[INFO] Running org.jenkinsci.plugins.postbuildscript.PostBuildScriptIT
[ERROR] Tests run: 6, Failures: 0, Errors: 3, Skipped: 0, Time elapsed: 10.43 s <<< FAILURE! -- in org.jenkinsci.plugins.postbuildscript.PostBuildScriptIT
[ERROR] org.jenkinsci.plugins.postbuildscript.PostBuildScriptIT.executesPostBuildStep -- Time elapsed: 2.058 s <<< ERROR!
java.lang.RuntimeException: java.io.IOException: java.lang.RuntimeException: Failed to serialize hudson.model.Project#publishers for class hudson.model.FreeStyleProject
	at hudson.util.PersistedList._onModified(PersistedList.java:223)
	at hudson.util.PersistedList.add(PersistedList.java:82)
	at org.jenkinsci.plugins.postbuildscript.PostBuildScriptIT.whenBuilt(PostBuildScriptIT.java:199)
	at org.jenkinsci.plugins.postbuildscript.PostBuildScriptIT.executesPostBuildStep(PostBuildScriptIT.java:118)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)
	at org.jvnet.hudson.test.JenkinsRule$1.evaluate(JenkinsRule.java:607)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.io.IOException: java.lang.RuntimeException: Failed to serialize hudson.model.Project#publishers for class hudson.model.FreeStyleProject
	at hudson.XmlFile.write(XmlFile.java:220)
	at hudson.model.AbstractItem.save(AbstractItem.java:619)
	at hudson.model.Job.save(Job.java:195)
	at hudson.model.AbstractProject.save(AbstractProject.java:288)
	at hudson.util.PersistedList.onModified(PersistedList.java:190)
	at hudson.util.PersistedList._onModified(PersistedList.java:221)
	... 7 more
Caused by: java.lang.RuntimeException: Failed to serialize hudson.model.Project#publishers for class hudson.model.FreeStyleProject
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44)
	at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:83)
	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)
	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1303)
	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1292)
	at com.thoughtworks.xstream.XStream.toXML(XStream.java:1265)
	at hudson.XmlFile.write(XmlFile.java:213)
	... 12 more
Caused by: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.postbuildscript.PostBuildScript#config for class org.jenkinsci.plugins.postbuildscript.PostBuildScript
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:87)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeBareItem(AbstractCollectionConverter.java:94)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:66)
	at hudson.util.DescribableList$ConverterImpl.marshal(DescribableList.java:274)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 25 more
Caused by: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.postbuildscript.model.Configuration#buildSteps for class org.jenkinsci.plugins.postbuildscript.model.Configuration
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 41 more
Caused by: java.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.postbuildscript.model.PostBuildStep#buildSteps for class org.jenkinsci.plugins.postbuildscript.model.PostBuildStep
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:87)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeBareItem(AbstractCollectionConverter.java:94)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:66)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeCompleteItem(AbstractCollectionConverter.java:81)
	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:75)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 50 more
Caused by: java.lang.RuntimeException: Failed to serialize hudson.tasks.BuildStep$MockitoMock$Zrd1V0jf#mockitoInterceptor for class hudson.tasks.BuildStep$MockitoMock$Zrd1V0jf
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:87)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeBareItem(AbstractCollectionConverter.java:94)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:66)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeCompleteItem(AbstractCollectionConverter.java:81)
	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:75)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 67 more
Caused by: java.lang.RuntimeException: Failed to serialize org.mockito.internal.handler.InvocationNotifierHandler#mockHandler for class org.mockito.internal.handler.InvocationNotifierHandler
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:87)
	at com.thoughtworks.xstream.converters.reflection.SerializableConverter$1.defaultWriteObject(SerializableConverter.java:212)
	at com.thoughtworks.xstream.converters.reflection.SerializableConverter.doMarshal(SerializableConverter.java:272)
	at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.marshal(AbstractReflectionConverter.java:90)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 84 more
Caused by: java.lang.RuntimeException: Failed to serialize org.mockito.internal.handler.NullResultGuardian#delegate for class org.mockito.internal.handler.NullResultGuardian
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 100 more
Caused by: java.lang.RuntimeException: Failed to serialize org.mockito.internal.handler.MockHandlerImpl#invocationContainer for class org.mockito.internal.handler.MockHandlerImpl
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 109 more
Caused by: java.lang.RuntimeException: Failed to serialize org.mockito.internal.stubbing.InvocationContainerImpl#stubbed for class org.mockito.internal.stubbing.InvocationContainerImpl
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 118 more
Caused by: java.lang.RuntimeException: Failed to serialize org.mockito.internal.stubbing.StubbedInvocationMatcher#answers for class org.mockito.internal.stubbing.StubbedInvocationMatcher
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:274)
	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:241)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:174)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:226)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:87)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeBareItem(AbstractCollectionConverter.java:94)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeItem(AbstractCollectionConverter.java:66)
	at com.thoughtworks.xstream.converters.collections.AbstractCollectionConverter.writeCompleteItem(AbstractCollectionConverter.java:81)
	at com.thoughtworks.xstream.converters.collections.CollectionConverter.marshal(CollectionConverter.java:75)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 127 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private static final long java.util.concurrent.ConcurrentLinkedQueue.serialVersionUID accessible: module java.base does not "opens java.util.concurrent" to unnamed module @34e9fd99
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
	at com.thoughtworks.xstream.converters.reflection.FieldDictionary.buildDictionaryEntryForClass(FieldDictionary.java:176)
	at com.thoughtworks.xstream.converters.reflection.FieldDictionary.buildMap(FieldDictionary.java:142)
	at com.thoughtworks.xstream.converters.reflection.FieldDictionary.fieldsFor(FieldDictionary.java:80)
	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:167)
	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:206)
	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:163)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68)
	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:59)
	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:83)
	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:283)
	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:270)
	... 144 more