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kotlinlang

Hi, I'm running into the error "Unexpected caches clearing" from `FirCachingCompositeSymbolProvider` being called from `afterPhase` to `createCopyWithCleanCaches()`
This is from `arrow-reflection` being upgraded to work with 1.9.20-Beta2 compiler.  The code in arrow is creating a new function when this error happens.

The assert from `FirCompilerRequiredAnnotationsResolveProcessor` method `afterPhase`:
```require(expectedCachesToBeCleanedOnce) { "Unexpected caches clearing" }```
Is protecting against what?  that caches are not cleared more than once?  What is the harm of this being called again?

Symbol providers should always return the same results for the same inputs
But there is one quirk related to annotations resolution, which are required for compiler plugins, so resolution of some names before and after this phase may differ for the same name
And clean caches is called to invalidate potentially incorrect caches after this phase

This function is not intended to be called outside few specific places inside the compier

thanks, the issue is we are compiling fragments during compilation to copy the IR over and in the nested compile hit issues.  Probably not a "designed for" use case yet.