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NPE in SerializableIrGenerator

See original GitHub issue

Serialization produces a NullPointerException during compilation on 1.1.0, which did not happen in 1.0.1. The stacktrace doesn’t reference any of my code so it’s hard for me to tell what I may be doing wrong that causes it.

Strack trace 
e: java.lang.NullPointerException
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator.getSerialDescriptorExpr(SerializableIrGenerator.kt:227)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator.generateOptimizedGoldenMaskCheck(SerializableIrGenerator.kt:170)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator.access$generateOptimizedGoldenMaskCheck(SerializableIrGenerator.kt:37)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator$generateInternalConstructor$1.invoke(SerializableIrGenerator.kt:89)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator$generateInternalConstructor$1.invoke(SerializableIrGenerator.kt:71)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.IrBuilderExtension$DefaultImpls.contributeConstructor(GeneratorHelpers.kt:68)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator.contributeConstructor(SerializableIrGenerator.kt:37)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.IrBuilderExtension$DefaultImpls.contributeConstructor$default(GeneratorHelpers.kt:58)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator.generateInternalConstructor(SerializableIrGenerator.kt:71)
	at org.jetbrains.kotlinx.serialization.compiler.backend.common.SerializableCodegen.generateSyntheticInternalConstructor(SerializableCodegen.kt:40)
	at org.jetbrains.kotlinx.serialization.compiler.backend.common.SerializableCodegen.generate(SerializableCodegen.kt:29)
	at org.jetbrains.kotlinx.serialization.compiler.backend.ir.SerializableIrGenerator$Companion.generate(SerializableIrGenerator.kt:361)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializerClassLowering.lower(SerializationLoweringExtension.kt:52)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:37)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitClass(IrElementVisitorVoid.kt:44)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.declarations.IrClass.accept(IrClass.kt:55)
	at org.jetbrains.kotlin.ir.expressions.IrBlockBody.acceptChildren(IrBody.kt:57)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoidKt.acceptChildrenVoid(IrElementVisitorVoid.kt:275)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitElement(SerializationLoweringExtension.kt:33)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitBody(IrElementVisitorVoid.kt:86)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitBody(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitBlockBody(IrElementVisitorVoid.kt:92)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitBlockBody(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitBlockBody(IrElementVisitorVoid.kt:93)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitBlockBody(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitBlockBody(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.expressions.IrBlockBody.accept(IrBody.kt:54)
	at org.jetbrains.kotlin.ir.declarations.IrFunction.acceptChildren(IrFunction.kt:61)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoidKt.acceptChildrenVoid(IrElementVisitorVoid.kt:275)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitElement(SerializationLoweringExtension.kt:33)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitDeclaration(IrElementVisitorVoid.kt:40)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitDeclaration(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitFunction(IrElementVisitorVoid.kt:49)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitFunction(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitSimpleFunction(IrElementVisitorVoid.kt:52)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitSimpleFunction(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitSimpleFunction(IrElementVisitorVoid.kt:53)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitSimpleFunction(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitSimpleFunction(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.declarations.IrSimpleFunction.accept(IrSimpleFunction.kt:28)
	at org.jetbrains.kotlin.ir.declarations.IrClass.acceptChildren(IrClass.kt:60)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoidKt.acceptChildrenVoid(IrElementVisitorVoid.kt:275)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:38)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitClass(IrElementVisitorVoid.kt:44)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.declarations.IrClass.accept(IrClass.kt:55)
	at org.jetbrains.kotlin.ir.declarations.IrClass.acceptChildren(IrClass.kt:60)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoidKt.acceptChildrenVoid(IrElementVisitorVoid.kt:275)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:38)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitClass(IrElementVisitorVoid.kt:44)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitClass(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.declarations.IrClass.accept(IrClass.kt:55)
	at org.jetbrains.kotlin.ir.declarations.impl.IrFileImpl.acceptChildren(IrFileImpl.kt:66)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoidKt.acceptChildrenVoid(IrElementVisitorVoid.kt:275)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitElement(SerializationLoweringExtension.kt:33)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitPackageFragment(IrElementVisitorVoid.kt:30)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitPackageFragment(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitFile(IrElementVisitorVoid.kt:37)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitFile(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoid$DefaultImpls.visitFile(IrElementVisitorVoid.kt:38)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitFile(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt$runOnFileInOrder$1.visitFile(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlin.ir.declarations.impl.IrFileImpl.accept(IrFileImpl.kt:63)
	at org.jetbrains.kotlin.ir.visitors.IrElementVisitorVoidKt.acceptVoid(IrElementVisitorVoid.kt:271)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtensionKt.runOnFileInOrder(SerializationLoweringExtension.kt:31)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationLoweringExtension.generate(SerializationLoweringExtension.kt:71)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory$generateModule$1.invoke(JvmIrCodegenFactory.kt:93)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory$generateModule$1.invoke(JvmIrCodegenFactory.kt:89)
	at org.jetbrains.kotlin.psi2ir.Psi2IrTranslator.generateModuleFragment(Psi2IrTranslator.kt:91)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.generateModule(JvmIrCodegenFactory.kt:106)
	at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:35)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.kt:595)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:211)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:154)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:169)
	at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:52)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:88)
	at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:44)
	at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:98)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:386)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:110)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:286)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl$rebuild(IncrementalCompilerRunner.kt:99)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:114)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:74)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:607)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:96)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1659)
	at jdk.internal.reflect.GeneratedMethodAccessor118.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
	at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:691)
	at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:587)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:828)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:705)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
	at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:704)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)
	at java.base/java.lang.Thread.run(Thread.java:831)

To Reproduce I don’t have an easy way to reproduce since the stack trace doesn’t help me narrow down the cause. In case it’s helpful, I see the error when upgrading my project from 1.0.1 to 1.1.0. This branch can reproduce the issue by running ./gradlew compileKotlin.

Expected behavior Compile successfully, as 1.0.1 does.

Environment

  • Kotlin version: 1.4.32
  • Library version: 1.1.0
  • Kotlin platforms: JVM
  • Gradle version: 7.0
  • Happens on both new Kotlin IR backend and the default Kotlin/JVM backend

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:5 (3 by maintainers)

github_iconTop GitHub Comments

2reactions
qwwdfsadcommented, Apr 20, 2021

A clear error message instead of NPE is added to Kotlin 1.5.20

1reaction
shanshincommented, Apr 19, 2021

Serialization doesn’t support local or inner classes. In your project you have several local classes, e.g. com.dzirbel.kotify.network.Spotify.Player#startPlayback.Body. You need to move them to the class or file level.

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