bors 335ffbfa54 Auto merge of #94472 - JmPotato:use_maybeuninit_for_vecdeque, r=m-ou-se ... Use MaybeUninit in VecDeque to remove the undefined behavior of slice Signed-off-by: JmPotato <ghzpotato@gmail.com> Ref https://github.com/rust-lang/rust/issues/74189. Adjust the code to follow the [doc.rust-lang.org/reference/behavior-considered-undefined.html](https://doc.rust-lang.org/reference/behavior-considered-undefined.html). * Change the return type of `buffer_as_slice` from `&[T]` to `&[MaybeUninit<T>]`. * Add some corresponding safety comments. Benchmark results: master 8d6f527530 ```rust test collections::vec_deque::tests::bench_pop_back_100 ... bench: 47 ns/iter (+/- 1) test collections::vec_deque::tests::bench_pop_front_100 ... bench: 50 ns/iter (+/- 4) test collections::vec_deque::tests::bench_push_back_100 ... bench: 69 ns/iter (+/- 10) test collections::vec_deque::tests::bench_push_front_100 ... bench: 72 ns/iter (+/- 6) test collections::vec_deque::tests::bench_retain_half_10000 ... bench: 145,891 ns/iter (+/- 7,975) test collections::vec_deque::tests::bench_retain_odd_10000 ... bench: 141,647 ns/iter (+/- 3,711) test collections::vec_deque::tests::bench_retain_whole_10000 ... bench: 120,132 ns/iter (+/- 4,078) ``` This PR ```rust test collections::vec_deque::tests::bench_pop_back_100 ... bench: 48 ns/iter (+/- 2) test collections::vec_deque::tests::bench_pop_front_100 ... bench: 51 ns/iter (+/- 3) test collections::vec_deque::tests::bench_push_back_100 ... bench: 73 ns/iter (+/- 2) test collections::vec_deque::tests::bench_push_front_100 ... bench: 73 ns/iter (+/- 2) test collections::vec_deque::tests::bench_retain_half_10000 ... bench: 131,796 ns/iter (+/- 5,440) test collections::vec_deque::tests::bench_retain_odd_10000 ... bench: 137,563 ns/iter (+/- 3,349) test collections::vec_deque::tests::bench_retain_whole_10000 ... bench: 128,815 ns/iter (+/- 3,289) ```		2022-03-11 19:23:55 +00:00
..
alloc	Rename AllocRef to Allocator and (de)alloc to (de)allocate	2020-12-04 14:47:15 +01:00
collections	Auto merge of #94472 - JmPotato:use_maybeuninit_for_vecdeque, r=m-ou-se	2022-03-11 19:23:55 +00:00
raw_vec	Add a unit test for zero-sized types in RawVec.	2021-11-26 19:30:45 +11:00
rc	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
sync	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
vec	Rollup merge of #94826 - allgoewer:fix-retain-documentation, r=yaahc	2022-03-11 03:32:06 +01:00
alloc.rs	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
borrow.rs	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
boxed.rs	Rollup merge of #93950 - T-O-R-U-S:use-modern-formatting-for-format!-macros, r=Mark-Simulacrum	2022-03-10 23:12:57 +01:00
fmt.rs	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
lib.rs	Stabilize const_fn_fn_ptr_basics and const_fn_trait_bound	2022-03-07 08:47:15 -08:00
macros.rs	Add diagnostic items for macros	2022-01-06 14:59:33 +00:00
raw_vec.rs	Fix typo	2022-02-12 12:31:33 +01:00
rc.rs	Add tracking issue and impl for Rc.	2022-02-03 10:40:31 +00:00
slice.rs	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
str.rs	Use spare_capacity_mut instead of invalid unchecked indexing	2021-12-08 17:58:57 -05:00
string.rs	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
sync.rs	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00
task.rs	Document From implementations for Waker and RawWaker	2021-04-22 14:16:33 -07:00
tests.rs	Use implicit capture syntax in format_args	2022-03-10 10:23:40 -05:00