Fuzzing mode with JDK 13/17 `CommonMocksExample.nextValue`. 343 errors in Concrete Executor

[alisevych]

Description

Fuzzing test generation for CommonMocksExample.nextValue. 343 errors in Concrete Executor

To Reproduce

1. Install plugin built from the latest main into IDEA 2022.2.3
2. Create IntelliJ project with JDK 13 / 17 - not reproducing with JDK 11.
3. Create CommonMocksExample java class:

public class CommonMocksExample {
    public RecursiveTypeClass nextValue(RecursiveTypeClass node) {
        if (node.next == node) {
            return node;
        }

        node.next.value = node.value + 1;

        return node;
    }
}

4. Create RecursiveTypeClass in the same package

public class RecursiveTypeClass {
    public RecursiveTypeClass next;
    public int value;
}

5. Generate tests for CommonMocksExample
6. Open the generated test

Expected behavior

Tests are supposed to be generated without errors.

Actual behavior

An error test is generated with information about 343 errors in the concrete executor.

Visual proofs (screenshots, logs, images)

    ///region Errors report for nextValue

    public void testNextValue_errors() {
        // Couldn't generate some tests. List of errors:
        // 
        // 343 occurrences of:
        // Default concrete execution failed

    }
    ///endregion

There are 344 exceptions with the following stack trace:

Error | ChildProcess              | 18:Scheduler for Client57486 |  | java.lang.NoSuchFieldException: modifiers
	at java.base/java.lang.Class.getDeclaredField(Class.java:2610)
	at org.utbot.framework.concrete.MockValueConstructor.constructObject(MockValueConstructor.kt:190)
	at org.utbot.framework.concrete.MockValueConstructor.construct(MockValueConstructor.kt:130)
	at org.utbot.framework.concrete.MockValueConstructor.constructMethodParameters(MockValueConstructor.kt:107)
	at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:153)
	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:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)

Environment

IntelliJ IDEA 2022.2.3

[Markoutte]

The problem is not fuzzing-related, but it is caused by

java.lang.NoSuchFieldException: modifiers
	at java.base/java.lang.Class.getDeclaredField(Class.java:2610)
	at org.utbot.framework.concrete.MockValueConstructor.constructObject(MockValueConstructor.kt:190)

Please, note, that if fuzzing is completely off then symbolic execution fails to create any test except one with null value. For Java 11 and below it creates several tests.

cc @alisevych, @denis-fokin

[alisevych]

@denis-fokin
Reproducing on the latest main.
Added stack trace from Concrete executor logs.

[alisevych]

rdEngineProcessLogs:
5178447990325224680-0.log