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Fix RawExpressionType.accept crash with --cache-fine-grained #17588

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Jul 26, 2024
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Fix RawExpressionType.accept crash with --cache-fine-grained #17588

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2 changes: 2 additions & 0 deletions mypy/types.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2705,6 +2705,8 @@ def simple_name(self) -> str:
return self.base_type_name.replace("builtins.", "")

def accept(self, visitor: TypeVisitor[T]) -> T:
if self.node is not None:
return self.node.accept(visitor)
assert isinstance(visitor, SyntheticTypeVisitor)
ret: T = visitor.visit_raw_expression_type(self)
return ret
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12 changes: 12 additions & 0 deletions test-data/unit/check-typeddict.test
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Expand Up @@ -1442,6 +1442,18 @@ reveal_type(x) # N: Revealed type is "TypedDict('__main__.X', {'a': TypedDict('_
reveal_type(x['a']['b']) # N: Revealed type is "builtins.int"
[builtins fixtures/dict.pyi]

[case testTypedDictForwardReferenceCacheFineGrained]
# flags: --cache-fine-grained
from mypy_extensions import TypedDict
class A(TypedDict):
b: "B"
class B(TypedDict):
c: "C"
class C(TypedDict):
d: "D"
class D:
pass

[case testSelfRecursiveTypedDictInheriting]
from mypy_extensions import TypedDict

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