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