Closed
Description
On nightly-2018-02-12 b8398d9, https://github.com/bholley/atomic_refcell builds with or without RUSTFLAGS=-Znll or RUSTFLAGS=-Zborrowck=mir.
On nightly-2018-02-13 16362c7, either flag causes the error below.
Commit range: b8398d9...16362c7
error[E0597]: `*orig.value` does not live long enough
--> src/lib.rs:309:22
|
309 | value: f(orig.value),
| ^^^^^^^^^^ borrowed value does not live long enough
...
312 | }
| - borrowed value only lives until here
|
= note: borrowed value must be valid for lifetime '_#3r...Reduced test case:
pub struct AtomicRefMut<'b, T: ?Sized + 'b> {
value: &'b mut T,
borrow: AtomicBorrowRefMut<'b>,
}
struct AtomicBorrowRefMut<'b> {
borrow: &'b (),
}
impl<'b> Drop for AtomicBorrowRefMut<'b> {
fn drop(&mut self) {}
}
impl<'b, T: ?Sized> AtomicRefMut<'b, T> {
pub fn map<U: ?Sized, F>(orig: AtomicRefMut<'b, T>, f: F) -> AtomicRefMut<'b, U>
where F: FnOnce(&mut T) -> &mut U
{
AtomicRefMut {
value: f(orig.value),
borrow: orig.borrow,
}
}
}