This code may be called during status resolution, but
it can also be called during `COMPILER_REQUIRED_ANNOTATIONS`.
In the latter case we can't expand typealiases.
If we do try to expand typealiases if we can,
and leave them unexpanded otherwise, then we
still may have a problem. Consider the
FirBlackBoxCodegenTestGenerated.Reflection.Annotations.Repeatable
.testKotlinAnnotation test.
In this test we get the following cycle:
```
import kotlin.annotation.AnnotationTarget.* // <- requires TYPEALIAS
@SinceKotlin("1.1") // <- requires String
AnnotationTarget.TYPEALIAS
@IntrinsicConstEvaluation // <- fully expanding this requires
fun String.compareTo() // building it
@Target(AnnotationTarget.CONSTRUCTOR) // <- requires
annotation class IntrinsicConstEvaluation // AnnotationTarget
// in general
// The cycle repeats
```
Or in words if the picture isn't clear:
- Transform `import kotlin.annotation.AnnotationTarget.*`
- Find and deserialize class `kotlin/annotation/AnnotationTarget`
- Load the `TYPEALIAS` field
- Load its annotation `@SinceKotlin("1.1")`
- Find and deserialize `kotlin/String` for `"1.1"`
- Load `String.compareTo`
- Load its annotation `kotlin/internal/IntrinsicConstEvaluation`
>>> At this moment the `extractDeprecationAnnotationInfoPerUseSite`
function is called, and ideally we'd want to fullyExpand
`IntrinsicConstEvaluation`
- While calling `toAnnotationClassId` for it, we find and deserialize
`IntrinsicConstEvaluation`
- `IntrinsicConstEvaluation` has `@Target`
- At this moment we find and deserialize `AnnotationTarget` again.
But This time loading `@SinceKotlin("1.1")` succeeds,
because when loading `kotlin/String` we first create the symbol, then
cache it, then call `postCompute`.
It does not happen with `AnnotationTarget`, because it calls
`findAndDeserializeClass` during `createValue`,
not `postCompute`.
- Thus, we have duplicate `AnnotationClass`-es, and they fail in fir2ir
with "symbol is already bound"
We can't move `findAndDeserializeClass` into `postCompute`, because
during this process when we try to access the
already created and cached symbol for `AnnotationTarget`
(with yet empty fir) we are trying to build the declared member scope
by this `symbol.fir`.
Nikolay Lunyak
aaf30c2695