HTML Reporter throwing null pointer error (NPE) - Mac (Catlaina: 10.15.3)

[DSEyers]

Can you look at this issue please:
bmuschko/gradle-clover-plugin#146

Apparently the issue is with OpenCloser ;(

[JasonWThompson]

I think it has to do with

clover/clover-core/src/main/java/com/atlassian/clover/reporters/html/RenderFileAction.java

Line 111 in c3729a8

if (columnsTL.get() == null) {

Here the code is attempting to get a value out of ThreadLocal object. I suspect that for one reason or another, either initThreadLocals is not being called or resetThreadLocals is being called before RenderFileAction.call

In any case, it's super irritating and breaking my builds in Jenkins. Though my build seem to work on my local device.

[INFO] Writing HTML report to '/home/jenkins/jenkins/workspace/my-project/target/site/clover'
[WARNING] null
java.lang.NullPointerException
    at com.atlassian.clover.reporters.html.RenderFileAction.call (RenderFileAction.java:111)
    at com.atlassian.clover.util.CloverExecutors$LoggingCallable.call (CloverExecutors.java:91)
    at java.util.concurrent.FutureTask.run (FutureTask.java:264)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1128)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:628)
    at java.lang.Thread.run (Thread.java:834)

[n-hebert]

Hello,

We're also experiencing this issue breaking builds on our Jenkins due to OpenClover.
The bug is active for us on both 4.4.0 and 4.4.1.

e.g.

[ant:clover-report] null
java.lang.NullPointerException
	at com.atlassian.clover.reporters.html.RenderFileAction.call(RenderFileAction.java:111)
	at com.atlassian.clover.util.CloverExecutors$LoggingCallable.call(CloverExecutors.java:91)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

It only seems to occur if we run partial tests (skip certain folders, classes, etc.), but if I do I see it on Jenkins, locally, and in GitLab Pipelines. Ergo it occurs on any clean workspace.

Is this potentially due to OpenClover expecting all classes in sight to be executed as tests?