KSAnnotation.toAnnotationSpec() fails if the KSAnnotation is a typealias to another Annotation

[milis92]

Describe the bug

Consider following scenario:

annotation class SomeAnnotation
typealias SomeOtherAnnotation = SomeAnnotation

@SomeOtherAnnotation
fun doSomething() {
}

Calling KSAnnotation.toAnnotationSpec() on the doSomething function annotations, KSP will throw:

e: java.lang.ClassCastException: class com.google.devtools.ksp.impl.symbol.kotlin.KSTypeAliasImpl cannot be cast to class com.google.devtools.ksp.symbol.KSClassDeclaration (com.google.devtools.ksp.impl.symbol.kotlin.KSTypeAliasImpl and com.google.devtools.ksp.symbol.KSClassDeclaration are in unnamed module of loader 'app')
	at com.squareup.kotlinpoet.ksp.AnnotationsKt.toAnnotationSpec(Annotations.kt:48)
	at com.squareup.kotlinpoet.ksp.AnnotationsKt.toAnnotationSpec$default(Annotations.kt:35)...

Expected behavior

• I would expect this to work, without errors.
• KSAnnotation.toAnnotationSpec() should return resolved annotation

Additional context

kotlinpoet/interop/ksp/src/main/kotlin/com/squareup/kotlinpoet/ksp/Annotations.kt

Line 48 in 79ec8a4

val params = (annotationType.resolve().declaration as KSClassDeclaration).primaryConstructor?.parameters.orEmpty()

This seems like it should be a safe cast to KSClassDeclaration

[ZacSweers]

Thanks for the report, I've got a branch with a fix in the works