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```org.jetbrains.kotlin.codegen.CompilationExcepti...
# serialization
t
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org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: Failed to generate expression: KtNameReferenceExpression
File being compiled: (40,39) in D:/work/workspace/boardgames/games/turingresistance/src/commonMain/kotlin/house/boardgames/games/turingresistance/model/deck/store/CardStore.kt
The root cause java.lang.UnsupportedOperationException was thrown at: org.jetbrains.kotlin.codegen.context.CodegenContext.getOuterExpression(CodegenContext.java:222)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.genQualified(ExpressionCodegen.java:335)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.genQualified(ExpressionCodegen.java:293)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.gen(ExpressionCodegen.java:414)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.gen(ExpressionCodegen.java:422)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.gen(ExpressionCodegen.java:418)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializableCodegenImpl.genInitProperty(SerializableCodegenImpl.kt:279)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializableCodegenImpl.doGenerateConstructorImpl(SerializableCodegenImpl.kt:218)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializableCodegenImpl.access$doGenerateConstructorImpl(SerializableCodegenImpl.kt:38)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializableCodegenImpl$generateInternalConstructor$1.invoke(SerializableCodegenImpl.kt:81)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializableCodegenImpl$generateInternalConstructor$1.invoke(SerializableCodegenImpl.kt:38)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.JVMCodegenUtilKt$generateMethod$1.doGenerateBody(JVMCodegenUtil.kt:141)
	at org.jetbrains.kotlin.codegen.FunctionGenerationStrategy$CodegenBased.generateBody(FunctionGenerationStrategy.java:86)
	at org.jetbrains.kotlin.codegen.FunctionCodegen.generateMethodBody(FunctionCodegen.java:648)
	at org.jetbrains.kotlin.codegen.FunctionCodegen.generateMethodBody(FunctionCodegen.java:483)
	at org.jetbrains.kotlin.codegen.FunctionCodegen.generateMethod(FunctionCodegen.java:259)
	at org.jetbrains.kotlin.codegen.FunctionCodegen.generateMethod(FunctionCodegen.java:164)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.JVMCodegenUtilKt.generateMethod(JVMCodegenUtil.kt:138)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializableCodegenImpl.generateInternalConstructor(SerializableCodegenImpl.kt:81)
	at org.jetbrains.kotlinx.serialization.compiler.backend.common.SerializableCodegen.generateSyntheticInternalConstructor(SerializableCodegen.kt:41)
	at org.jetbrains.kotlinx.serialization.compiler.backend.common.SerializableCodegen.generate(SerializableCodegen.kt:33)
	at org.jetbrains.kotlinx.serialization.compiler.backend.jvm.SerializableCodegenImpl$Companion.generateSerializableExtensions(SerializableCodegenImpl.kt:48)
	at org.jetbrains.kotlinx.serialization.compiler.extensions.SerializationCodegenExtension.generateClassSyntheticParts(SerializationCodegenExtension.kt:29)
	at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generateSyntheticPartsAfterBody(ImplementationBodyCodegen.java:440)
	at org.jetbrains.kotlin.codegen.MemberCodegen.generate(MemberCodegen.java:132)
	at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:302)
	at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:286)
	at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:312)
	at org.jetbrains.kotlin.codegen.ClassBodyCodegen.generateDeclaration(ClassBodyCodegen.java:176)
	at org.jetbrains.kotlin.codegen.ClassBodyCodegen.generateBody(ClassBodyCodegen.java:80)
	at org.jetbrains.kotlin.codegen.MemberCodegen.generate(MemberCodegen.java:129)
	at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:302)
	at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:286)
	at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generateClassesAndObjectsInFile(PackageCodegenImpl.java:119)
	at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generateFile(PackageCodegenImpl.java:138)
	at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generate(PackageCodegenImpl.java:70)
	at org.jetbrains.kotlin.codegen.DefaultCodegenFactory.generatePackage(CodegenFactory.kt:88)
	at org.jetbrains.kotlin.codegen.DefaultCodegenFactory.generateModule(CodegenFactory.kt:67)
	at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:35)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.kt:647)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:210)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli$default(KotlinToJVMBytecodeCompiler.kt:162)
	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:371)
	at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:105)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:249)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.access$compileIncrementally(IncrementalCompilerRunner.kt:38)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner$compile$2.invoke(IncrementalCompilerRunner.kt:80)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:92)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execIncrementalCompiler(CompileServiceImpl.kt:602)
	at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execIncrementalCompiler(CompileServiceImpl.kt:93)
	at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1644)
	at jdk.internal.reflect.GeneratedMethodAccessor98.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
	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:832)
Caused by: java.lang.UnsupportedOperationException: Don't know how to generate outer expression: Class: class WordCardStore
	at org.jetbrains.kotlin.codegen.context.CodegenContext.getOuterExpression(CodegenContext.java:222)
	at org.jetbrains.kotlin.codegen.context.CodegenContext.lookupInContext(CodegenContext.java:563)
	at org.jetbrains.kotlin.codegen.context.MethodContext.lookupInContext(MethodContext.java:83)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.findCapturedValue(ExpressionCodegen.java:2115)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.findLocalOrCapturedValue(ExpressionCodegen.java:2106)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.generateNonIntrinsicSimpleNameExpression(ExpressionCodegen.java:1986)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.visitSimpleNameExpression(ExpressionCodegen.java:1913)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.visitSimpleNameExpression(ExpressionCodegen.java:114)
	at org.jetbrains.kotlin.psi.KtNameReferenceExpression.accept(KtNameReferenceExpression.kt:59)
	at org.jetbrains.kotlin.codegen.ExpressionCodegen.genQualified(ExpressionCodegen.java:311)
	... 70 more
btw. I figured out what caused this error:
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@Serializable
class A(
	val foo: String,
	val bar: String = foo
)
v
Which part? That you have an override where nothing is overridden?
t
Ah, I put override by mistake. The error was caused by @Serlializable class having parameter with default value referring other parameter, I believe.
v
Anyway you should imho report it to Jetbrains. No matter what you do, you should never get an "Internal error" but at most some meaningful "don't do this and that" error.
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