ClassNotFoundException for a method returning Predicate

[alisevych]

Description

ClassNotFoundException is thrown in Concrete Execution of a method returning a Predicate.

To Reproduce

1. IntelliJ IDEA is opened
2. Download and install UnitTestBot plugin with merged Support lambda expressions #825
3. Check Settings : Symbolic execution is ON, Fuzzing is OFF

4. Add the following code to utbot-sample/src/main/java/org/utbot/examples/lambda/SimpleLambdaExamples.java
5. Generate tests for it with UTBot:

    public Predicate<Object> predicateEquals(Object a) {
        if (a != null) {
            return (o -> o.equals(a));
        } else {
            return (o -> o.equals(5));
        }
    }

Expected behavior

Tests are supposed to be generated.

Actual behavior

Test generation fails with error message.

Visual proofs (screenshots, logs, images)

ClassNotFoundException is thrown - see the stacktrace from Concrete Executor logs

java.lang.ClassNotFoundException: org.utbot.examples.lambda.SimpleLambdaExamples$$Lambda$67/0x000000080022f840
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:476)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
at org.utbot.instrumentation.process.HandlerClassesLoader.loadClass(ChildProcess.kt:63)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at org.utbot.framework.plugin.api.util.IdUtilKt.getJClass(IdUtil.kt:100)
at org.utbot.framework.concrete.UtAssembleModelConstructorsKt.findUtAssembleModelConstructor(UtAssembleModelConstructors.kt:91)
at org.utbot.framework.concrete.UtModelConstructor.tryConstructUtAssembleModel(UtModelConstructor.kt:256)
at org.utbot.framework.concrete.UtModelConstructor.constructFromAny(UtModelConstructor.kt:247)
at org.utbot.framework.concrete.UtModelConstructor.construct(UtModelConstructor.kt:114)
at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$1$1$concreteExecutionResult$1.invoke(UtExecutionInstrumentation.kt:195)
at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$1$1$concreteExecutionResult$1.invoke(UtExecutionInstrumentation.kt:174)
at org.utbot.framework.concrete.UtExecutionInstrumentation.withStaticFields(UtExecutionInstrumentation.kt:308)
at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:174)
at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:117)
at org.utbot.instrumentation.process.ChildProcessKt$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.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)

Environment

IntelliJ IDEA 2022.1.4
JDK 11
UTBotJava project, utbot-sample module

Additional context

JDK 11 is used. Predicate.not() can be added - compiling.

[Damtev]

Looks like a bug in a concrete execution, @sergeypospelov please take a look.