derive_ord_xor_partial_ord lint expectation unfulfilled but also triggered

[spearman]

Description

I just updated to the latest nightly (rustc 1.94.0-nightly (2ca7bcd03 2025-12-23) and started seeing this issue.

The expectation is unfulfilled but clippy is also warning on the same item for the same lint (derive_ord_xor_partial_ord). I haven't seen it with any other lints.

Code is here https://gitlab.com/spearman/math-utils-rs/-/blob/2295a63a8250a9a4c8663eb22eb5a46b5744c3d1/src/types/mod.rs#L1142-1143

error: you are implementing `Ord` explicitly but have derived `PartialOrd`
    --> src/types/mod.rs:1143:1
     |
1143 | / impl <S : OrderedField> Ord for Normalized <S> {
1144 | |   fn cmp (&self, other : &Self) -> std::cmp::Ordering {
1145 | |     // safe to unwrap: normalized values are never NaN
1146 | |     self.partial_cmp (other).unwrap()
1147 | |   }
1148 | | }
     | |_^
     |
note: `PartialOrd` implemented here
    --> src/types/mod.rs:174:50
     |
 174 | #[derive(Clone, Copy, Debug, Default, PartialEq, PartialOrd)]
     |                                                  ^^^^^^^^^^
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#derive_ord_xor_partial_ord
     = note: `#[deny(clippy::derive_ord_xor_partial_ord)]` on by default

error: this lint expectation is unfulfilled
    --> src/types/mod.rs:1142:10
     |
1142 | #[expect(clippy::derive_ord_xor_partial_ord)]
     |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: `-D unfulfilled-lint-expectations` implied by `-D warnings`
     = help: to override `-D warnings` add `#[allow(unfulfilled_lint_expectations)]`

Version

rustc 1.94.0-nightly (2ca7bcd03 2025-12-23)
binary: rustc
commit-hash: 2ca7bcd03b87b52f7055a59b817443b0ac4a530d
commit-date: 2025-12-23
host: x86_64-unknown-linux-gnu
release: 1.94.0-nightly
LLVM version: 21.1.8

Additional Labels

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