Kapt gradle task Ausnahme: class cast exception

Question

Ausführung fehlgeschlagen für Task ': app: kaptSomethingDebugKotlin'.

Ich habe einige meiner Klasse refaktoriert und ich habe einige Kotlin Klassen und Klassen mit bloßen Funktionen hinzugefügt.

Wenn ich versuche, das Projekt zu kompilieren, passieren diese komischen Dinge und keiner der Ausnahme Stack-Trace hilft mir.

es dieses Problem scheint, ist aufgrund Kotlin java Kombination

Unable to receive command from client socket connection from /127.0.0.1:5573 to /127.0.0.1:13020. Discarding connection. 

org.gradle.internal.remote.internal.MessageIOException: Could not read message from '/127.0.0.1:13020'. 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnectin.java:92) 
     at org.gradle.launcher.daemon.server.SynchronizedDispatchConnection.receive(SynchronizedDispatchConnection.java:68) 
     at org.gradle.launcher.daemon.server.DefaultDaemonConnection$1.run(DefaultDaemonConnection.java:63) 
     at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) 
     at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) 
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
     at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) 
     at java.lang.Thread.run(Thread.java:748) 

Caused by: java.lang.IllegalArgumentException: Unexpected type tag 67 found. 
     at org.gradle.internal.serialize.DefaultSerializerRegistry$TaggedTypeSerializer.read(DefaultSerializerRegistry.java:142) 
     at org.gradle.internal.serialize.Serializers$StatefulSerializerAdapter$1.read(Serializers.java:36) 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:79) 
     ... 8 more 

Unable to receive command from client socket connection from /127.0.0.1:5573 to /127.0 
.0.1:13025. Discarding connection.org.gradle.internal.remote.internal.MessageIOException: Could not read message from '/127.0.0.1:13025'. 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:92) 
     at org.gradle.launcher.daemon.server.SynchronizedDispatchConnection.receive(SynchronizedDispatchConnection.java:68) 
     at org.gradle.launcher.daemon.server.DefaultDaemonConnection$1.run(DefaultDaemonConnection.java:63) 
     at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) 
     at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) 
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
     at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) 
     at java.lang.Thread.run(Thread.java:748) 

Caused by: java.lang.IllegalArgumentException: Unexpected type tag 67 found. 
     at org.gradle.internal.serialize.DefaultSerializerRegistry$TaggedTypeSerializer.read(DefaultSerializerRegistry.java:142) 
     at org.gradle.internal.serialize.Serializers$StatefulSerializerAdapter$1.read(Serializers.java:36) 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:79) 
     ... 8 more 

Unable to receive command from client socket connection from /127.0.0.1:5573 to /127.0.0.1:13033. Discarding connection. 
org.gradle.internal.remote.internal.MessageIOException: Could not read message from '/127.0.0.1:13033'. 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:92) 
     at org.gradle.launcher.daemon.server.SynchronizedDispatchConnection.receive(SynchronizedDispatchConnection.java:68) 
     at org.gradle.launcher.daemon.server.DefaultDaemonConnection$1.run(DefaultDaemonConnection.java:63) 
     at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) 
     at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) 
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
     at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) 
     at java.lang.Thread.run(Thread.java:748) 

Caused by: java.lang.IllegalArgumentException: Unexpected type tag 67 found. 
     at org.gradle.internal.serialize.DefaultSerializerRegistry$TaggedTypeSerializer.read(DefaultSerializerRegistry.java:142) 
     at org.gradle.internal.serialize.Serializers$StatefulSerializerAdapter$1.read(Serializers.java:36) 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:79) 
     ... 8 more 
Unable to receive command from client socket connection from /127.0.0.1:5573 to /127.0.0.1:13040. Discarding connection. 
org.gradle.internal.remote.internal.MessageIOException: Could not read message from '/127.0.0.1:13040'. 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:92) 
     at org.gradle.launcher.daemon.server.SynchronizedDispatchConnection.receive(SynchronizedDispatchConnection.java:68) 
     at org.gradle.launcher.daemon.server.DefaultDaemonConnection$1.run(DefaultDaemonConnection.java:63) 
     at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) 
     at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) 
     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
     at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) 
     at java.lang.Thread.run(Thread.java:748) 

Caused by: java.lang.IllegalArgumentException: Unexpected type tag 67 found. 
     at org.gradle.internal.serialize.DefaultSerializerRegistry$TaggedTypeSerializer.read(DefaultSerializerRegistry.java:142) 
     at org.gradle.internal.serialize.Serializers$StatefulSerializerAdapter$1.read(Serializers.java:36) 
     at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:79) 
     ... 8 more 



e: java.lang.IllegalStateException: failed to analyze: java.lang.ClassCastException 
     at org.jetbrains.kotlin.analyzer.AnalysisResult.throwIfError(AnalysisResult.kt:57) 
     at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules(KotlinToJVMBytecodeCompiler.kt:137) 
     at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:158) 
     at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:61) 
     at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:107) 
     at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:51) 
     at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:92) 
     at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$1$2.invoke(CompileServiceImpl.kt:386) 
     at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$1$2.invoke(CompileServiceImpl.kt:96) 
     at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:892) 
     at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:96) 
     at org.jetbrains.kotlin.daemon.common.DummyProfiler.withMeasure(PerfUtils.kt:137) 
     at org.jetbrains.kotlin.daemon.CompileServiceImpl.checkedCompile(CompileServiceImpl.kt:919) 
     at org.jetbrains.kotlin.daemon.CompileServiceImpl.doCompile(CompileServiceImpl.kt:891) 
     at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:385) 
     at sun.reflect.GeneratedMethodAccessor87.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$1.run(Transport.java:197) 
     at java.security.AccessController.doPrivileged(Native Method) 
     at sun.rmi.transport.Transport.serviceCall(Transport.java:196) 
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568) 
     at sun.rmi.transport.tcp.TCPTransport$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:1149) 
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
     at java.lang.Thread.run(Thread.java:748) 
Caused by: java.lang.ClassCastException 

Answer 1

nach einer Woche von Versuch und Scheitern und Kommentierung und Auskommentierung Zeile für Zeile, ich erkennen, dass es ein Fehler in Kotlin zu Java-Compiler und jeder war Zeit, die ich schrieb eine Kotlin-Funktion, die keine geschweiften Klammern hatte diese Ausnahme wurde geworfen

der Grund war, dass ich Funktion Rückgabetyp nicht angegeben hatte und meine Funktion hatte nur eine Aussage, die als der Körper der Funktion mit einem Gleichheitszeichen angehängt wurde. Auf diese Weise sind wir auf Kotlin angewiesen, um den retuen Typ von Funktion durch den Rückgabetyp o zu identifizieren f diese einzige Aussage.

, wenn Sie setzen, dass eine Zeile Anweisung in geschweiften Klammern und geben Sie die Rückkehr explizit eingeben, geht die Ausnahme entfernt