Kotlin은 이미 수퍼 클래스에 존재하는 인터페이스에서 메소드를 구현합니다

이 인터페이스가 있다고 가정 해 봅시다 :

interface Things {
  fun size(): Int
}

그리고 List 를 서브 클래스로 만들고 싶습니다  이 인터페이스를 구현하십시오.

class Cars : ArrayList<String>, Things {}

컴파일 오류가 발생했습니다 :

Inherited platform declarations clash: The following declarations have the same JVM signature (size()I): fun (): Int defined in Things fun size(): Int defined in Things

size 를 변경하여 컴파일 오류를 해결할 수 있습니다.   var 와 계약  암시 적 getter :

interface Things {
    var size: Int
}

그러나 런타임 오류처럼 보이는 길고 복잡한 오류가 발생합니다 ( IllegalStateException ) 그러나 Kotlin이 컴파일 할 때 발생하는 것 같습니다 : shrug :

이러한 이유가 무엇인지 알고 있습니다.- ArrayList  이미 int size() 가 있습니다  Kotlin은 이제 동일한 서명을 추가하려고 시도하지만 내가 옳더라도 (10 % 확률?) 별 도움이되지 않습니다.

또한 get 를 가질 수 있다고 언급하겠습니다.   Things 의 일부로  인터페이스는 목록에 의해 만족됩니다. 나는 operator 를 추측 해요  연산자 슬라이드하기에 충분할 정도로 다르게 설정 했습니까?

어쨌든 IDE 오류는 없지만 빌드 할 때 다음을 얻습니다.

java.lang.IllegalStateException: Backend Internal error: Exception during code generation
Cause: Concrete fake override public open fun <set-size>(<set-?>: kotlin.Int): kotlin.Unit defined in org.blah.Stuff[[email protected]] should have exactly one concrete super-declaration: []
File being compiled at position: file:///blah/Stuff.kt
The root cause was thrown at: bridges.kt:122
    at org.jetbrains.kotlin.codegen.CompilationErrorHandler.lambda$static$0(CompilationErrorHandler.java:24)
    at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generate(PackageCodegenImpl.java:76)
    at org.jetbrains.kotlin.codegen.DefaultCodegenFactory.generatePackage(CodegenFactory.kt:96)
    at org.jetbrains.kotlin.codegen.DefaultCodegenFactory.generateModule(CodegenFactory.kt:67)
    at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.doGenerateFiles(KotlinCodegenFacade.java:47)
    at org.jetbrains.kotlin.codegen.KotlinCodegenFacade.compileCorrectFiles(KotlinCodegenFacade.java:39)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.generate(KotlinToJVMBytecodeCompiler.kt:476)
    at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules$cli(KotlinToJVMBytecodeCompiler.kt:164)
    at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:166)
    at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:56)
    at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:84)
    at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:42)
    at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:104)
    at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:349)
    at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:105)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:237)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.access$compileIncrementally(IncrementalCompilerRunner.kt:37)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner$compile$2.invoke(IncrementalCompilerRunner.kt:79)
    at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:91)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl.execIncrementalCompiler(CompileServiceImpl.kt:579)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl.access$execIncrementalCompiler(CompileServiceImpl.kt:102)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:455)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:102)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:1005)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:102)
    at org.jetbrains.kotlin.daemon.common.DummyProfiler.withMeasure(PerfUtils.kt:138)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl.checkedCompile(CompileServiceImpl.kt:1047)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl.doCompile(CompileServiceImpl.kt:1004)
    at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:454)
    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:498)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:346)
    at sun.rmi.transport.Transport$1.run(Transport.java:200)
    at sun.rmi.transport.Transport$1.run(Transport.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
    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.IllegalStateException: Concrete fake override public open fun <set-size>(<set-?>: kotlin.Int): kotlin.Unit defined in org.blah.Stuff[[email protected]] should have exactly one concrete super-declaration: []
    at org.jetbrains.kotlin.backend.common.bridges.BridgesKt.findConcreteSuperDeclaration(bridges.kt:122)
    at org.jetbrains.kotlin.backend.common.bridges.BridgesKt.generateBridges(bridges.kt:59)
    at org.jetbrains.kotlin.codegen.JvmBridgesImplKt.generateBridgesForFunctionDescriptorForJvm(JvmBridgesImpl.kt:92)
    at org.jetbrains.kotlin.codegen.FunctionCodegen.generateBridges(FunctionCodegen.java:1041)
    at org.jetbrains.kotlin.codegen.ClassBodyCodegen.generateBridges(ClassBodyCodegen.java:138)
    at org.jetbrains.kotlin.codegen.ClassBodyCodegen.generateBody(ClassBodyCodegen.java:116)
    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:118)
    at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generateFile(PackageCodegenImpl.java:137)
    at org.jetbrains.kotlin.codegen.PackageCodegenImpl.generate(PackageCodegenImpl.java:68)
    ... 44 more

> Task :app:buildInfoGeneratorDebug

아무것도 없습니다. 나는 대부분의 인생을 자바에서 보냈고 코 틀린 파티에 늦었다. 모든 대안, 대안 ... 또는 이것이 알려진 것입니까?

TYIA