mirror of https://github.com/rust-lang/rust.git
46 lines
814 B
Rust
46 lines
814 B
Rust
//! Regression test for https://github.com/rust-lang/rust/issues/137646.
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//! The parameter value at all calls to `check` should be `(1, 1, 1)`.
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//@ run-pass
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use std::hint::black_box;
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type T = (i32, i32, i32);
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pub trait Trait {
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fn m(&self, _: T, _: T) {}
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}
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impl Trait for () {
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fn m(&self, mut _v1: T, v2: T) {
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_v1 = (0, 0, 0);
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check(v2);
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}
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}
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pub fn run_1(trait_: &dyn Trait) {
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let v1 = (1, 1, 1);
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let v2 = (1, 1, 1);
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trait_.m(v1, v2);
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}
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pub fn run_2(trait_: &dyn Trait) {
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let v1 = (1, 1, 1);
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let v2 = (1, 1, 1);
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trait_.m(v1, v2);
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check(v1);
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check(v2);
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}
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#[inline(never)]
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fn check(v: T) {
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assert_eq!(v, (1, 1, 1));
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}
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fn main() {
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black_box(run_1 as fn(&dyn Trait));
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black_box(run_2 as fn(&dyn Trait));
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run_1(&());
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run_2(&());
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}
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