On Apple (iOS/macOS) and Linux targets, LargeCache.forEach() iterates
the underlying map directly. When another coroutine modifies the map
during iteration (e.g., NostrClient.syncFilters running while
subscriptions are added), a ConcurrentModificationException is thrown.
On JVM/Android this is not an issue because ConcurrentSkipListMap
handles concurrent iteration safely. On Kotlin/Native (iOS), this
exception is fatal — K/N calls abort() for unhandled exceptions,
crashing the app immediately after account creation when relays
connect and subscriptions start syncing.
Fix: call .entries.toList() before iterating to create a snapshot,
matching the JVM behavior where concurrent modifications during
iteration are tolerated.
M
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