IdSignature clash during compilation Composable get() for JS target

[igordmn]

Compose 1.4.1, JS target

1. open the example example/falling-balls
2. write this in commonMain/kotlin/Actual.kt:

internal expect val test: Boolean
  @Composable
  get

3. write this in jsMain/kotlin/Actual.jsMain.kt:

internal actual val test: Boolean
    @Composable
    get() = false

4. Run ./gradlew compileKotlinJs
5. See the crash:

e: java.lang.IllegalStateException: IdSignature clash: /$get-test$$composable|9167011006941939362[0]; Existed declaration FUN DEFAULT_PROPERTY_ACCESSOR name:$get-test
$$composable visibility:internal modality:FINAL <> ($composer:androidx.compose.runtime.Composer?, $changed:kotlin.Int) returnType:kotlin.Boolean clashed with new FUN name:$get-test$$composable visibility:internal modality:FINAL <> ($composer:androidx.compose.runtime.Composer?, $changed:kotlin.Int) returnType:kotlin.Boolean        
        at org.jetbrains.kotlin.ir.backend.js.lower.serialization.ir.JsUniqIdClashTracker.commit(JsDeclarationTable.kt:27)
        at org.jetbrains.kotlin.backend.common.serialization.GlobalDeclarationTable.computeSignatureByDeclaration(DeclarationTable.kt:48)
        at org.jetbrains.kotlin.backend.common.serialization.DeclarationTable.computeSignatureByDeclaration(DeclarationTable.kt:83)
        at org.jetbrains.kotlin.backend.common.serialization.DeclarationTable.signatureByDeclaration(DeclarationTable.kt:92)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.protoIdSignature(IrFileSerializer.kt:290)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.serializeIrSymbol(IrFileSerializer.kt:353)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.serializeIrDeclarationBase(IrFileSerializer.kt:1096)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.serializeIrFunctionBase(IrFileSerializer.kt:1135)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.serializeIrFunction(IrFileSerializer.kt:1165)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.serializeDeclaration(IrFileSerializer.kt:1322)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.serializeIrFileImpl(IrFileSerializer.kt:1431)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.access$serializeIrFileImpl(IrFileSerializer.kt:115)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer$serializeIrFile$1.invoke(IrFileSerializer.kt:1411)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer$serializeIrFile$1.invoke(IrFileSerializer.kt:1410)
        at org.jetbrains.kotlin.backend.common.serialization.signature.PublicIdSignatureComputer.inFile(IdSignatureSerializer.kt:45)
        at org.jetbrains.kotlin.backend.common.serialization.signature.IdSignatureSerializer.inFile(IdSignatureSerializer.kt:229)
        at org.jetbrains.kotlin.backend.common.serialization.DeclarationTable.inFile(DeclarationTable.kt:62)
        at org.jetbrains.kotlin.backend.common.serialization.IrFileSerializer.serializeIrFile(IrFileSerializer.kt:1410)
        at org.jetbrains.kotlin.backend.common.serialization.IrModuleSerializer.serializeIrFile(IrModuleSerializer.kt:28)
        at org.jetbrains.kotlin.backend.common.serialization.IrModuleSerializer.serializedIrModule(IrModuleSerializer.kt:35)
        at org.jetbrains.kotlin.ir.backend.js.KlibKt.serializeModuleIntoKlib(klib.kt:621)
        at org.jetbrains.kotlin.ir.backend.js.KlibKt.generateKLib(klib.kt:134)
        at org.jetbrains.kotlin.ir.backend.js.KlibKt.generateKLib$default(klib.kt:118)
        at org.jetbrains.kotlin.cli.js.K2JsIrCompiler.processSourceModule(K2JsIrCompiler.kt:471)
        at org.jetbrains.kotlin.cli.js.K2JsIrCompiler.doExecute(K2JsIrCompiler.kt:295)
        at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecute(K2JSCompiler.java:180)
        at org.jetbrains.kotlin.cli.js.K2JSCompiler.doExecute(K2JSCompiler.java:72)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:100)
        at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:46)
        at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:101)
        at org.jetbrains.kotlin.incremental.IncrementalJsCompilerRunner.runCompiler(IncrementalJsCompilerRunner.kt:213)
        at org.jetbrains.kotlin.incremental.IncrementalJsCompilerRunner.runCompiler(IncrementalJsCompilerRunner.kt:84)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.doCompile(IncrementalCompilerRunner.kt:486)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileImpl(IncrementalCompilerRunner.kt:409)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.tryCompileIncrementally$lambda$2$compile(IncrementalCompilerRunner.kt:210)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.tryCompileIncrementally(IncrementalCompilerRunner.kt:241)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:103)
        at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile$default(IncrementalCompilerRunner.kt:94)
        at org.jetbrains.kotlin.daemon.CompileServiceImplBase.execJsIncrementalCompiler(CompileServiceImpl.kt:567)
        at org.jetbrains.kotlin.daemon.CompileServiceImplBase.access$execJsIncrementalCompiler(CompileServiceImpl.kt:101)
        at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:1678)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at java.base/java.lang.reflect.Method.invoke(Method.java:578)
        at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:360)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
        at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:712)
        at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:598)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:844)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:721)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
        at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:720)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
        at java.base/java.lang.Thread.run(Thread.java:1589)

Native, JVM targets compile well.

[eymar]

Closing this. IdSignature clashes are generated by compose and we simply disable such check - https://github.com/JetBrains/compose-multiplatform/blob/master/gradle-plugins/compose/src/main/kotlin/org/jetbrains/compose/ComposePlugin.kt#L92

Other backends simply don't check for signature clashes.

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.