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-rw-r--r--library/core/src/intrinsics/mod.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/library/core/src/intrinsics/mod.rs b/library/core/src/intrinsics/mod.rs
index be2cfd3f3ed..ce8c8c8946e 100644
--- a/library/core/src/intrinsics/mod.rs
+++ b/library/core/src/intrinsics/mod.rs
@@ -1635,7 +1635,7 @@ pub fn ptr_mask<T>(_ptr: *const T, _mask: usize) -> *const T;
 ///
 /// The safety requirements are consistent with [`copy_nonoverlapping`]
 /// while the read and write behaviors are volatile,
-/// which means it will not be optimized out unless size is equal to zero.
+/// which means it will not be optimized out unless `_count` or `size_of::<T>()` is equal to zero.
 ///
 /// [`copy_nonoverlapping`]: ptr::copy_nonoverlapping
 #[rustc_intrinsic]