Automatic toolchain upgrade to nightly-2026-01-05

[github-actions]

Update Rust toolchain from nightly-2026-01-04 to nightly-2026-01-05 without any other source changes.

[github-actions]

This is an automatically generated pull request. If any of the CI checks fail,
manual intervention is required. In such a case, review the changes at
https://github.com/rust-lang/rust from
rust-lang/rust@7ecabfa up to
rust-lang/rust@e29fcf4. The log
for this commit range is:

https://github.com/rust-lang/rust/commit/e29fcf45e4 Auto merge of #150674 - matthiaskrgr:rollup-tnkgbcx, r=matthiaskrgr

rust-lang/rust@eeb4431881 Rollup merge of #150671 - RalfJung:miri, r=RalfJung
rust-lang/rust@cdddb85585 Rollup merge of #150660 - Zalathar:pass-nodes, r=davidtwco
rust-lang/rust@18910b7353 Rollup merge of #150619 - cvengler:move-cow-impl, r=Mark-Simulacrum
rust-lang/rust@9dd3b2358e Rollup merge of #150597 - antonilol:extend-from-vec-any-allocator, r=jhpratt
rust-lang/rust@2270553cbe Rollup merge of #150554 - Dushyanthyadav:ice-issue-150409-regression-test, r=davidtwco
rust-lang/rust@5afdf5d8c0 Auto merge of #150669 - Zalathar:rollup-7ar4hqp, r=Zalathar
rust-lang/rust@ff2acf0eca update lockfile
rust-lang/rust@dbf2ef7c45 Merge pull request #4803 from RalfJung/check_only
rust-lang/rust@0557c759a9 add check_only feature for faster check builds
rust-lang/rust@85dc7c2361 Rollup merge of #150666 - reddevilmidzy:fix-link, r=BoxyUwU
rust-lang/rust@db41a1556e Rollup merge of #150659 - mu001999-contrib:fix/150654, r=Urgau
rust-lang/rust@0d7f1e1b48 Rollup merge of #150658 - CieriA:patch-5, r=jhpratt
rust-lang/rust@05dce482d3 Rollup merge of #150650 - enthropy7:main, r=BoxyUwU
rust-lang/rust@f63ab49598 Rollup merge of #150643 - hkBst:cast-slice-from-raw-parts-1, r=tgross35
rust-lang/rust@0f906208b6 Rollup merge of #150642 - hkBst:needless-maybe-sized-1, r=jhpratt
rust-lang/rust@336c6658e4 Rollup merge of #150201 - Enselic:debugger-tests-revisions-2, r=Zalathar
rust-lang/rust@f8b1d59a81 Auto merge of #146341 - Qelxiros:dirfd-minimum, r=tgross35
rust-lang/rust@f65c5812c7 Merge pull request #4802 from rust-lang/rustup-2026-01-04
rust-lang/rust@7c02e3c6eb Fix ambig-unambig-ty-and-consts link
rust-lang/rust@f280e764d5 Auto merge of #150595 - antonilol:deque_extend_front_prepend_drain_spec, r=jhpratt
rust-lang/rust@bd26cf72d4 Merge ref 'f57b9e6f565a' from rust-lang/rust
rust-lang/rust@de377241fb Prefer to pass HIR nodes instead of loose types/spans
rust-lang/rust@52d65b8a62 library: clarify panic conditions in Iterator::last
rust-lang/rust@e25ee6bac4 Auto merge of #150655 - matthiaskrgr:rollup-8oshivb, r=matthiaskrgr
rust-lang/rust@c0c4525cd3 Rollup merge of #150651 - Sekar-C-Mca:fix-pattern-usefulness-typo, r=nnethercote
rust-lang/rust@24ba7d8651 Rollup merge of #150596 - reddevilmidzy:add-tracking, r=BoxyUwU
rust-lang/rust@f57b9e6f56 Auto merge of #150564 - rwardd:rwardd/option_or_codegen_tests, r=scottmcm