Closed
Description
With the code below, it seems the Iterator trait is wrongly picked over rayon's Paralllelterator, but only in some circumstances. This leads to a wrong error highlight.
- Happens with master (d3d547abfc) and 2021-10-11-stable
- All variants compile (tested 2018/2021/nightly/stable)
Dependency: rayon = "1.5"
use rayon::prelude::{IntoParallelIterator, ParallelIterator};
pub fn test() {
let _result = (0..64)
.into_par_iter()
.map(|_| (1, 1, 1)) // changing (1, 1, 1) to (1, 1) or "s" resolves the problem
// rust-analyzer says this calls fold() of ParalllelIterator (correct)
.fold(Vec::new, |mut vec, _| {
vec.push((1, 1)); // - pushing 1 or String::from("a") resolves the problem
// - pushing Box::new(1u8) does not resolve it
vec
})
// wrong error here: expected 1 argument, found 2
// rust-analyzer thinks this calls reduce() on Iterator (incorrect)
.reduce(Vec::new, |vec1, _vec2| vec1);
// a type annotation (here or above) resolves the problem
// let _foo: Vec<_> = _result;
}