Accessing undeclared field does not raise a type error
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
Research direction
Start with the lookup_self_field_neg.py reproducer and trace the Static Python type-checking path for c.x when C declares no fields. Confirm the current behavior, then make the checker report that C has no attribute x and verify the reproducer produces a compile-time error.
Written by the indexing model from the issue text.
Description
6862bbd
2021-10-13
What program did you run?
# lookup_self_field_neg.py
# This should fail.
class C:
pass
def f(c: C):
# reveal_type(c.x) # dynamic
return c.x
What happened?
The program passes type checks.
What should have happened?
We expected a compile-time error complaining that "C has no attribute x". (This is what mypy does.)
Is this another case where Static Python falls back to dynamic (similar to #50)?
- Dominant language
- Python
- Stars
- 3.8k
- Forks
- 139
- PR merge metrics
- No merged PRs in 30d
Contributor guide
First steps
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- Open a pull request that references the issue number.
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