`unused_qualifications` warns about global paths

[rnbguy]

I tried this code:

pub fn bar() -> u64 {
    ::core::default::Default::default()
}

fn main() {}

I expected to see it pass with unused_qualifications lints. As it does on stable.

$ cargo clippy -- -W unused_qualifications
    Checking foo v0.1.0 (/home/user/foo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.06s

Instead, nightly suggests to replace the global path.

$ cargo +nightly clippy -- -W unused_qualifications
    Checking foo v0.1.0 (/home/user/foo)
warning: unnecessary qualification
 --> src/main.rs:2:5
  |
2 |     ::core::default::Default::default()
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: requested on the command line with `-W unused-qualifications`
help: remove the unnecessary path segments
  |
2 -     ::core::default::Default::default()
2 +     Default::default()
  |

Meta

$ rustc +nightly --version --verbose
rustc 1.78.0-nightly (4a0cc881d 2024-03-11)
binary: rustc
commit-hash: 4a0cc881dcc4d800f10672747f61a94377ff6662
commit-date: 2024-03-11
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0