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