diff options
Diffstat (limited to 'src/liballoc/sync.rs')
| -rw-r--r-- | src/liballoc/sync.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/liballoc/sync.rs b/src/liballoc/sync.rs index 88027d48e8a..3343384754f 100644 --- a/src/liballoc/sync.rs +++ b/src/liballoc/sync.rs @@ -2161,6 +2161,8 @@ impl<T: ?Sized> Unpin for Arc<T> { } unsafe fn data_offset<T: ?Sized>(ptr: *const T) -> isize { // Align the unsized value to the end of the `ArcInner`. // Because it is `?Sized`, it will always be the last field in memory. + // Note: This is a detail of the current implementation of the compiler, + // and is not a guaranteed language detail. Do not rely on it outside of std. data_offset_align(align_of_val(&*ptr)) } |