Commit graph

2 commits

Author SHA1 Message Date
David Peter
af988bf866
[red-knot] Detect division-by-zero in unions and intersections (#17157)
## Summary

With this PR, we emit a diagnostic for this case where
previously didn't:
```py
from typing import Literal

def f(m: int, n: Literal[-1, 0, 1]):
    # error: [division-by-zero] "Cannot divide object of type `int` by zero"
    return m / n
```

## Test Plan

New Markdown test
2025-04-02 18:21:27 +02:00
David Peter
860b95a318
[red-knot] Binary operator inference for union types (#16601)
## Summary

Properly handle binary operator inference for union types.

This fixes a bug I noticed while looking at ecosystem results. The MRE
version of it is this:

```py
def sub(x: float, y: float):
    # Red Knot: Operator `-` is unsupported between objects of type `int | float` and `int | float`
    return x - y
```

## Test Plan

- New Markdown tests.
- Expected diff in the ecosystem checks
2025-03-12 08:21:54 +01:00