The following test failed in the JDK20 CI:

vmTestbase/nsk/jvmti/scenarios/hotswap/HS204/hs204t001/hs204t001.java

Here's a snippet from the log file:

#section:main
----------messages:(4/435)----------
command: main -agentlib:hs204t001=pathToNewByteCode=./bin,-waittime=5,package=nsk,samples=100,mode=compiled nsk.jvmti.scenarios.hotswap.HS204.hs204t001.hs204t001
reason: User specified action: run main/othervm/native -agentlib:hs204t001=pathToNewByteCode=./bin,-waittime=5,package=nsk,samples=100,mode=compiled nsk.jvmti.scenarios.hotswap.HS204.hs204t001.hs204t001
Mode: othervm [/othervm specified]
elapsed time (seconds): 0.631
----------configuration:(0/0)----------
----------System.out:(11/388)----------
... timeout.. 10
.. Path ./bin
 Testing started..
# info :: File = ./bin/newclass00/nsk/jvmti/scenarios/hotswap/HS204/hs204t001/hs204t001R.class
# info **Agent:: opening file ./bin/newclass00/nsk/jvmti/scenarios/hotswap/HS204/hs204t001/hs204t001R.class
# info file size= 1120
 File red completely
hs204t001R
 started running thread..
... Inside doThisThread..
 State..4440
----------System.err:(7/738)----------
java version "20-ea" 2023-03-21
Java(TM) SE Runtime Environment (fastdebug build 20-ea+4-137)
Java HotSpot(TM) 64-Bit Server VM (fastdebug build 20-ea+4-137, mixed mode)
java.lang.NullPointerException: Cannot invoke "java.util.concurrent.atomic.AtomicBoolean.get()" because "nsk.jvmti.scenarios.hotswap.HS204.hs204t001.hs204t001R.run" is null
at nsk.jvmti.scenarios.hotswap.HS204.hs204t001.hs204t001R.doInThisThread(hs204t001R.java:44)
at nsk.jvmti.scenarios.hotswap.HS204.hs204t001.hs204t001R.run(hs204t001R.java:38)
STATUS:Failed.`main' threw exception: java.lang.NullPointerException: Cannot invoke "java.util.concurrent.atomic.AtomicBoolean.get()" because "nsk.jvmti.scenarios.hotswap.HS204.hs204t001.hs204t001R.run" is null
----------rerun:(39/6801)*----------