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Rollup merge of #87653 - RalfJung:dont-run-ub, r=kennytm

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mark a UB doctest as no_run

See https://github.com/rust-lang/rust/pull/87547#discussion_r680334117
Cc `@GuillaumeGomez` `@kennytm`
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Yuki Okushi 2021-08-02 11:03:31 +09:00 • committed by GitHub
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8
library/core/src/ptr/non_null.rs
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@ -173,8 +173,14 @@ impl<T: ?Sized> NonNull<T> {
/// ///
/// let mut x = 0u32; /// let mut x = 0u32;
/// let ptr = unsafe { NonNull::new_unchecked(&mut x as *mut _) }; /// let ptr = unsafe { NonNull::new_unchecked(&mut x as *mut _) };
/// ```
/// ///
/// // NEVER DO THAT!!! /// *Incorrect* usage of this function:
///
/// ```rust,no_run
/// use std::ptr::NonNull;
///
/// // NEVER DO THAT!!! This is undefined behavior. ⚠️
/// let ptr = unsafe { NonNull::<u32>::new_unchecked(std::ptr::null_mut()) }; /// let ptr = unsafe { NonNull::<u32>::new_unchecked(std::ptr::null_mut()) };
/// ``` /// ```
#[stable(feature = "nonnull", since = "1.25.0")] #[stable(feature = "nonnull", since = "1.25.0")]