Auto merge of #138267 - matthiaskrgr:rollup-vt76bhs, r=matthiaskrgr

Rollup of 12 pull requests

Successful merges:

 - #136127 (Allow `*const W<dyn A> -> *const dyn A` ptr cast)
 - #136968 (Turn order dependent trait objects future incompat warning into a hard error)
 - #137319 (Stabilize `const_vec_string_slice`)
 - #137885 (tidy: add triagebot checks)
 - #138040 (compiler: Use `size_of` from the prelude instead of imported)
 - #138084 (Use workspace lints for crates in `compiler/`)
 - #138158 (Move more layouting logic to `rustc_abi`)
 - #138160 (depend more on attr_data_structures and move find_attr! there)
 - #138192 (crashes: couple more tests)
 - #138216 (bootstrap: Fix stack printing when a step cycle is detected)
 - #138232 (Reduce verbosity of GCC build log)
 - #138242 (Revert "Don't test new error messages with the stage 0 compiler")

r? `@ghost`
`@rustbot` modify labels: rollup

3 files changed, 4 insertions, 5 deletions

diff --git a/compiler/rustc_index/src/bit_set.rs b/compiler/rustc_index/src/bit_set.rs
index 6dc044a6d38..598409c9051 100644
--- a/compiler/rustc_index/src/bit_set.rs
+++ b/compiler/rustc_index/src/bit_set.rs
@@ -1,7 +1,9 @@
 use std::marker::PhantomData;
+#[cfg(not(feature = "nightly"))]
+use std::mem;
 use std::ops::{BitAnd, BitAndAssign, BitOrAssign, Bound, Not, Range, RangeBounds, Shl};
 use std::rc::Rc;
-use std::{fmt, iter, mem, slice};
+use std::{fmt, iter, slice};
 
 use Chunk::*;
 #[cfg(feature = "nightly")]
@@ -14,7 +16,7 @@ use crate::{Idx, IndexVec};
 mod tests;
 
 type Word = u64;
-const WORD_BYTES: usize = mem::size_of::<Word>();
+const WORD_BYTES: usize = size_of::<Word>();
 const WORD_BITS: usize = WORD_BYTES * 8;
 
 // The choice of chunk size has some trade-offs.
diff --git a/compiler/rustc_index/src/lib.rs b/compiler/rustc_index/src/lib.rs
index 3441a5f65c7..cc680838e7e 100644
--- a/compiler/rustc_index/src/lib.rs
+++ b/compiler/rustc_index/src/lib.rs
@@ -4,7 +4,6 @@
 #![cfg_attr(feature = "nightly", feature(extend_one, step_trait, test))]
 #![cfg_attr(feature = "nightly", feature(new_range_api))]
 #![cfg_attr(feature = "nightly", feature(new_zeroed_alloc))]
-#![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
 pub mod bit_set;
diff --git a/compiler/rustc_index/src/vec/tests.rs b/compiler/rustc_index/src/vec/tests.rs
index 381d79c24fc..5b0ca4b2b92 100644
--- a/compiler/rustc_index/src/vec/tests.rs
+++ b/compiler/rustc_index/src/vec/tests.rs
@@ -9,8 +9,6 @@ crate::newtype_index! {
 
 #[test]
 fn index_size_is_optimized() {
-    use std::mem::size_of;
-
     assert_eq!(size_of::<MyIdx>(), 4);
     // Uses 0xFFFF_FFFB
     assert_eq!(size_of::<Option<MyIdx>>(), 4);