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//! This test ensures that a mutable reference cannot be passed as a resume argument twice.
#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
use std::marker::Unpin;
use std::ops::{
Coroutine,
CoroutineState::{self, *},
};
use std::pin::Pin;
fn main() {
let mut thing = String::from("hello");
let mut gen = #[coroutine]
|r| {
if false {
yield r;
}
};
let mut gen = Pin::new(&mut gen);
gen.as_mut().resume(&mut thing);
gen.as_mut().resume(&mut thing);
//~^ cannot borrow `thing` as mutable more than once at a time
}
|
