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[ty]: Consider a class with a dynamic element in its MRO assignable to any subtype of type (#18205)

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Felix Scherz 2025-05-19 21:30:30 +02:00 • committed by GitHub
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14
crates/ty_python_semantic/resources/mdtest/exception/basic.md
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@ -62,6 +62,20 @@ def foo(
reveal_type(i) # revealed: BaseException
```
We do not emit an `invalid-exception-caught` if a class is caught that has `Any` or `Unknown` in its
MRO, as the dynamic element in the MRO could materialize to some subclass of `BaseException`:
```py
from compat import BASE_EXCEPTION_CLASS # error: [unresolved-import] "Cannot resolve imported module `compat`"
class Error(BASE_EXCEPTION_CLASS): ...
try:
...
except Error as err:
...
```
## Invalid exception handlers
```py