Factorial function failure

[zhelenskiy]

import java.util.*;
import java.math.*;

public class Solution {
  BigInteger f(long x) {
    if (x == 0) {
      return BigInteger.ONE;
    } else {
      return BigInteger.valueOf(x).multiply(f(x - 1));
    }
  } 
}

The result is

TEST GENERATION: SUCCEEDED
20:14:32.181 | INFO  | CacheClassProvider | Loaded: 3 path entries, 19922 classes, 62290443 bytes
20:14:33.166 | INFO  | UtBotTestCaseGenerator | |> Resuming method Solution.f(long)
20:14:45.982 | INFO  | Summarization | Diversity execution path percentage: 100
20:14:45.982 | ERROR | ConcreteExecutor | Unexpected error while sending to channel in 18: ConcreteExecutor-53-receiver, cmd=(0, ExceptionInKryoCommand(exception=java.lang.ThreadDeath))
kotlinx.coroutines.channels.ClosedSendChannelException: Channel was closed
	at kotlinx.coroutines.channels.Closed.getSendException(AbstractChannel.kt:1105) ~[utbot-cli.jar:?]
	at kotlinx.coroutines.channels.AbstractSendChannel.helpCloseAndResumeWithSendException(AbstractChannel.kt:210) ~[utbot-cli.jar:?]
	at kotlinx.coroutines.channels.AbstractSendChannel.access$helpCloseAndResumeWithSendException(AbstractChannel.kt:19) ~[utbot-cli.jar:?]
	at kotlinx.coroutines.channels.AbstractSendChannel.sendSuspend(AbstractChannel.kt:200) ~[utbot-cli.jar:?]
	at kotlinx.coroutines.channels.AbstractSendChannel.send(AbstractChannel.kt:137) ~[utbot-cli.jar:?]
	at com.huawei.utbot.instrumentation.ConcreteExecutor$restartIfNeeded$$inlined$bracket$lambda$1$1$1.invokeSuspend(ConcreteExecutor.kt:263) [utbot-cli.jar:?]
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33) [utbot-cli.jar:?]
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106) [utbot-cli.jar:?]
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:274) [utbot-cli.jar:?]
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:84) [utbot-cli.jar:?]
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59) [utbot-cli.jar:?]
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source) [utbot-cli.jar:?]
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38) [utbot-cli.jar:?]
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source) [utbot-cli.jar:?]
	at com.huawei.utbot.instrumentation.ConcreteExecutor$restartIfNeeded$$inlined$bracket$lambda$1$1.invoke(ConcreteExecutor.kt:249) [utbot-cli.jar:?]
	at com.huawei.utbot.instrumentation.ConcreteExecutor$restartIfNeeded$$inlined$bracket$lambda$1$1.invoke(ConcreteExecutor.kt:101) [utbot-cli.jar:?]
	at kotlin.concurrent.ThreadsKt$thread$thread$1.run(Thread.kt:30) [utbot-cli.jar:?]
20:14:45.990 | INFO  | Summarization | No execution traces found in test case for method Solution,     java.math.BigInteger f(long)
    {
        long l0, $l2;
        byte $b1;
        java.math.BigInteger $r0, $r2, $r3, $r4;
        Solution r1;

        r1 := @this: Solution;

        l0 := @parameter0: long;

        $b1 = l0 cmp 0L;

        if $b1 != 0 goto label1;

        $r4 = <java.math.BigInteger: java.math.BigInteger ONE>;

        return $r4;

     label1:
        $r0 = staticinvoke <java.math.BigInteger: java.math.BigInteger valueOf(long)>(l0);

        $l2 = l0 - 1L;

        $r2 = virtualinvoke r1.<Solution: java.math.BigInteger f(long)>($l2);

        $r3 = virtualinvoke $r0.<java.math.BigInteger: java.math.BigInteger multiply(java.math.BigInteger)>($r2);

        return $r3;
    }


TEST RUN: SUCCEEDED
Tests run: 1
Succeeded tests: 0
Failed tests: 1

***FAILED TESTS INFO***
Test header: initializationError(SolutionTest)
Exception: org.junit.runners.model.InvalidTestClassError: Invalid test class 'SolutionTest':
  1. No runnable methods
Message: Invalid test class 'SolutionTest':
  1. No runnable methods
Description: initializationError(SolutionTest)

Ignored tests: 0
Run tests: FAILED
Running the entire test suite - completed in 3 (ms)

Btw, ❤️ for using Kotlin and coroutines from me as the Kotlin team member.