Toolchain upgrade to nightly-2023-10-21 failed

[github-actions]

Updating Rust toolchain from nightly-2023-10-20 to nightly-2023-10-21 requires source changes.
The failed automated run can be found here.
Please review the changes at https://github.com/rust-lang/rust from rust-lang/rust@4578435 up to rust-lang/rust@249624b. The log for this commit range is:
rust-lang/rust@249624b504 Auto merge of #116958 - oli-obk:coro, r=pnkfelix
rust-lang/rust@258af95a60 Replace all uses of generator in markdown documentation with coroutine
rust-lang/rust@6fa47e15e7 bless miri
rust-lang/rust@69c09ddb36 bless ui-fulldeps
rust-lang/rust@6e8918ea1c Bless coverage map
rust-lang/rust@3beadb5ebd Fix stage0 core tests
rust-lang/rust@5c1872d7ae Rename generator folder
rust-lang/rust@af93c20c06 Rename lots of files that had generator in their name
rust-lang/rust@8c66e117e2 Re-add generators as a removed feature and point to the new feature name
rust-lang/rust@82ffd58bfb Rename Gen to Coro in tests
rust-lang/rust@2d91c76d5d Rename CoroutineKind::Gen to ::Coroutine
rust-lang/rust@e96ce20b34 s/generator/coroutine/
rust-lang/rust@60956837cf s/Generator/Coroutine/
rust-lang/rust@96027d945b Auto merge of #116951 - compiler-errors:ir-file-structure, r=jackh726
rust-lang/rust@c3fd4383fb Move some files around
rust-lang/rust@5ceda6b016 Adjust imports
rust-lang/rust@7db4a89d49 Auto merge of #116966 - clarfonthey:atomic-docs-typo, r=workingjubilee
rust-lang/rust@274455a9d1 Auto merge of #116965 - estebank:issue-65329, r=cjgillot
rust-lang/rust@f31316f7a9 Auto merge of #116962 - estebank:issue-63835, r=oli-obk
rust-lang/rust@c7f3948028 Auto merge of #116946 - compiler-errors:movability-and-mutability, r=lcnr
rust-lang/rust@7849162ace Auto merge of #116899 - compiler-errors:closure-sig-infer, r=lcnr
rust-lang/rust@b9c2d0e4ab Fix typo in atomic docs
rust-lang/rust@029d00c4a3 Auto merge of #116785 - nnethercote:spec-Bytes-read, r=the8472
rust-lang/rust@20de5c762d Move where doc comment meant as comment check
rust-lang/rust@ae466d2d0a Auto merge of #116838 - gurry:116836-dup-macro-invoc-diag, r=petrochenkov
rust-lang/rust@5cee4f305a Auto merge of #116875 - nnethercote:rustc_monomorphize, r=wesleywiser
rust-lang/rust@fd49590ee0 Do not bold main message in --error-format=short
rust-lang/rust@181ce63183 Specialize Bytes<R>::next when R is a BufReader.
rust-lang/rust@e8e9f6a32a Uplift movability and mutability, the simple way
rust-lang/rust@0091166b57 Fix duplicate labels emitted in render_multispan_macro_backtrace()
rust-lang/rust@611766dcee Add a test showing failing closure signature inference in new solver
rust-lang/rust@a145b498e0 Remove UnknownPartitionStrategy error.
rust-lang/rust@4f923376b6 Streamline build_skip_move_check_fns.
rust-lang/rust@55c5ab9fbc Inline and remove item_requires_monomorphization.
rust-lang/rust@42c8803fe8 Remove empty MirUsedCollector::visit_local.
rust-lang/rust@025eb20a86 Remove unneeded dependencies from rustc_monomorphize.