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Rename Red Knot (#17820)

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Micha Reiser 2025-05-03 19:49:15 +02:00 • committed by GitHub
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crates/ty_python_semantic/resources/mdtest/assignment/unbound.md Normal file
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# Unbound
## Unbound
```py
x = foo # error: [unresolved-reference] "Name `foo` used when not defined"
foo = 1
# No error `unresolved-reference` diagnostic is reported for `x`. This is
# desirable because we would get a lot of cascading errors even though there
# is only one root cause (the unbound variable `foo`).
# revealed: Unknown
reveal_type(x)
```
Note: in this particular example, one could argue that the most likely error would be a wrong order
of the `x`/`foo` definitions, and so it could be desirable to infer `Literal[1]` for the type of
`x`. On the other hand, there might be a variable `fob` a little higher up in this file, and the
actual error might have been just a typo. Inferring `Unknown` thus seems like the safest option.