Dokka fails with not array: KClass<out Annotation> on Kotlin 2.1.20-dev with @SubclassOptInRequired

[sandwwraith]

Describe the bug

* What went wrong:
Execution failed for task ':kotlinx-serialization-cbor:dokkaHtmlPartial'.
> not array: KClass<out Annotation>

* Try:
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':kotlinx-serialization-cbor:dokkaHtmlPartial'.
... 
Caused by: java.lang.IllegalStateException: not array: KClass<out Annotation>
        at org.jetbrains.kotlin.builtins.KotlinBuiltIns.getArrayElementType(KotlinBuiltIns.java:602)
        at org.jetbrains.kotlin.serialization.deserialization.AnnotationDeserializer.doesValueConformToExpectedType(AnnotationDeserializer.kt:111)
        at org.jetbrains.kotlin.serialization.deserialization.AnnotationDeserializer.resolveValueAndCheckExpectedType(AnnotationDeserializer.kt:66)
        at org.jetbrains.kotlin.serialization.deserialization.AnnotationDeserializer.resolveArgument(AnnotationDeserializer.kt:61)
        at org.jetbrains.kotlin.serialization.deserialization.AnnotationDeserializer.deserializeAnnotation(AnnotationDeserializer.kt:48)
        at org.jetbrains.kotlin.serialization.deserialization.AnnotationAndConstantLoaderImpl.loadAnnotation(AnnotationAndConstantLoaderImpl.kt:38)
        at org.jetbrains.kotlin.serialization.deserialization.AnnotationAndConstantLoaderImpl.loadAnnotation(AnnotationAndConstantLoaderImpl.kt:29)
        at org.jetbrains.kotlin.serialization.deserialization.AbstractAnnotationLoader.loadClassAnnotations(AbstractAnnotationLoader.kt:18)
        at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor.annotations$lambda$5(DeserializedClassDescriptor.kt:98)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java:408)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$LockBasedNotNullLazyValue.invoke(LockBasedStorageManager.java:527)
        at org.jetbrains.kotlin.storage.StorageKt.getValue(storage.kt:42)
        at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedAnnotations.getAnnotations(DeserializedAnnotations.kt:28)
        at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedAnnotations.iterator(DeserializedAnnotations.kt:32)
        at org.jetbrains.kotlin.descriptors.annotations.Annotations$DefaultImpls.findAnnotation(Annotations.kt:124)
        at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedAnnotations.findAnnotation(DeserializedAnnotations.kt:24)
        at org.jetbrains.kotlin.resolve.SinceKotlinUtilKt.getOwnSinceKotlinVersion$consider(sinceKotlinUtil.kt:75)
        at org.jetbrains.kotlin.resolve.SinceKotlinUtilKt.getOwnSinceKotlinVersion(sinceKotlinUtil.kt:85)
        at org.jetbrains.kotlin.resolve.SinceKotlinUtilKt.checkSinceKotlinVersionAccessibility(sinceKotlinUtil.kt:34)
        at org.jetbrains.kotlin.resolve.deprecation.DeprecationResolver.isHiddenBecauseOfKotlinVersionAccessibility$lambda$3(DeprecationResolver.kt:117)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:578)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunctionToNotNull.invoke(LockBasedStorageManager.java:681)
        at org.jetbrains.kotlin.resolve.deprecation.DeprecationResolver.isHiddenInResolution(DeprecationResolver.kt:159)
        at org.jetbrains.kotlin.resolve.deprecation.DeprecationResolver.isHiddenInResolution(DeprecationResolver.kt:145)
        at org.jetbrains.kotlin.resolve.deprecation.DeprecationResolver.isHiddenInResolution$default(DeprecationResolver.kt:137)
        at org.jetbrains.kotlin.resolve.lazy.LazyImportScope.isClassifierVisible(LazyImportScope.kt:253)
        at org.jetbrains.kotlin.resolve.lazy.LazyImportScope.getClassifier$lambda$0(LazyImportScope.kt:280)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager.compute(LockBasedStorageManager.java:290)
        at org.jetbrains.kotlin.resolve.lazy.LazyImportScope.getClassifier(LazyImportScope.kt:274)
        at org.jetbrains.kotlin.resolve.lazy.LazyImportScope.getContributedClassifier(LazyImportScope.kt:270)
        at org.jetbrains.kotlin.resolve.scopes.ResolutionScope$DefaultImpls.getContributedClassifierIncludeDeprecated(ResolutionScope.kt:40)
        at org.jetbrains.kotlin.resolve.scopes.HierarchicalScope$DefaultImpls.getContributedClassifierIncludeDeprecated(Scopes.kt:27)
        at org.jetbrains.kotlin.resolve.scopes.ImportingScope$DefaultImpls.getContributedClassifierIncludeDeprecated(Scopes.kt:113)
        at org.jetbrains.kotlin.resolve.lazy.LazyImportScope.getContributedClassifierIncludeDeprecated(LazyImportScope.kt:235)
        at org.jetbrains.kotlin.resolve.scopes.utils.ScopeUtilsKt.findFirstClassifierWithDeprecationStatus(ScopeUtils.kt:119)
        at org.jetbrains.kotlin.resolve.QualifiedExpressionResolver.findClassifierAndReportDeprecationIfNeeded(QualifiedExpressionResolver.kt:71)
        at org.jetbrains.kotlin.resolve.QualifiedExpressionResolver.resolveDescriptorForType(QualifiedExpressionResolver.kt:95)
        at org.jetbrains.kotlin.resolve.TypeResolver.resolveDescriptorForType(TypeResolver.kt:1053)
        at org.jetbrains.kotlin.resolve.TypeResolver$resolveTypeElement$1.visitUserType(TypeResolver.kt:259)
        at org.jetbrains.kotlin.psi.KtVisitorVoid.visitUserType(KtVisitorVoid.java:937)
        at org.jetbrains.kotlin.psi.KtVisitorVoid.visitUserType(KtVisitorVoid.java:21)
        at org.jetbrains.kotlin.psi.KtUserType.accept(KtUserType.java:42)
        at org.jetbrains.kotlin.psi.KtElementImplStub.accept(KtElementImplStub.java:49)
        at org.jetbrains.kotlin.resolve.TypeResolver.resolveTypeElement(TypeResolver.kt:257)
        at org.jetbrains.kotlin.resolve.TypeResolver.resolvePossiblyBareType(TypeResolver.kt:136)
        at org.jetbrains.kotlin.resolve.TypeResolver.resolveType(TypeResolver.kt:126)
        at org.jetbrains.kotlin.resolve.TypeResolver.resolveType(TypeResolver.kt:97)
        at org.jetbrains.kotlin.resolve.FunctionDescriptorResolver.initializeFunctionDescriptorAndExplicitReturnType(FunctionDescriptorResolver.kt:197)
        at org.jetbrains.kotlin.resolve.FunctionDescriptorResolver.resolveFunctionDescriptor(FunctionDescriptorResolver.kt:132)
        at org.jetbrains.kotlin.resolve.FunctionDescriptorResolver.resolveFunctionDescriptor(FunctionDescriptorResolver.kt:96)
        at org.jetbrains.kotlin.resolve.lazy.descriptors.AbstractLazyMemberScope.getDeclaredFunctions(AbstractLazyMemberScope.kt:120)
        at org.jetbrains.kotlin.resolve.lazy.descriptors.AbstractLazyMemberScope.declaredFunctionDescriptors$lambda$5(AbstractLazyMemberScope.kt:58)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:578)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunctionToNotNull.invoke(LockBasedStorageManager.java:681)
        at org.jetbrains.kotlin.resolve.lazy.descriptors.AbstractLazyMemberScope.doGetFunctions(AbstractLazyMemberScope.kt:101)
        at org.jetbrains.kotlin.resolve.lazy.descriptors.AbstractLazyMemberScope.functionDescriptors$lambda$1(AbstractLazyMemberScope.kt:51)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:578)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunctionToNotNull.invoke(LockBasedStorageManager.java:681)
        at org.jetbrains.kotlin.resolve.lazy.descriptors.AbstractLazyMemberScope.getContributedFunctions(AbstractLazyMemberScope.kt:97)
        at org.jetbrains.kotlin.resolve.lazy.descriptors.AbstractLazyMemberScope.computeDescriptorsFromDeclaredElements(AbstractLazyMemberScope.kt:242)
        at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyPackageMemberScope.getContributedDescriptors(LazyPackageMemberScope.kt:44)
        at org.jetbrains.kotlin.resolve.scopes.ResolutionScope$DefaultImpls.getContributedDescriptors$default(ResolutionScope.kt:50)
        at org.jetbrains.dokka.analysis.kotlin.descriptors.compiler.translator.DokkaDescriptorVisitor.getDescriptorsWithKind(DefaultDescriptorToDocumentableTranslator.kt:893)
        at org.jetbrains.dokka.analysis.kotlin.descriptors.compiler.translator.DokkaDescriptorVisitor.access$getDescriptorsWithKind(DefaultDescriptorToDocumentableTranslator.kt:159)
        at org.jetbrains.dokka.analysis.kotlin.descriptors.compiler.translator.DokkaDescriptorVisitor$visitPackageFragmentDescriptor$2.invokeSuspend(DefaultDescriptorToDocumentableTranslator.kt:189)

To Reproduce
Failed build: https://teamcity.jetbrains.com/buildConfiguration/KotlinTools_KotlinxSerialization_SandboxSerializationXKotlinMasterLinux/4832392?hideTestsFromDependencies=false&hideProblemsFromDependencies=false&expandBuildDeploymentsSection=false&expandBuildChangesSection=true&expandBuildProblemsSection=true

Branch with a reproducer (uses 2.1.20-dev-933): https://github.com/Kotlin/kotlinx.serialization/tree/dokka-2.1-failure

Failure does not happen on dev even when Kotlin 2.1.20-dev is used, likely because dev does not use new @SubclassOptInRequired annotation, while my branch does. Error does not happen on 2.0.20 in any case.

So, it likely is caused by some changes in the Kotlin compiler (or lack thereof, since Dokka still uses the K1 analyzer).

Dokka configuration
Configuration of dokka used to reproduce the bug

Dokka 1.9.20 or 2.0.0-Beta both show error. I wasn't able to try new K2 mode (org.jetbrains.dokka.experimental.gradle.pluginMode=V2EnabledWithHelpers) because of https://youtrack.jetbrains.com/issue/KT-72000 — workarounding this would require full migration.

Installation

• Build tool: Gradle v8.7

[sandwwraith]

Workaround: use Dokka K2 analyzer with org.jetbrains.dokka.experimental.tryK2=true