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Very frustrating.. Small tweak in data classes and...
# serialization
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Very frustrating.. Small tweak in data classes and all of a sudden kotlinx.serialization causes compiler errors like this. Is there any known pitfalls to avoid getting problems like this?
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org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: Couldn't transform method node:
write$Self (Ldev/kantis/Square;Lkotlinx/serialization/encoding/CompositeEncoder;Lkotlinx/serialization/descriptors/SerialDescriptor;Lkotlinx/serialization/KSerializer;Lkotlinx/serialization/KSerializer;)V:
  @Lkotlin/jvm/JvmStatic;()
    // annotable parameter count: 5 (visible)
    // annotable parameter count: 5 (invisible)
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 0
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 1
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 2
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 3
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 4

[Full error in thread]
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org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: Couldn't transform method node:
write$Self (Ldev/kantis/Square;Lkotlinx/serialization/encoding/CompositeEncoder;Lkotlinx/serialization/descriptors/SerialDescriptor;Lkotlinx/serialization/KSerializer;Lkotlinx/serialization/KSerializer;)V:
  @Lkotlin/jvm/JvmStatic;()
    // annotable parameter count: 5 (visible)
    // annotable parameter count: 5 (invisible)
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 0
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 1
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 2
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 3
    @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 4
   L0
    ALOAD 0
    LDC "self"
    INVOKESTATIC kotlin/jvm/internal/Intrinsics.checkNotNullParameter (Ljava/lang/Object;Ljava/lang/String;)V
    ALOAD 1
    LDC "output"
    INVOKESTATIC kotlin/jvm/internal/Intrinsics.checkNotNullParameter (Ljava/lang/Object;Ljava/lang/String;)V
    ALOAD 2
    LDC "serialDesc"
    INVOKESTATIC kotlin/jvm/internal/Intrinsics.checkNotNullParameter (Ljava/lang/Object;Ljava/lang/String;)V
    ALOAD 3
    LDC "typeSerial0"
    INVOKESTATIC kotlin/jvm/internal/Intrinsics.checkNotNullParameter (Ljava/lang/Object;Ljava/lang/String;)V
    ALOAD 4
    LDC "typeSerial1"
    INVOKESTATIC kotlin/jvm/internal/Intrinsics.checkNotNullParameter (Ljava/lang/Object;Ljava/lang/String;)V
   L1
    LINENUMBER 7 L1
    ALOAD 0
    CHECKCAST dev/kantis/Shape
    ALOAD 1
    ALOAD 2
    ALOAD 3
    ALOAD 4
    INVOKEVIRTUAL dev/kantis/Shape.write$Self (Ldev/kantis/Shape;Lkotlinx/serialization/encoding/CompositeEncoder;Lkotlinx/serialization/descriptors/SerialDescriptor;Lkotlinx/serialization/KSerializer;Lkotlinx/serialization/KSerializer;)V
    RETURN
   L2
    LOCALVARIABLE self Ldev/kantis/Square; L0 L2 0
    LOCALVARIABLE output Lkotlinx/serialization/encoding/CompositeEncoder; L0 L2 1
    LOCALVARIABLE serialDesc Lkotlinx/serialization/descriptors/SerialDescriptor; L0 L2 2
    LOCALVARIABLE typeSerial0 Lkotlinx/serialization/KSerializer; L0 L2 3
    LOCALVARIABLE typeSerial1 Lkotlinx/serialization/KSerializer; L0 L2 4
    MAXSTACK = 5
    MAXLOCALS = 5

File is unknown
The root cause java.lang.AssertionError was thrown at: org.jetbrains.kotlin.codegen.optimization.MethodVerifier.transform(MethodVerifier.kt:28)
	at org.jetbrains.kotlin.codegen.TransformationMethodVisitor.visitEnd(TransformationMethodVisitor.kt:92)
	at org.jetbrains.org.objectweb.asm.MethodVisitor.visitEnd(MethodVisitor.java:782)
	at org.jetbrains.org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:772)
	at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generateMethod(ClassCodegen.kt:405)
	at org.jetbrains.kotlin.backend.jvm.codegen.ClassCodegen.generate(ClassCodegen.kt:133)
	at org.jetbrains.kotlin.backend.jvm.JvmLowerKt$codegenPhase$1$1.lower(JvmLower.kt:304)
	at org.jetbrains.kotlin.backend.common.phaser.FileLoweringPhaseAdapter.invoke(PhaseBuilders.kt:120)
	at org.jetbrains.kotlin.backend.common.phaser.FileLoweringPhaseAdapter.invoke(PhaseBuilders.kt:116)
	at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
	at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invokeSequential(performByIrFile.kt:65)
	at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:55)
	at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(performByIrFile.kt:41)
	at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
	at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:29)
	at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
	at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:29)
	at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:96)
	at org.jetbrains.kotlin.backend.common.phaser.CompilerPhaseKt.invokeToplevel(CompilerPhase.kt:43)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.doGenerateFilesInternal(JvmIrCodegenFactory.kt:191)
	at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.generateModule(JvmIrCodegenFactory.kt:60)
	at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:35)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.kt:618)
	at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$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:90)
	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:303)
	at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:121)
	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.GeneratedMethodAccessor104.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.AssertionError: AFTER mandatory stack transformations: incorrect bytecode
	at org.jetbrains.kotlin.codegen.optimization.MethodVerifier.transform(MethodVerifier.kt:28)
	at org.jetbrains.kotlin.codegen.optimization.transformer.CompositeMethodTransformer.transform(CompositeMethodTransformer.kt:25)
	at org.jetbrains.kotlin.codegen.optimization.OptimizationMethodVisitor.performTransformations(OptimizationMethodVisitor.kt:62)
	at org.jetbrains.kotlin.codegen.TransformationMethodVisitor.visitEnd(TransformationMethodVisitor.kt:70)
	... 52 more
Caused by: org.jetbrains.org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 24: Cannot pop operand off an empty stack.
	at org.jetbrains.org.objectweb.asm.tree.analysis.Analyzer.analyze(Analyzer.java:295)
	at org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer.runAnalyzer(MethodTransformer.java:32)
	at org.jetbrains.kotlin.codegen.optimization.transformer.MethodTransformer.analyze(MethodTransformer.java:45)
	at org.jetbrains.kotlin.codegen.optimization.MethodVerifier.transform(MethodVerifier.kt:26)
	... 55 more
Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off an empty stack.
	at org.jetbrains.org.objectweb.asm.tree.analysis.Frame.pop(Frame.java:228)
	at org.jetbrains.org.objectweb.asm.tree.analysis.Frame.executeInvokeInsn(Frame.java:643)
	at org.jetbrains.org.objectweb.asm.tree.analysis.Frame.execute(Frame.java:573)
	at org.jetbrains.org.objectweb.asm.tree.analysis.Analyzer.analyze(Analyzer.java:187)
	... 58 more
Happens with both 1.2.2 and 1.3.0-RC
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