diff options
Diffstat (limited to 'library')
| -rw-r--r-- | library/core/src/ptr/non_null.rs | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/library/core/src/ptr/non_null.rs b/library/core/src/ptr/non_null.rs index 032df7f5a80..87c8674af0d 100644 --- a/library/core/src/ptr/non_null.rs +++ b/library/core/src/ptr/non_null.rs @@ -173,8 +173,14 @@ impl<T: ?Sized> NonNull<T> { /// /// let mut x = 0u32; /// let ptr = unsafe { NonNull::new_unchecked(&mut x as *mut _) }; + /// ``` + /// + /// *Incorrect* usage of this function: + /// + /// ```rust,no_run + /// use std::ptr::NonNull; /// - /// // NEVER DO THAT!!! + /// // NEVER DO THAT!!! This is undefined behavior. ⚠️ /// let ptr = unsafe { NonNull::<u32>::new_unchecked(std::ptr::null_mut()) }; /// ``` #[stable(feature = "nonnull", since = "1.25.0")] |