Site. Test generation fails with NPE

[alisevych]

Description

Test generation on utbot.org is failing for any compiling Java class with NPE: member.declaringClass.package must not be null

To Reproduce

Steps to reproduce the behavior:

1. Open utbot.org
2. Add the following code
3. Press Generate and Run Tests

Expected behavior

Tests are supposed to be generated.

Actual behavior

The following error is displayed:

Status Code: TEST_GENERATION_FAILED

TEST GENERATION: TEST_GENERATION_FAILED
09:46:03.246 | INFO  | AllInMemoryClassProvider | Loaded: 3 path entries, 19929 classes, 62321710 bytes
09:46:04.043 | INFO  | TestCaseGenerator | |> Resuming method test.q(int)
09:46:04.428 | ERROR | GenerateTestsCommand | An error has occurred while generating test for snippet test : java.lang.NullPointerException: member.declaringClass.`package` must not be null
java.lang.NullPointerException: member.declaringClass.`package` must not be null
	at org.utbot.fuzzer.providers.ObjectModelProvider$Companion.isAccessible(ObjectModelProvider.kt:156)
	at org.utbot.fuzzer.providers.ObjectModelProvider$Companion.access$isAccessible(ObjectModelProvider.kt:145)
	at org.utbot.fuzzer.providers.ObjectModelProvider$generate$1$invokeSuspend$$inlined$with$lambda$1$1.invoke(ObjectModelProvider.kt:76)
	at org.utbot.fuzzer.providers.ObjectModelProvider$generate$1$invokeSuspend$$inlined$with$lambda$1$1.invoke(ObjectModelProvider.kt:37)
	at kotlin.sequences.FilteringSequence$iterator$1.calcNext(Sequences.kt:171)
	at kotlin.sequences.FilteringSequence$iterator$1.hasNext(Sequences.kt:194)
	at kotlin.sequences.TransformingSequence$iterator$1.hasNext(Sequences.kt:214)
	at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:752)
	at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:782)
	at kotlin.sequences.SequencesKt___SequencesKt$sortedWith$1.iterator(_Sequences.kt:603)
	at kotlin.sequences.TakeSequence$iterator$1.<init>(Sequences.kt:411)
	at kotlin.sequences.TakeSequence.iterator(Sequences.kt:409)
	at kotlin.sequences.SequencesKt___SequencesKt$flatMap$2.invoke(_Sequences.kt:819)
	at kotlin.sequences.SequencesKt___SequencesKt$flatMap$2.invoke(_Sequences.kt)
	at kotlin.sequences.FlatteningSequence$iterator$1.ensureItemIterator(Sequences.kt:315)
	at kotlin.sequences.FlatteningSequence$iterator$1.hasNext(Sequences.kt:303)
	at org.utbot.fuzzer.providers.ObjectModelProvider$generate$1.invokeSuspend(ObjectModelProvider.kt:240)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlin.sequences.SequenceBuilderIterator.hasNext(SequenceBuilder.kt:140)
	at org.utbot.fuzzer.ModelProvider$withFallback$1$1.invokeSuspend(ModelProvider.kt:142)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlin.sequences.SequenceBuilderIterator.hasNext(SequenceBuilder.kt:140)
	at kotlin.sequences.TakeSequence$iterator$1.hasNext(Sequences.kt:421)
	at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:752)
	at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:782)
	at kotlin.sequences.SequencesKt__SequencesKt$shuffled$1.invokeSuspend(Sequences.kt:140)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlin.sequences.SequenceBuilderIterator.hasNext(SequenceBuilder.kt:140)
	at kotlin.sequences.TransformingSequence$iterator$1.hasNext(Sequences.kt:214)
	at kotlin.sequences.SequencesKt___SequencesKt.first(_Sequences.kt:110)
	at org.utbot.engine.UtBotSymbolicEngine$fuzzing$2.invokeSuspend(UtBotSymbolicEngine.kt:406)
	at org.utbot.engine.UtBotSymbolicEngine$fuzzing$2.invoke(UtBotSymbolicEngine.kt)
	at kotlinx.coroutines.flow.SafeFlow.collectSafely(Builders.kt:61)
	at kotlinx.coroutines.flow.AbstractFlow.collect(Flow.kt:212)
	at kotlinx.coroutines.flow.FlowKt__MergeKt$flattenConcat$$inlined$unsafeFlow$1$lambda$1.emit(Collect.kt:134)
	at kotlinx.coroutines.flow.FlowKt__BuildersKt$flowOf$$inlined$unsafeFlow$1.collect(SafeCollector.common.kt:114)
	at kotlinx.coroutines.flow.FlowKt__MergeKt$flattenConcat$$inlined$unsafeFlow$1.collect(SafeCollector.common.kt:114)
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$4$1$1.invokeSuspend(TestCaseGenerator.kt:369)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:274)
	at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:84)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:59)
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
	at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:38)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
	at org.utbot.common.ConcurrencyKt.runBlockingWithCancellationPredicate(Concurrency.kt:38)
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$4.invoke(TestCaseGenerator.kt:158)
	at org.utbot.framework.plugin.api.TestCaseGenerator$generate$4.invoke(TestCaseGenerator.kt:51)
	at org.utbot.common.ConcurrencyKt.runIgnoringCancellationException(Concurrency.kt:47)
	at org.utbot.framework.plugin.api.TestCaseGenerator.generate(TestCaseGenerator.kt:157)
	at org.utbot.framework.plugin.api.TestCaseGenerator.generate$default(TestCaseGenerator.kt:144)
	at org.utbot.cli.GenerateTestsAbstractCommand.generateTestSets(GenerateTestsAbstractCommand.kt:162)
	at org.utbot.cli.GenerateTestsCommand.run(GenerateTestsCommand.kt:105)
	at com.github.ajalt.clikt.parsers.Parser.parse(Parser.kt:204)
	at com.github.ajalt.clikt.parsers.Parser.parse(Parser.kt:213)
	at com.github.ajalt.clikt.parsers.Parser.parse(Parser.kt:17)
	at com.github.ajalt.clikt.core.CliktCommand.parse(CliktCommand.kt:396)
	at com.github.ajalt.clikt.core.CliktCommand.parse$default(CliktCommand.kt:393)
	at com.github.ajalt.clikt.core.CliktCommand.main(CliktCommand.kt:411)
	at com.github.ajalt.clikt.core.CliktCommand.main(CliktCommand.kt:436)
	at org.utbot.cli.ApplicationKt.main(Application.kt:31)

TEST RUN: ERROR OCCURRED
[object Object]: no details

Additional context

On July 14 the generation could be run.
Checked with different code - same exception - if the code is compiling.

[viktoriia-fomina]

Fixed with #544