Plugin Build fails with "JellyTestSuiteBuilder"

[Stephan Watermeyer]

I am trying to release a new version of my plugin but the build keeps failing with the exception

Caused by: java.lang.IllegalArgumentException: Comparison method violates its general contract! at java.util.ComparableTimSort.mergeLo(ComparableTimSort.java:744) at java.util.ComparableTimSort.mergeAt(ComparableTimSort.java:481) at java.util.ComparableTimSort.mergeCollapse(ComparableTimSort.java:406) at java.util.ComparableTimSort.sort(ComparableTimSort.java:213) at java.util.Arrays.sort(Arrays.java:1312) at java.util.Arrays.sort(Arrays.java:1506) at java.util.ArrayList.sort(ArrayList.java:1462) at java.util.Collections.sort(Collections.java:143) at hudson.ExtensionList.sort(ExtensionList.java:320) at hudson.ExtensionList.ensureLoaded(ExtensionList.java:255) at hudson.ExtensionList.iterator(ExtensionList.java:143) at hudson.diagnosis.NullIdDescriptorMonitor.verify(NullIdDescriptorMonitor.java:68) at hudson.diagnosis.NullIdDescriptorMonitor.verifyId(NullIdDescriptorMonitor.java:89)  

I dont have a clue where the exception is comming from or what is wrong in my plugin. I would need some advise how to fix it.

Failing Build: 

https://ci.jenkins.io/job/Plugins/job/maven-artifact-choicelistprovider-plugin/job/master/58/testReport/junit/org.jvnet.hudson.test.junit/FailedTest/windows_8___Build__windows_8____org_jvnet_hudson_test_JellyTestSuiteBuilder$JellyTestSuite/

Code:

https://github.com/jenkinsci/maven-artifact-choicelistprovider-plugin

[Björn Pedersen]

My first guess would be the  Jenkinsfile ( it seems like a null is passed where null is not expected:

buildPlugin(jenkinsVersions: [null, '1.651.2'], failFast: false)

                                            ^^ 

[Stephan Watermeyer]

Thanks. But its also failing for local mvn builds.