diff options
| -rw-r--r-- | library/std/src/sync/once.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/library/std/src/sync/once.rs b/library/std/src/sync/once.rs index 1710c005393..47921283b21 100644 --- a/library/std/src/sync/once.rs +++ b/library/std/src/sync/once.rs @@ -90,6 +90,7 @@ mod tests; use crate::cell::Cell; use crate::fmt; use crate::marker; +use crate::panic::UnwindSafe; use crate::sync::atomic::{AtomicBool, AtomicUsize, Ordering}; use crate::thread::{self, Thread}; @@ -123,6 +124,9 @@ unsafe impl Sync for Once {} #[stable(feature = "rust1", since = "1.0.0")] unsafe impl Send for Once {} +#[stable(feature = "sync_once_ref_unwind_safe", since = "1.59.0")] +impl UnwindSafe for Once {} + /// State yielded to [`Once::call_once_force()`]’s closure parameter. The state /// can be used to query the poison status of the [`Once`]. #[stable(feature = "once_poison", since = "1.51.0")] |