literal_string_with_formatting_args triggered by cfg_attr feature

[messense]

Summary

Beta clippy starts to trigger this in pyo3/pyo3

Lint Name

literal_string_with_formatting_args

Reproducer

I tried this code:

#![warn(missing_docs)]
#![cfg_attr(
    feature = "nightly",
    feature(auto_traits, negative_impls, try_trait_v2)
)]

I saw this happen:

error: this looks like a formatting argument but it is not part of a formatting macro
   --> src/lib.rs:3:22
    |
  3 |       feature = "nightly",
    |  ______________________^
  4 | |     feature(auto_traits, negative_impls, try_trait_v2)
    | |_^
    |

I expected to see this happen: no warning/error

Version

rustc 1.85.0-beta.4 (752fecf80 2025-01-17)
binary: rustc
commit-hash: 752fecf8005cd7a7ae8c0b74d0f8fc3cd3cd86fe
commit-date: 2025-01-17
host: x86_64-unknown-linux-gnu
release: 1.85.0-beta.4
LLVM version: 19.1.7

Additional Labels

No response

[y21]

Probably a duplicate of #13885. That is, the issue is likely not related to cfg_attr, but that it emits a warning on a dummy span, as you can tell by the fact the warning points somewhere in the middle of a string.

[messense]

@y21 Thanks for the reply, marked as duplicate.