Code
// Cargo.toml: a rust-version <= 1.79 (while being on 1.80 or nightly)
#![warn(unused_qualifications)]
let align = core::mem::align_of::<u128>();
dbg!(align);
Current output
warning: unnecessary qualification
--> src/main.rs:9:17
|
9 | let align = core::mem::align_of::<u128>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
note: the lint level is defined here
--> src/main.rs:2:9
|
2 | #![warn(unused_qualifications, unused_imports)]
| ^^^^^^^^^^^^^^^^^^^^^
help: remove the unnecessary path segments
|
9 - let align = core::mem::align_of::<u128>();
9 + let align = align_of::<u128>();
|
Desired output
The lint should not be triggered as core::mem::align_of is only part of the prelude since 1.80 (see #123168)
Rationale and extra context
Adding use core::mem::align_of (or std::…) and using it that way will not trigger unused_imports (warn-by-default) on 1.80 which is somewhat weird. Applying the fixes for unused_qualifications changes the MSRV while unused_imports doesn't?
I somewhat expect this to be closed as won't fix as rustc itself doesn't care about cargo related settings?
Other cases
No response
Rust Version
rustc 1.80.1 (3f5fd8dd4 2024-08-06)
binary: rustc
commit-hash: 3f5fd8dd41153bc5fdca9427e9e05be2c767ba23
commit-date: 2024-08-06
host: x86_64-unknown-linux-gnu
release: 1.80.1
LLVM version: 18.1.7
Anything else?
No response
Code
Current output
Desired output
The lint should not be triggered as
core::mem::align_ofis only part of the prelude since 1.80 (see #123168)Rationale and extra context
Adding
use core::mem::align_of(orstd::…) and using it that way will not triggerunused_imports(warn-by-default) on 1.80 which is somewhat weird. Applying the fixes forunused_qualificationschanges the MSRV whileunused_importsdoesn't?I somewhat expect this to be closed as won't fix as
rustcitself doesn't care about cargo related settings?Other cases
No response
Rust Version
Anything else?
No response