1warning: trait-associated function `from_iter` will become ambiguous in Rust 2021
2  --> $DIR/generic-type-collision.rs:15:5
3   |
4LL |     <Vec<i32>>::from_iter(None);
5   |     ^^^^^^^^^^^^^^^^^^^^^ help: disambiguate the associated function: `<Vec<i32> as MyTrait<_>>::from_iter`
6   |
7note: the lint level is defined here
8  --> $DIR/generic-type-collision.rs:4:9
9   |
10LL | #![warn(rust_2021_prelude_collisions)]
11   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
13   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/prelude.html>
14
15warning: 1 warning emitted
16
17