 2024
  2

• Overloads in generic classes are extremely slow when using generic self

  bugperformancetopic-overloadstopic-self-typestopic-type-variables
  python/mypy#18022 · Filter by author alexdrydew opened on Oct 23, 2024
  5

• overload with wrong return type is ignored

  featuretopic-overloads
  python/mypy#17857 · Filter by author ggirol-rc opened on Oct 1, 2024
  4