Make RcBlock be #[repr(transparent)]

To ensure the memory layout guarantee is correct. See #655
madsmtm · Sep 23, 2024 · e9e09a6 · e9e09a6
1 parent afc0723
commit e9e09a6
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/crates/block2/src/rc_block.rs b/crates/block2/src/rc_block.rs
@@ -29,6 +29,7 @@ use crate::{ffi, Block, IntoBlock, StackBlock};
 /// Additionally, it participates in the null-pointer optimization, that is,
 /// `Option<RcBlock<A, R>>` is guaranteed to have the same size as
 /// `RcBlock<A, R>`.
+#[repr(transparent)]
 #[doc(alias = "MallocBlock")]
 pub struct RcBlock<F: ?Sized> {
     // Covariant