Rollup of 10 pull requests

[matthiaskrgr]

Successful merges:

• Enable u64 limbs in core::num::bignum #146277 (Enable u64 limbs in core::num::bignum)
• constify basic Clone impls #146976 (constify basic Clone impls)
• Do two passes of handle_opaque_type_uses_next #147249 (Do two passes of handle_opaque_type_uses_next)
• fix 2 search graph bugs #147266 (fix 2 search graph bugs)
• proc_macro cleanups (3/N) #147497 (proc_macro cleanups (3/N))
• Fix ICE for never pattern as closure parameters #147548 (Fix ICE for never pattern as closure parameters)
• std: implement pal::os::exit for VEXos #147594 (std: implement pal::os::exit for VEXos)
• GVN: Invalidate derefs at loop headers #147607 (GVN: Invalidate derefs at loop headers)
• Avoid redundant UB check in RangeFrom slice indexing #147620 (Avoid redundant UB check in RangeFrom slice indexing)
• Hide vendoring and copyright in GHA group #147647 (Hide vendoring and copyright in GHA group)

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

[rustbot]

r? @lcnr

rustbot has assigned @lcnr.
They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

Use r? to explicitly pick a reviewer

[rustbot]

⚠️Warning⚠️

• The following commits have merge commits (commits with multiple parents) in your changes. We have a no merge policy so these commits will need to be removed for this pull request to be merged.

  • 18035ca
  • 3ee0174
  • a6af573
  • bce3454
  • d83bc18

  You can start a rebase with the following commands:

  $ # rebase
  $ git pull --rebase https://github.com/rust-lang/rust.git master
  $ git push --force-with-lease
  

[matthiaskrgr]

@bors r+ rollup=never p=5

[bors]

📌 Commit 3ee0174 has been approved by matthiaskrgr

It is now in the queue for this repository.

[Zalathar]

Something went wrong with the creation of this rollup.

@bors r-

[rustbot]

Error: Assignment is not allowed on a closed PR.

Please file an issue on GitHub at triagebot if there's a problem with this bot, or reach out on #triagebot on Zulip.