* [Futures turning a shared reference into a mutable one](https://github.com/rust-lang/rust/pull/56319)
* [`str` turning a shared reference into a mutable one](https://github.com/rust-lang/rust/pull/58200)
* [`BTreeMap` creating mutable references that overlap with shared references](https://github.com/rust-lang/rust/pull/58431)
+* [`LinkedList` creating overlapping mutable references](https://github.com/rust-lang/rust/pull/60072)
## License
--- /dev/null
+#![feature(linked_list_extras)]
+use std::collections::LinkedList;
+
+fn list_from<T: Clone>(v: &[T]) -> LinkedList<T> {
+ v.iter().cloned().collect()
+}
+
+fn main() {
+ let mut m = list_from(&[0, 2, 4, 6, 8]);
+ let len = m.len();
+ {
+ let mut it = m.iter_mut();
+ it.insert_next(-2);
+ loop {
+ match it.next() {
+ None => break,
+ Some(elt) => {
+ it.insert_next(*elt + 1);
+ match it.peek_next() {
+ Some(x) => assert_eq!(*x, *elt + 2),
+ None => assert_eq!(8, *elt),
+ }
+ }
+ }
+ }
+ it.insert_next(0);
+ it.insert_next(1);
+ }
+
+ assert_eq!(m.len(), 3 + len * 2);
+ assert_eq!(m.into_iter().collect::<Vec<_>>(),
+ [-2, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1]);
+}