ClassNotFoundException on lambda expression inside the method

[alisevych]

Description

ClassNotFoundException is thrown on concrete execution of a method with lambda expression producing an anonymous class inside.

To Reproduce

1. Run a project in IntelliJ Idea 2022.1.4 with one of the latest plugin builds from main branch
2. Add the following code:

public class A {

    public interface Driver {
        public int getNumber(int n);
    }

    public Driver getDriver() {
        return n -> 2 * n - 1 ;
    }
}

3. Use plugin to generate tests for getDriver() method.
4. Open the generated test

Expected behavior

Tests are supposed to be generated without errors.

Actual behavior

There is an error test with concrete execution failed.

Visual proofs (screenshots, logs, images)

    ///region Errors report for getDriver

    public void testGetDriver_errors() {
        // Couldn't generate some tests. List of errors:
        // 
        // 1 occurrences of:
        // Default concrete execution failed

    }
    ///endregion

Concrete execution log - expand for details

16:44:01.974 ERROR| java.lang.ClassNotFoundException: A$$Lambda$15/993989412 at java.net.URLClassLoader.findClass(URLClassLoader.java:387) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at org.utbot.instrumentation.process.HandlerClassesLoader.loadClass(ChildProcess.kt:63) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) at org.utbot.framework.plugin.api.util.IdUtilKt.getJClass(IdUtil.kt:100) at org.utbot.framework.concrete.UtAssembleModelConstructorsKt.findUtAssembleModelConstructor(UtAssembleModelConstructors.kt:91) at org.utbot.framework.concrete.UtModelConstructor.tryConstructUtAssembleModel(UtModelConstructor.kt:256) at org.utbot.framework.concrete.UtModelConstructor.constructFromAny(UtModelConstructor.kt:247) at org.utbot.framework.concrete.UtModelConstructor.construct(UtModelConstructor.kt:114) at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$1$1$concreteExecutionResult$1.invoke(UtExecutionInstrumentation.kt:197) at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$1$1$concreteExecutionResult$1.invoke(UtExecutionInstrumentation.kt:176) at org.utbot.framework.concrete.UtExecutionInstrumentation.withStaticFields(UtExecutionInstrumentation.kt:313) at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:176) at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:118) at org.utbot.instrumentation.process.ChildProcessKt$setup$2.invoke(ChildProcess.kt:211) at org.utbot.instrumentation.process.ChildProcessKt$setup$2.invoke(ChildProcess.kt:208) at org.utbot.instrumentation.process.ChildProcessKt$measureExecutionForTermination$2$1$1.invoke(ChildProcess.kt:190) at org.utbot.instrumentation.process.ChildProcessKt$measureExecutionForTermination$1.invokeSuspend(ChildProcess.kt:174) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106) at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284) at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59) at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38) at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source) at org.utbot.instrumentation.process.ChildProcessKt.measureExecutionForTermination(ChildProcess.kt:171) at org.utbot.instrumentation.process.ChildProcessKt.access$measureExecutionForTermination(ChildProcess.kt:1) at org.utbot.instrumentation.process.ChildProcessKt$measureExecutionForTermination$2$1.invokeSuspend(ChildProcess.kt:188) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106) at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:284) at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:85) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59) at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source) at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38) at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source) at org.utbot.instrumentation.process.ChildProcessKt$measureExecutionForTermination$2.invoke(ChildProcess.kt:187) at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182) at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182) at com.jetbrains.rd.framework.impl.RdCall.onWireReceived(RdTask.kt:360) at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:57) at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:56) at com.jetbrains.rd.framework.impl.ProtocolContexts.readMessageContextAndInvoke(ProtocolContexts.kt:148) at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:56) at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:54) at com.jetbrains.rd.util.threading.SingleThreadSchedulerBase.queue$lambda-3(SingleThreadScheduler.kt:41) 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:750)

Environment

Windows 10 Pro
JDK 8

[alisevych]

Reproducing on the latest main

with different Lambda usages

    Integer supplier(Supplier<Integer> supplier) {
        return supplier.get() * supplier.get();
    }

    Integer useSupplier(int i) {
        return supplier(() -> i * new Random().nextInt());
    }

    Function<Integer, Integer> function = integer -> integer * integer;

    Integer useFunction(int i) {
        return function.apply(i);
    }

The following exception is thrown by Concrete Executor:

17:41:35.315 | Error | ChildProcess              | 16:Scheduler for Client50635 |  | java.lang.ClassNotFoundException: org.utbot.examples.lambda.A$$Lambda$74/0x00000008001f3c40
	at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
	at org.utbot.instrumentation.process.HandlerClassesLoader.loadClass(ChildProcess.kt:48)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	at org.utbot.framework.plugin.api.util.IdUtilKt.getJClass(IdUtil.kt:102)
	at org.utbot.framework.concrete.UtAssembleModelConstructorsKt.findUtAssembleModelConstructor(UtAssembleModelConstructors.kt:91)
	at org.utbot.framework.concrete.UtModelConstructor.tryConstructUtAssembleModel(UtModelConstructor.kt:275)
	at org.utbot.framework.concrete.UtModelConstructor.constructFromAny(UtModelConstructor.kt:266)
	at org.utbot.framework.concrete.UtModelConstructor.construct(UtModelConstructor.kt:117)
	at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$1$concreteExecutionResult$1.invoke(UtExecutionInstrumentation.kt:195)
	at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$1$concreteExecutionResult$1.invoke(UtExecutionInstrumentation.kt:173)
	at org.utbot.framework.concrete.UtExecutionInstrumentation.withStaticFields(UtExecutionInstrumentation.kt:320)
	at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:173)
	at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:116)
	at org.utbot.instrumentation.process.ChildProcessKt$setup$2.invoke(ChildProcess.kt:125)
	at org.utbot.instrumentation.process.ChildProcessKt$setup$2.invoke(ChildProcess.kt:121)
	at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$1$1.invoke(ClientProcessUtil.kt:84)
	at org.utbot.rd.CallsSynchronizer.measureExecutionForTermination(ClientProcessUtil.kt:75)
	at org.utbot.rd.CallsSynchronizer$measureExecutionForTermination$1.invoke(ClientProcessUtil.kt:83)
	at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182)
	at com.jetbrains.rd.framework.IRdEndpoint$set$1.invoke(TaskInterfaces.kt:182)
	at com.jetbrains.rd.framework.impl.RdCall.onWireReceived(RdTask.kt:360)
	at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:57)
	at com.jetbrains.rd.framework.MessageBroker$invoke$2$2.invoke(MessageBroker.kt:56)
	at com.jetbrains.rd.framework.impl.ProtocolContexts.readMessageContextAndInvoke(ProtocolContexts.kt:148)
	at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:56)
	at com.jetbrains.rd.framework.MessageBroker$invoke$2.invoke(MessageBroker.kt:54)
	at com.jetbrains.rd.util.threading.SingleThreadSchedulerBase.queue$lambda-3(SingleThreadScheduler.kt:41)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)

[alisevych]

The issue is reproducing on the build from Sep 26 containing

• Disabled concrete execution for lambda results #989

with different lambdas listed in previous comments.