// test for https://github.com/rust-lang/rust/issues/86940 //@ run-rustfix //@ edition:2018 //@ check-pass #![warn(rust_2021_prelude_collisions)] #![allow(dead_code)] #![allow(unused_imports)] struct Generic<'a, U>(&'a U); trait MyFromIter { fn from_iter(_: i32) -> Self; } impl MyFromIter for Generic<'static, i32> { fn from_iter(_: i32) -> Self { todo!() } } impl std::iter::FromIterator for Generic<'static, i32> { fn from_iter>(_: T) -> Self { todo!() } } fn main() { as MyFromIter>::from_iter(1); //~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021 //~| this is accepted in the current edition (Rust 2018) as MyFromIter>::from_iter(1); //~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021 //~| this is accepted in the current edition (Rust 2018) as MyFromIter>::from_iter(1); //~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021 //~| this is accepted in the current edition (Rust 2018) }