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mypy doesn't catch inheritance of outer class #18393

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injust opened this issue Dec 31, 2024 · 0 comments
Open

mypy doesn't catch inheritance of outer class #18393

injust opened this issue Dec 31, 2024 · 0 comments
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bug mypy got something wrong topic-runtime-semantics mypy doesn't model runtime semantics correctly

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@injust
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injust commented Dec 31, 2024

Bug Report

Inheriting from an outer class raises NameError at runtime, but mypy doesn't catch this.

To Reproduce

class Foo:
    class Bar(Foo):
        pass

Expected Behavior

Actual Behavior

Success: no issues found in 1 source file

Your Environment

  • Mypy version used: 1.14.0
  • Python version used: 3.13
@injust injust added the bug mypy got something wrong label Dec 31, 2024
@hauntsaninja hauntsaninja added the topic-runtime-semantics mypy doesn't model runtime semantics correctly label Dec 31, 2024
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@injust @hauntsaninja