CNFE when sending launchable back to provider.

gistfile1.txt

org.gradle.tooling.GradleConnectionException: Could not execute build using Gradle installation '/home/radim/src/github.com/gradle/gradle/build/integ test'.
	at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:55)
	at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:57)
	at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
	at org.gradle.tooling.internal.consumer.BlockingResultHandler.getResult(BlockingResultHandler.java:46)
	at org.gradle.tooling.internal.consumer.DefaultBuildLauncher.run(DefaultBuildLauncher.java:114)
	at org.gradle.integtests.tooling.fixture.ToolingApiSpecification.withBuild_closure3(ToolingApiSpecification.groovy:99)
	at org.gradle.integtests.tooling.fixture.ToolingApi.withConnectionRaw(ToolingApi.groovy:87)
	at org.gradle.integtests.tooling.fixture.ToolingApi.withConnection(ToolingApi.groovy:62)
	at org.gradle.integtests.tooling.fixture.ToolingApi.withConnection(ToolingApi.groovy:58)
	at org.gradle.integtests.tooling.fixture.ToolingApiSpecification.withConnection(ToolingApiSpecification.groovy:79)
	at org.gradle.integtests.tooling.fixture.ToolingApiSpecification.withBuild(ToolingApiSpecification.groovy:95)
	at org.gradle.integtests.tooling.r112.BuildInvocationsCrossVersionSpec.build tasks from BuildInvocations model as Launchable(BuildInvocationsCrossVersionSpec.groovy:211)
Caused by: java.lang.RuntimeException: Unable to receive command from connection: 'socket connection at /0:0:0:0:0:0:0:1:39010 with /0:0:0:0:0:0:0:1:42492'
	at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.receiveCommand(DefaultIncomingConnectionHandler.java:146)
	at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.receiveAndHandleCommand(DefaultIncomingConnectionHandler.java:126)
	at org.gradle.launcher.daemon.server.DefaultIncomingConnectionHandler$ConnectionWorker.run(DefaultIncomingConnectionHandler.java:116)
	at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: org.gradle.messaging.remote.internal.MessageIOException: Could not read message from '/0:0:0:0:0:0:0:1:42492'.
	at org.gradle.messaging.remote.internal.inet.SocketConnection.receive(SocketConnection.java:88)
	at org.gradle.launcher.daemon.server.SynchronizedDispatchConnection.receive(SynchronizedDispatchConnection.java:57)
	at org.gradle.launcher.daemon.server.DefaultDaemonConnection$1.run(DefaultDaemonConnection.java:61)
	... 4 more
Caused by: java.lang.ClassNotFoundException: org.gradle.plugins.ide.internal.tooling.gradle.LaunchableGradleTask
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at java.lang.Class.forName(Class.java:270)
	at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:625)
	at org.gradle.internal.io.ClassLoaderObjectInputStream.resolveClass(ClassLoaderObjectInputStream.java:40)
	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1612)
	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
	at java.util.ArrayList.readObject(ArrayList.java:771)
	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1017)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1893)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1990)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1915)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1798)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
	at org.gradle.messaging.remote.internal.Message.receive(Message.java:57)
	at org.gradle.messaging.remote.internal.DefaultMessageSerializer$MessageReader.read(DefaultMessageSerializer.java:50)
	at org.gradle.messaging.remote.internal.inet.SocketConnection.receive(SocketConnection.java:83)
	... 6 more