Compiler crush on extending inner class

1

 

package inner


open class A {

  inner open class Child {


  }

}


class ExtA : A(){

  inner class ExtChild : A.Child(){


  }

}


Output:

Information:Kotlin: Kotlin JPS plugin version 0.12.613.Idea141.7
Information:Kotlin: Using kotlin-home = C:Usersadmin.IntelliJIdea14configpluginsKotlinkotlinc
Information:Kotlin: Kotlin Compiler version 0.12.613
Information:29.06.2015 6:27 - Compilation completed with 2 errors and 0 warnings in 2s 67ms
Error:Kotlin: [Internal Error] java.lang.RuntimeException: Error generating constructors of class ExtChild with kind IMPLEMENTATION
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generateSyntheticParts(ImplementationBodyCodegen.java:357)
     at org.jetbrains.kotlin.codegen.MemberCodegen.generate(MemberCodegen.java:111)
     at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:201)
     at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:218)
     at org.jetbrains.kotlin.codegen.ClassBodyCodegen.generateDeclaration(ClassBodyCodegen.java:100)
     at org.jetbrains.kotlin.codegen.ClassBodyCodegen.generateBody(ClassBodyCodegen.java:61)
     at org.jetbrains.kotlin.codegen.MemberCodegen.generate(MemberCodegen.java:109)
     at org.jetbrains.kotlin.codegen.MemberCodegen.genClassOrObject(MemberCodegen.java:201)
     at org.jetbrains.kotlin.codegen.PackageCodegen.generateClassOrObject(PackageCodegen.java:398)
     at org.jetbrains.kotlin.codegen.PackageCodegen.generate(PackageCodegen.java:308)
     at org.jetbrains.kotlin.codegen.PackageCodegen.generate(PackageCodegen.java:214)
     at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.generatePackage(KotlinCodegenFacade.java:80)
     at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:67)
     at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.java:384)
     at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules(KotlinToJVMBytecodeCompiler.java:145)
     at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.java:178)
     at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.java:53)
     at org.jetbrains.kotlin.cli.common.CLICompiler.exec(CLICompiler.java:148)
     at org.jetbrains.kotlin.cli.common.CLICompiler.exec(CLICompiler.java:128)
     at org.jetbrains.kotlin.cli.common.CLICompiler.execAndOutputXml(CLICompiler.java:58)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:497)
     at org.jetbrains.kotlin.compilerRunner.CompilerRunnerUtil.invokeExecMethod(CompilerRunnerUtil.java:92)
     at org.jetbrains.kotlin.compilerRunner.KotlinCompilerRunner.execCompiler(KotlinCompilerRunner.java:119)
     at org.jetbrains.kotlin.compilerRunner.KotlinCompilerRunner.runCompiler(KotlinCompilerRunner.java:94)
     at org.jetbrains.kotlin.compilerRunner.KotlinCompilerRunner.runK2JvmCompiler(KotlinCompilerRunner.java:63)
     at org.jetbrains.kotlin.jps.build.KotlinBuilder.compileToJvm(KotlinBuilder.kt:466)
     at org.jetbrains.kotlin.jps.build.KotlinBuilder.doCompileModuleChunk(KotlinBuilder.kt:233)
     at org.jetbrains.kotlin.jps.build.KotlinBuilder.build(KotlinBuilder.kt:134)
     at org.jetbrains.jps.incremental.IncProjectBuilder.runModuleLevelBuilders(IncProjectBuilder.java:1196)
     at org.jetbrains.jps.incremental.IncProjectBuilder.runBuildersForChunk(IncProjectBuilder.java:877)
     at org.jetbrains.jps.incremental.IncProjectBuilder.buildTargetsChunk(IncProjectBuilder.java:945)
     at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunkIfAffected(IncProjectBuilder.java:840)
     at org.jetbrains.jps.incremental.IncProjectBuilder.buildChunks(IncProjectBuilder.java:663)
     at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:370)
     at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:191)
     at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:137)
     at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:293)
     at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:124)
     at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler$1.run(BuildMain.java:242)
     at org.jetbrains.jps.service.impl.SharedThreadPoolImpl$1.run(SharedThreadPoolImpl.java:41)
     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
     at java.util.concurrent.FutureTask.run(FutureTask.java:266)
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
     at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedOperationException: Don't know how to generate outer expression for lazy class ExtA
     at org.jetbrains.kotlin.codegen.context.CodegenContext.getOuterExpression(CodegenContext.java:124)
     at org.jetbrains.kotlin.codegen.context.CodegenContext.getOuterExpression(CodegenContext.java:118)
     at org.jetbrains.kotlin.codegen.ExpressionCodegen.generateThisOrOuter(ExpressionCodegen.java:2577)
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generateSuperCallImplicitArguments(ImplementationBodyCodegen.java:1530)
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generateDelegatorToConstructorCall(ImplementationBodyCodegen.java:1480)
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generatePrimaryConstructorImpl(ImplementationBodyCodegen.java:1100)
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.access$400(ImplementationBodyCodegen.java:96)
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen$4.doGenerateBody(ImplementationBodyCodegen.java:1053)
     at org.jetbrains.kotlin.codegen.FunctionGenerationStrategy$CodegenBased.generateBody(FunctionGenerationStrategy.java:72)
     at org.jetbrains.kotlin.codegen.FunctionCodegen.generateMethodBody(FunctionCodegen.java:363)
     at org.jetbrains.kotlin.codegen.FunctionCodegen.generateMethod(FunctionCodegen.java:202)
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generatePrimaryConstructor(ImplementationBodyCodegen.java:1049)
     at org.jetbrains.kotlin.codegen.ImplementationBodyCodegen.generateSyntheticParts(ImplementationBodyCodegen.java:345)
     ... 47 more
Error:Kotlin: Compiler terminated with internal error

Sometimes compiler dont crush and just tells:

Error:(10, 33) Kotlin: Unresolved reference: Child
2

This is a known problem, see KT-7421.

The only workarounds we know of are either to make Child non-inner, or to inherit from it in Java (see the linked issue for details).