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Hi! I am working on a compiler plugin, which among...
# compiler
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Hi! I am working on a compiler plugin, which among other things, need to generate an override for this property, inherited from a base class:
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@property:Internal
    val properties: List<FeatureDescription>
The override should define a getter, something equivalent to:
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@property:Internal
    override val properties: List<FeatureDescription>
       get() = listOf(/*depending on some logic*/)
I am trying to do that in this way:
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val propertySignature = IdSignature.CommonSignature(irClass.kotlinFqName.asString(), "properties", null, 0, )
val propertiesSymbol = IrPropertyPublicSymbolImpl(propertySignature)
val origin = IrDeclarationOrigin.GeneratedByPlugin(StarLasuGeneratedDeclarationKey)
val propertiesDecl = IrPropertyImpl(0, 0, origin, propertiesSymbol, Name.identifier("properties"),
    DescriptorVisibilities.PUBLIC, Modality.OPEN, false, false, false, false, false)
propertiesDecl.parent = irClass
val accessorSignature =
    IdSignature.CommonSignature(
        packageFqName = irClass.kotlinFqName.asString(),
        declarationFqName = "${irClass.kotlinFqName.asString()}.properties.get",
        id = null,
        mask = 0,
        description = null,
    )
val propertiesGetterSymbol = IrSimpleFunctionPublicSymbolImpl(IdSignature.AccessorSignature(propertySignature, accessorSignature))

val listClassifierSymbol : IrClassifierSymbol = List::class.classifierSymbol
val featureDescription : IrTypeArgument = IrSimpleTypeImpl(null, FeatureDescription::class.classifierSymbol, SimpleTypeNullability.DEFINITELY_NOT_NULL, emptyList(), emptyList())
val propertiesType : IrType = IrSimpleTypeImpl(null, listClassifierSymbol, SimpleTypeNullability.DEFINITELY_NOT_NULL, listOf(featureDescription), emptyList())
propertiesDecl.getter = IrFunctionImpl(0, 0, origin, propertiesGetterSymbol, Name.special("<get>"),
    DescriptorVisibilities.PUBLIC, Modality.OPEN, propertiesType,false, false, false, false, false, false, false)
// TODO: write the body of the getter    
irClass.declarations.add(propertiesDecl)
However when using the plugin I get this error:
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e: org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during IR lowering
File being compiled: /Users/federico/repos/kolasu-mp-example/src/commonMain/kotlin/AST.kt
The root cause java.lang.IllegalStateException was thrown at: org.jetbrains.kotlin.ir.symbols.impl.IrBindablePublicSymbolBase.getOwner(IrPublicSymbolBase.kt:63)
        at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException(CodegenUtil.kt:253)
        at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException$default(CodegenUtil.kt:236)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invokeSequential(performByIrFile.kt:65)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:52)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:38)
        at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.phaseBody(CompilerPhase.kt:166)
        at org.jetbrains.kotlin.backend.common.phaser.AbstractNamedCompilerPhase.invoke(CompilerPhase.kt:113)
        at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:30)
        at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:17)
        at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.phaseBody(CompilerPhase.kt:166)
        at org.jetbrains.kotlin.backend.common.phaser.AbstractNamedCompilerPhase.invoke(CompilerPhase.kt:113)
        at org.jetbrains.kotlin.backend.common.phaser.CompilerPhaseKt.invokeToplevel(CompilerPhase.kt:62)
        at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.invokeLowerings(JvmIrCodegenFactory.kt:347)
        at org.jetbrains.kotlin.codegen.CodegenFactory.generateModule(CodegenFactory.kt:44)
        at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.generateModuleInFrontendIRMode(JvmIrCodegenFactory.kt:378)
        at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.CompilerPipelineKt.generateCodeFromIr(compilerPipeline.kt:260)
        at org.jetbrains.kotlin.cli.jvm.compiler.pipeline.CompilerPipelineKt.compileModulesUsingFrontendIrAndLightTree(compilerPipeline.kt:151)
        at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:156)
        at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:50)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:104)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:48)
        at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
        at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:456)
        at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:62)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:479)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:402)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileNonIncrementally(IncrementalCompilerRunner.kt:283)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:125)
        at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:691)
        at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:103)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1678)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:714)
        at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:598)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:844)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:721)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:720)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
        at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.IllegalStateException: Symbol for kotlin.collections/List|null[0] is unbound
        at org.jetbrains.kotlin.ir.symbols.impl.IrBindablePublicSymbolBase.getOwner(IrPublicSymbolBase.kt:63)
        at org.jetbrains.kotlin.backend.jvm.ir.JvmIrTypeUtilsKt.getErasedUpperBound(JvmIrTypeUtils.kt:95)
        at org.jetbrains.kotlin.backend.jvm.ir.JvmIrTypeUtilsKt.isInlineClassType(JvmIrTypeUtils.kt:130)
        at org.jetbrains.kotlin.backend.jvm.InlineClassAbiKt.getHasMangledReturnType(InlineClassAbi.kt:159)
        at org.jetbrains.kotlin.backend.jvm.MemoizedInlineClassReplacements.getNeedsReplacement(MemoizedInlineClassReplacements.kt:92)
        at org.jetbrains.kotlin.backend.jvm.MemoizedInlineClassReplacements.access$getNeedsReplacement(MemoizedInlineClassReplacements.kt:31)
        at org.jetbrains.kotlin.backend.jvm.MemoizedInlineClassReplacements$getReplacementFunctionImpl$1.invoke(MemoizedInlineClassReplacements.kt:83)
        at org.jetbrains.kotlin.backend.jvm.MemoizedInlineClassReplacements$getReplacementFunctionImpl$1.invoke(MemoizedInlineClassReplacements.kt:47)
        at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:578)
        at org.jetbrains.kotlin.backend.jvm.MemoizedValueClassAbstractReplacements.getReplacementFunction(MemoizedValueClassAbstractReplacements.kt:32)
        at org.jetbrains.kotlin.backend.jvm.lower.JvmValueClassAbstractLowering.transformFunctionFlat(JvmValueClassAbstractLowering.kt:36)
        at org.jetbrains.kotlin.backend.jvm.lower.JvmInlineClassLowering$visitClassNew$2.invoke(JvmInlineClassLowering.kt:96)
        at org.jetbrains.kotlin.backend.jvm.lower.JvmInlineClassLowering$visitClassNew$2.invoke(JvmInlineClassLowering.kt:93)
        at org.jetbrains.kotlin.ir.util.TransformKt.transformDeclarationsFlat(transform.kt:105)
        at org.jetbrains.kotlin.backend.jvm.lower.JvmInlineClassLowering.visitClassNew(JvmInlineClassLowering.kt:93)
        at org.jetbrains.kotlin.backend.jvm.lower.JvmInlineClassLowering.visitClassNew(JvmInlineClassLowering.kt:53)
        at org.jetbrains.kotlin.backend.common.IrElementTransformerVoidWithContext.visitClass(IrElementTransformerVoidWithContext.kt:62)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitClass(IrElementTransformerVoid.kt:57)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitClass(IrElementTransformerVoid.kt:19)
        at org.jetbrains.kotlin.ir.declarations.IrClass.accept(IrClass.kt:74)
        at org.jetbrains.kotlin.ir.IrElementBase.transform(IrElementBase.kt:24)
        at org.jetbrains.kotlin.ir.util.TransformKt.transformInPlace(transform.kt:35)
        at org.jetbrains.kotlin.ir.declarations.IrFile.transformChildren(IrFile.kt:40)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoidKt.transformChildrenVoid(IrElementTransformerVoid.kt:565)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.transformChildrenVoid(IrElementTransformerVoid.kt:28)
        at org.jetbrains.kotlin.backend.jvm.lower.JvmValueClassAbstractLowering.lower(JvmValueClassAbstractLowering.kt:24)
        at org.jetbrains.kotlin.backend.common.phaser.PhaseBuildersKt$makeIrFilePhase$2.invoke(PhaseBuilders.kt:136)
        at org.jetbrains.kotlin.backend.common.phaser.PhaseBuildersKt$makeIrFilePhase$2.invoke(PhaseBuilders.kt:128)
        at org.jetbrains.kotlin.backend.common.phaser.PhaseBuildersKt$createSimpleNamedCompilerPhase$1.phaseBody(PhaseBuilders.kt:72)
        at org.jetbrains.kotlin.backend.common.phaser.SimpleNamedCompilerPhase.phaseBody(CompilerPhase.kt:226)
        at org.jetbrains.kotlin.backend.common.phaser.AbstractNamedCompilerPhase.invoke(CompilerPhase.kt:113)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invokeSequential(performByIrFile.kt:62)
        ... 43 more
I am not sure what it means that the symbol is unbound. Also, I am not sure if they problem is with List or with its parameter (FeatureDescription). Do you have any advice on how to fix this? Is there a way to write this code more easily?
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