----------System.err:(17/1221)----------
java.lang.RuntimeException: Test ERROR java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1
	at ClhsdbFindPC.testFindPC(ClhsdbFindPC.java:155)
	at ClhsdbFindPC.main(ClhsdbFindPC.java:167)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
	at java.base/java.lang.Thread.run(Thread.java:832)
Caused by: java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1
	at ClhsdbFindPC.testFindPC(ClhsdbFindPC.java:118)
	... 7 more

From this code:

            String[] parts = output.split("LingeredAppWithTrivialMain.main");
            String[] tokens = parts[1].split(" ");

so looks like the split failed, most likely due to the output being empty.