fix: L1 crash when serialize: false with L2 cache

[thisisnkc]

Problem

When using a two-tier cache with serialize: false on the L1 memory driver, reading a value that exists only in L2 causes a crash on subsequent L1 reads:

TypeError: Cannot read properties of undefined (reading 'deserialize')

Root cause: During L2-to-L1 refill, the code unconditionally called entry.serialize(), storing a serialized string into L1. Since L1 has no deserializer when serialize: false, the next read from L1 crashes in CacheEntry.fromDriver().

This affected three code paths:

• cache.get() - L2 hit refill to L1
• cache.get() - graced L2 value refill to L1
• cache.getOrSet() via TwoTierHandler.#returnRemoteCacheValue()

Fix

• Extracted toRaw() method from CacheEntry.serialize() to return the plain object without serialization
• Added prepareForL1(entry) helper on CacheStack that returns entry.serialize() or entry.toRaw() based on the serializeL1 option
• Replaced all three L2-to-L1 refill paths to use prepareForL1() instead of unconditional serialize()

Tests added

• L2 hit should correctly refill L1 when serialize is false — cache.get() path: L2 hit refills L1, subsequent L1 read works and stores an object (not a string)
• getOrSet L2 hit should correctly refill L1 when serialize is false — cache.getOrSet() path: L2 hit refills L1, subsequent call reads from L1 without error

Closes #111

[changeset-bot]

🦋 Changeset detected

Latest commit: e499df6

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
bentocache	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR