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// run-pass
// Regression test for incorrect DropAndReplace behavior introduced in #60840
// and fixed in #61373. When combined with the optimization implemented in
// #60187, this produced incorrect code for generators when a saved local was
// re-assigned.
#![feature(generators, generator_trait)]
use std::ops::{Generator, GeneratorState};
use std::pin::Pin;
#[derive(Debug, PartialEq)]
struct Foo(i32);
impl Drop for Foo {
fn drop(&mut self) { }
}
fn main() {
let mut a = || {
let mut x = Foo(4);
yield;
assert_eq!(x.0, 4);
// At one point this tricked our dataflow analysis into thinking `x` was
// StorageDead after the assignment.
x = Foo(5);
assert_eq!(x.0, 5);
{
let y = Foo(6);
yield;
assert_eq!(y.0, 6);
}
assert_eq!(x.0, 5);
};
loop {
match Pin::new(&mut a).resume(()) {
GeneratorState::Complete(()) => break,
_ => (),
}
}
}
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