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Diffstat (limited to 'library/core/src/cell/once.rs')
| -rw-r--r-- | library/core/src/cell/once.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/library/core/src/cell/once.rs b/library/core/src/cell/once.rs index 7757068a4..f74e563f1 100644 --- a/library/core/src/cell/once.rs +++ b/library/core/src/cell/once.rs @@ -298,3 +298,7 @@ impl<T> const From<T> for OnceCell<T> { OnceCell { inner: UnsafeCell::new(Some(value)) } } } + +// Just like for `Cell<T>` this isn't needed, but results in nicer error messages. +#[unstable(feature = "once_cell", issue = "74465")] +impl<T> !Sync for OnceCell<T> {} |