fix various aliasing issues in the standard library #78602
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Oct 31, 2020
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| /// Gets a mutable pointer to the first element of the array. | ||
| #[unstable(feature = "maybe_uninit_slice", issue = "63569")] | ||
| #[inline(always)] | ||
| pub fn slice_as_mut_ptr(this: &mut [MaybeUninit<T>]) -> *mut T { | ||
| this as *mut [MaybeUninit<T>] as *mut T | ||
| this.as_mut_ptr() as *mut T |
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This is not a bugfix but just a stylistic improvement.
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Rollup of 6 pull requests Successful merges: - rust-lang#78073 (Add #[inline] to some functions in core::str.) - rust-lang#78596 (Fix doc links to std::fmt) - rust-lang#78599 (Add note to process::arg[s] that args shouldn't be escaped or quoted) - rust-lang#78602 (fix various aliasing issues in the standard library) - rust-lang#78603 (expand: Tweak a comment in implementation of `macro_rules`) - rust-lang#78621 (Inline Default::default() for atomics) Failed merges: r? `@ghost`
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This fixes various cases where the standard library either used raw pointers after they were already invalidated by using the original reference again, or created raw pointers for one element of a slice and used it to access neighboring elements.