qinheping
diff --git a/‎Cargo.lock
+50-40 b/‎Cargo.lock
+50-40
diff --git a/‎alloc/Cargo.toml
+1-1 b/‎alloc/Cargo.toml
+1-1
diff --git a/‎alloc/benches/binary_heap.rs
+1-1 b/‎alloc/benches/binary_heap.rs
+1-1
diff --git a/‎alloc/benches/btree/map.rs
+2-2 b/‎alloc/benches/btree/map.rs
+2-2
diff --git a/‎alloc/benches/lib.rs
+2-1 b/‎alloc/benches/lib.rs
+2-1
diff --git a/‎alloc/benches/slice.rs
+4-4 b/‎alloc/benches/slice.rs
+4-4
diff --git a/‎alloc/benches/str.rs
+3-1 b/‎alloc/benches/str.rs
+3-1
diff --git a/‎alloc/benches/string.rs
+1-1 b/‎alloc/benches/string.rs
+1-1
diff --git a/‎alloc/benches/vec.rs
+1-1 b/‎alloc/benches/vec.rs
+1-1
diff --git a/‎alloc/benches/vec_deque.rs
+2-2 b/‎alloc/benches/vec_deque.rs
+2-2
@@ -10,7 +10,7 @@ edition = "2021"
 
 [dependencies]
 core = { path = "../core" }
-compiler_builtins = { version = "0.1.123", features = ['rustc-dep-of-std'] }
+compiler_builtins = { version = "0.1.136", features = ['rustc-dep-of-std'] }
 
 [dev-dependencies]
 rand = { version = "0.8.5", default-features = false, features = ["alloc"] }
 
@@ -1,7 +1,7 @@
 use std::collections::BinaryHeap;
 
 use rand::seq::SliceRandom;
-use test::{black_box, Bencher};
+use test::{Bencher, black_box};
 
 #[bench]
 fn bench_find_smallest_1000(b: &mut Bencher) {
 
@@ -1,9 +1,9 @@
 use std::collections::BTreeMap;
 use std::ops::RangeBounds;
 
-use rand::seq::SliceRandom;
 use rand::Rng;
-use test::{black_box, Bencher};
+use rand::seq::SliceRandom;
+use test::{Bencher, black_box};
 
 macro_rules! map_insert_rand_bench {
     ($name: ident, $n: expr, $map: ident) => {
 
@@ -4,7 +4,8 @@
 #![feature(iter_next_chunk)]
 #![feature(repr_simd)]
 #![feature(slice_partition_dedup)]
-#![feature(strict_provenance)]
+#![cfg_attr(bootstrap, feature(strict_provenance))]
+#![cfg_attr(not(bootstrap), feature(strict_provenance_lints))]
 #![feature(test)]
 #![deny(fuzzy_provenance_casts)]
 
 
@@ -1,8 +1,8 @@
 use std::{mem, ptr};
 
-use rand::distributions::{Alphanumeric, DistString, Standard};
 use rand::Rng;
-use test::{black_box, Bencher};
+use rand::distributions::{Alphanumeric, DistString, Standard};
+use test::{Bencher, black_box};
 
 #[bench]
 fn iterator(b: &mut Bencher) {
@@ -336,10 +336,10 @@ reverse!(reverse_u32, u32, |x| x as u32);
 reverse!(reverse_u64, u64, |x| x as u64);
 reverse!(reverse_u128, u128, |x| x as u128);
 #[repr(simd)]
-struct F64x4(f64, f64, f64, f64);
+struct F64x4([f64; 4]);
 reverse!(reverse_simd_f64x4, F64x4, |x| {
     let x = x as f64;
-    F64x4(x, x, x, x)
+    F64x4([x, x, x, x])
 });
 
 macro_rules! rotate {
 
@@ -1,4 +1,4 @@
-use test::{black_box, Bencher};
+use test::{Bencher, black_box};
 
 #[bench]
 fn char_iterator(b: &mut Bencher) {
@@ -347,3 +347,5 @@ make_test!(rsplitn_space_char, s, s.rsplitn(10, ' ').count());
 
 make_test!(split_space_str, s, s.split(" ").count());
 make_test!(split_ad_str, s, s.split("ad").count());
+
+make_test!(to_lowercase, s, s.to_lowercase());
@@ -1,6 +1,6 @@
 use std::iter::repeat;
 
-use test::{black_box, Bencher};
+use test::{Bencher, black_box};
 
 #[bench]
 fn bench_with_capacity(b: &mut Bencher) {
 
@@ -1,7 +1,7 @@
 use std::iter::repeat;
 
 use rand::RngCore;
-use test::{black_box, Bencher};
+use test::{Bencher, black_box};
 
 #[bench]
 fn bench_new(b: &mut Bencher) {
 
@@ -1,7 +1,7 @@
-use std::collections::{vec_deque, VecDeque};
+use std::collections::{VecDeque, vec_deque};
 use std::mem;
 
-use test::{black_box, Bencher};
+use test::{Bencher, black_box};
 
 #[bench]
 fn bench_new(b: &mut Bencher) {