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PYI055's "safe" fix breaks type annotation semantics #9156

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tooruu opened this issue Dec 16, 2023 · 2 comments · Fixed by #9161
Closed

PYI055's "safe" fix breaks type annotation semantics #9156

tooruu opened this issue Dec 16, 2023 · 2 comments · Fixed by #9161
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bug Something isn't working

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@tooruu
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tooruu commented Dec 16, 2023

Ruff 0.1.8
ruff check --isolated --select PYI055 --fix
turns

def convert_union(union: UnionType) -> _T | None:
    converters: tuple[
        type[_T] | type[Converter[_T]] | Converter[_T] | Callable[[str], _T], ...
    ] = union.__args__
    ...

into

def convert_union(union: UnionType) -> _T | None:
    converters: tuple[
        type[_T | Converter[_T]], ...
    ] = union.__args__
    ...

completely disregarding Converter[_T] | Callable[[str], _T]
@zanieb zanieb added the bug Something isn't working label Dec 16, 2023
@zanieb
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zanieb commented Dec 16, 2023 •
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Thanks for the report! This just looks like a bug cc @diceroll123

ref #7886 #7934

@diceroll123 diceroll123 mentioned this issue Dec 16, 2023
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@diceroll123
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Sorry about that silly oversight! Opened a PR to fix.

@Avasam Avasam mentioned this issue Dec 16, 2023
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charliermarsh pushed a commit that referenced this issue Dec 16, 2023
@diceroll123
Fix dropped union expressions for piped non-types in PYI055 autofix (…
85b27a9 
…#9161)

## Summary

Fix dropped union expressions for piped non-types in `PYI055` autofix

If you had `type[int] | type[str] | str`, it would have dropped the
`str`, which breaks the type!

Closes #9156 

## Test Plan

`cargo test`
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Fix dropped union expressions for piped non-types in PYI055 autofix diceroll123/ruff
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@diceroll123 @zanieb @tooruu