Miri subtree update

[RalfJung]

r? @ghost

[rustbot]

These commits modify the Cargo.lock file. Unintentional changes to Cargo.lock can be introduced when switching branches and rebasing PRs.

If this was unintentional then you should revert the changes before this PR is merged.
Otherwise, you can ignore this comment.

The Miri subtree was changed

cc @rust-lang/miri

[RalfJung]

CI looking good. @bors r+ p=1

[bors]

📌 Commit 6687c07 has been approved by RalfJung

It is now in the queue for this repository.

[bors]

⌛ Testing commit 6687c07 with merge 7c3eeb9...

[bors]

☀️ Test successful - checks-actions
Approved by: RalfJung
Pushing 7c3eeb9 to master...

[rust-timer]

Finished benchmarking commit (7c3eeb9): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.3%	[-2.4%, -2.1%]	2
All ❌✅ (primary)	-	-	0

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 632.004s -> 630.594s (-0.22%)
Artifact size: 317.42 MiB -> 317.44 MiB (0.01%)

[RalfJung]

@eduardosm your recent intrinsic PRs are included in this one, so at least one FIXME in miri-test-libstd can be removed now I think. :)