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Note the invariance over 'env in Scope<'env>.

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This commit is contained in:
Mara Bos
2022-01-05 12:13:33 +01:00
parent 5bd5781823
commit aa9c0881ef
1 changed files with 2 additions and 0 deletions
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2
library/std/src/thread/scoped.rs
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@@ -11,6 +11,8 @@ use crate::sync::Arc;
/// See [`scope`] for details. /// See [`scope`] for details.
pub struct Scope<'env> { pub struct Scope<'env> {
data: ScopeData, data: ScopeData,
/// Invariance over 'env, to make sure 'env cannot shrink,
/// which is necessary for soundness.
env: PhantomData<&'env mut &'env ()>, env: PhantomData<&'env mut &'env ()>,
} }