unnecessary_debug_formatting does not respect MSRV

[lopopolo]

Summary

I have a crate with MSRV 1.76.0 which is triggering unnecessary_debug_formatting when using debug formatting on a Path and OsStr. This lint should not fire since the display methods were not stabilized until Rust 1.87.0.

Reproducer

I tried this code:

<code>

I expected to see this happen:

Instead, this happened:

Version

Additional Labels

No response

[lopopolo]

As an aside, this lint is firing within a Manual implementation of fmt::Debug on a struct, which feels like a false positive.

[profetia]

Reproducer:

#![warn(unnecessary_debug_formatting)]

use std::path::Path;

struct Foo(Path);

impl std::fmt::Debug for Foo {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{:?}", &self.0)
    }
}

[profetia]

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