diff options
Diffstat (limited to 'tests/ui/nll/issue-55850.rs')
-rw-r--r-- | tests/ui/nll/issue-55850.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/nll/issue-55850.rs b/tests/ui/nll/issue-55850.rs new file mode 100644 index 000000000..e6279bd02 --- /dev/null +++ b/tests/ui/nll/issue-55850.rs @@ -0,0 +1,35 @@ +#![allow(unused_mut)] +#![feature(generators, generator_trait)] + +use std::marker::Unpin; +use std::ops::Generator; +use std::ops::GeneratorState::Yielded; +use std::pin::Pin; + +pub struct GenIter<G>(G); + +impl <G> Iterator for GenIter<G> +where + G: Generator + Unpin, +{ + type Item = G::Yield; + + fn next(&mut self) -> Option<Self::Item> { + match Pin::new(&mut self.0).resume(()) { + Yielded(y) => Some(y), + _ => None + } + } +} + +fn bug<'a>() -> impl Iterator<Item = &'a str> { + GenIter(move || { + let mut s = String::new(); + yield &s[..] //~ ERROR cannot yield value referencing local variable `s` [E0515] + //~| ERROR borrow may still be in use when generator yields + }) +} + +fn main() { + bug(); +} |