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I’ve also just tried the IR backend on our code ba...
# jvm-ir-backend-feedback
e
I’ve also just tried the IR backend on our code base (with 1.4.30) and ran into a different IndexOutOfBoundsException that doesn’t seem related to parcelize like the one above 
IndexOutOfBoundsException: chars sequence.length:3389, start:1313, end:4337
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org.jetbrains.kotlin.backend.common.BackendException: Backend Internal error: Exception during IR lowering

The root cause java.lang.IndexOutOfBoundsException was thrown at: org.jetbrains.kotlin.com.intellij.util.text.CharSequenceSubSequence.<init>(CharSequenceSubSequence.java:20)
        at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException(CodegenUtil.kt:239)
        at org.jetbrains.kotlin.backend.common.CodegenUtil.reportBackendException$default(CodegenUtil.kt:235)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(PhaseBuilders.kt:124)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(PhaseBuilders.kt:112)
        at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:94)
        at org.jetbrains.kotlin.backend.common.phaser.CompositePhase.invoke(PhaseBuilders.kt:30)
        at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:94)
        at org.jetbrains.kotlin.backend.common.phaser.CompilerPhaseKt.invokeToplevel(CompilerPhase.kt:41)
        at org.jetbrains.kotlin.backend.jvm.JvmLower.lower(JvmLower.kt:407)
        at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.doGenerateFilesInternal$backend_jvm(JvmIrCodegenFactory.kt:147)
        at org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory.generateModule(JvmIrCodegenFactory.kt:120)
        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 sun.reflect.GeneratedMethodAccessor102.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
        at sun.rmi.transport.Transport$1.run(Transport.java:200)
        at sun.rmi.transport.Transport$1.run(Transport.java:197)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IndexOutOfBoundsException: chars sequence.length:3389, start:1313, end:4337
        at org.jetbrains.kotlin.com.intellij.util.text.CharSequenceSubSequence.<init>(CharSequenceSubSequence.java:20)
        at org.jetbrains.kotlin.com.intellij.util.text.ImmutableText.subSequence(ImmutableText.java:194)
        at org.jetbrains.kotlin.backend.jvm.lower.TypeOperatorLowering.visitTypeOperator(TypeOperatorLowering.kt:155)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitTypeOperator(IrElementTransformerVoid.kt:245)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitTypeOperator(IrElementTransformerVoid.kt:24)
        at org.jetbrains.kotlin.ir.expressions.impl.IrTypeOperatorCallImpl.accept(IrTypeOperatorCallImpl.kt:40)
        at org.jetbrains.kotlin.ir.expressions.IrExpression.transform(IrExpression.kt:33)
        at org.jetbrains.kotlin.ir.expressions.IrBranch.transformChildren(IrWhen.kt:55)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitBranch(IrElementTransformerVoid.kt:251)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitBranch(IrElementTransformerVoid.kt:255)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitBranch(IrElementTransformerVoid.kt:24)
        at org.jetbrains.kotlin.ir.expressions.impl.IrBranchImpl.transform(IrWhenImpl.kt:56)
        at org.jetbrains.kotlin.ir.expressions.IrWhen.transformChildren(IrWhen.kt:37)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitExpression(IrElementTransformerVoid.kt:131)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitWhen(IrElementTransformerVoid.kt:247)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitWhen(IrElementTransformerVoid.kt:248)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitWhen(IrElementTransformerVoid.kt:24)
        at org.jetbrains.kotlin.ir.expressions.IrWhen.accept(IrWhen.kt:29)
        at org.jetbrains.kotlin.ir.expressions.IrExpression.transform(IrExpression.kt:33)
        at org.jetbrains.kotlin.ir.expressions.impl.IrReturnImpl.transformChildren(IrReturnImpl.kt:41)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitExpression(IrElementTransformerVoid.kt:131)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitReturn(IrElementTransformerVoid.kt:292)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitReturn(IrElementTransformerVoid.kt:293)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitReturn(IrElementTransformerVoid.kt:24)
        at org.jetbrains.kotlin.ir.expressions.impl.IrReturnImpl.accept(IrReturnImpl.kt:34)
        at org.jetbrains.kotlin.ir.expressions.IrExpression.transform(IrExpression.kt:33)
        at org.jetbrains.kotlin.ir.expressions.IrExpression.transform(IrExpression.kt:26)
        at org.jetbrains.kotlin.ir.expressions.IrBlockBody.transformChildren(IrBody.kt:62)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitBody(IrElementTransformerVoid.kt:108)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitBlockBody(IrElementTransformerVoid.kt:117)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitBlockBody(IrElementTransformerVoid.kt:118)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitBlockBody(IrElementTransformerVoid.kt:24)
        at org.jetbrains.kotlin.ir.expressions.IrBlockBody.accept(IrBody.kt:54)
        at org.jetbrains.kotlin.ir.expressions.IrBody.transform(IrBody.kt:27)
        at org.jetbrains.kotlin.ir.declarations.IrFunction.transformChildren(IrFunction.kt:71)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitDeclaration(IrElementTransformerVoid.kt:57)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitFunction(IrElementTransformerVoid.kt:69)
        at org.jetbrains.kotlin.backend.common.lower.IrBuildingTransformer.visitFunction(LowerUtils.kt:143)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitSimpleFunction(IrElementTransformerVoid.kt:72)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitSimpleFunction(IrElementTransformerVoid.kt:73)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitSimpleFunction(IrElementTransformerVoid.kt:24)
        at org.jetbrains.kotlin.ir.declarations.IrSimpleFunction.accept(IrSimpleFunction.kt:28)
        at org.jetbrains.kotlin.ir.IrElement$DefaultImpls.transform(IrElement.kt:32)
        at org.jetbrains.kotlin.ir.IrElementBase.transform(IrElementBase.kt:19)
        at org.jetbrains.kotlin.ir.util.TransformKt.transformInPlace(transform.kt:35)
        at org.jetbrains.kotlin.ir.declarations.IrClass.transformChildren(IrClass.kt:66)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitDeclaration(IrElementTransformerVoid.kt:57)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitClass(IrElementTransformerVoid.kt:66)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitClass(IrElementTransformerVoid.kt:67)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.visitClass(IrElementTransformerVoid.kt:24)
        at org.jetbrains.kotlin.ir.declarations.IrClass.accept(IrClass.kt:55)
        at org.jetbrains.kotlin.ir.IrElement$DefaultImpls.transform(IrElement.kt:32)
        at org.jetbrains.kotlin.ir.IrElementBase.transform(IrElementBase.kt:19)
        at org.jetbrains.kotlin.ir.declarations.impl.IrFileImpl.transformChildren(IrFileImpl.kt:71)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoidKt.transformChildrenVoid(IrElementTransformerVoid.kt:330)
        at org.jetbrains.kotlin.ir.visitors.IrElementTransformerVoid.transformChildrenVoid(IrElementTransformerVoid.kt:325)
        at org.jetbrains.kotlin.backend.jvm.lower.TypeOperatorLowering.lower(TypeOperatorLowering.kt:52)
        at org.jetbrains.kotlin.backend.common.phaser.FileLoweringPhaseAdapter.invoke(PhaseBuilders.kt:155)
        at org.jetbrains.kotlin.backend.common.phaser.FileLoweringPhaseAdapter.invoke(PhaseBuilders.kt:151)
        at org.jetbrains.kotlin.backend.common.phaser.NamedCompilerPhase.invoke(CompilerPhase.kt:94)
        at org.jetbrains.kotlin.backend.common.phaser.PerformByIrFilePhase.invoke(PhaseBuilders.kt:121)
        ... 42 more
this was after a clean, doing just a 
assembleDebug
of our project. The file it failed on is nothing special, just 70 lines and I don’t see anything unusual about it. We have a very large and complex project though so I wouldn’t know how to even begin trying to provide a sample reproduction for you
u
How were you able to determine which source file it fails on, if there's none in the exception message? I suppose you can start by reporting an issue and attaching exactly this file, it might be enough for us to deduce what the error is about, since it looks like only syntactic structure might be necessary to reproduce the error. Of course, you can remove any sensitive info, as long as the issue still reproduces. But if I'm wrong, we'll ask you to provide more info.
e
the error message did report the file name it failed on. i excluded that part
sure, I can create an issue
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