chore(deps): update rust crate moka to v0.12.16

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
moka	dependencies	patch	0.12.15 → 0.12.16

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Release Notes

moka-rs/moka (moka)

v0.12.16

Compare Source

Fixed

• Fixed a bug where cache eviction could stall permanently when the cache was
  configured with the non-default LRU eviction policy (EvictionPolicy::lru())
  by a race between insert and remove operations on the same key
  ([#​592][gh-pull-0592] by [@​kim-jhyeon][gh-kim-jhyeon], reported in
  [#​590][gh-issue-0590]):
  • This bug was introduced in v0.12.0 and affected sync::Cache,
    sync::SegmentedCache and future::Cache.
  • A race between applying a write recording for an entry and concurrently
    removing that entry from the internal concurrent hash table could leave an
    orphaned node at the front of the LRU queue. Once present, no entry was ever
    evicted again and the cache grew unboundedly past max_capacity.
  • The same race also affected the default TinyLFU eviction policy, but with
    a milder symptom: each occurrence permanently leaked one phantom entry
    slot, causing entry_count and weighted_size to over-report and the
    usable capacity to shrink by one entry per occurrence. Fixed by the same
    change.

Changed

• Worked around a ThreadSanitizer false positive ([#​602][gh-pull-0602]):
  • Replaced the standalone fence(Acquire) in the internal MiniArc's drop
    path with an Acquire load of the reference count, so that downstream
    projects can now run ThreadSanitizer on code using Moka without hitting
    this false positive.
  • std::sync::Arc has a similar workaround.
• Raised the minimum version of the crossbeam-epoch crate from v0.9.18 to
  v0.9.20 to avoid the following advisory ([#​603][gh-pull-0603]):
  • [RUSTSEC-2026-0204] crossbeam-epoch: invalid pointer dereference in
    fmt::Pointer for Atomic and Shared
  • Moka is not affected by this advisory because it never formats these
    pointer types. However, raising the minimum version prevents downstream
    lockfiles from resolving to an affected crossbeam-epoch version via
    Moka.

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