NullPointerException on detatch

[laeubi]

I thee the following NPE ocasionally when detaching a class

java.lang.NullPointerException
        at java.base/java.util.Hashtable.put(Unknown Source)
        at javassist.ClassPool.cacheCtClass(ClassPool.java:236)
        at javassist.CtClass.detach(CtClass.java:1427)

Code used here:

CtClass ctClass = pool.makeClass(new ByteArrayInputStream(getClassBytes()));
try {
	//do something with the class...
} finally {
	ctClass.detach();
}

As I cache ClassPool object, it might get confused when called from differen threads?

[laeubi]

But maybe there is more an intrinsic problem as I getting sometime spurious error also on other places.

[SACHDEVHITESH]

I am still getting the null pointer issue in the version 3.27.0-GA

Caused by: java.lang.NullPointerException
at javassist.ClassPool.cacheCtClass(ClassPool.java:236)
at javassist.CtClass.detach(CtClass.java:1427)
at com.microsoft.intune.mam.TransformationUnit.writeClassesToDirectory(TransformationUnit.java:275)
at com.microsoft.intune.mam.TransformationUnit.writeOutput(TransformationUnit.java:126)
at com.microsoft.intune.mam.BuildTimeMamifier.mamify(BuildTimeMamifier.java:131)
at com.microsoft.intune.mam.MamifyTransformBase.transform(MamifyTransformBase.java:195)
at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:284)
at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:69)
... 126 more

New issue Link
https://github.com/jboss-javassist/javassist/issues/442