/home/jini/jdk10/hs/build/linux-x86_64-normal-server-slowdebug/images/jdk/bin/java -Xshare:on -cp ~/tests/ HelloAndLoop
Hello -- and Loop
....after attaching using jhsdb

hsdb> where -a
Thread 3011 Address: 0x00007fdb502da000

Java Stack Trace for Service Thread
Thread state = BLOCKED

Thread 3010 Address: 0x00007fdb5023c800
sun.jvm.hotspot.utilities.AssertionFailure: illegal code 236
        at jdk.hotspot.agent/sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
        at jdk.hotspot.agent/sun.jvm.hotspot.interpreter.Bytecodes.check(Bytecodes.java:338)
        at jdk.hotspot.agent/sun.jvm.hotspot.interpreter.Bytecodes.javaCode(Bytecodes.java:380)
        at jdk.hotspot.agent/sun.jvm.hotspot.interpreter.BytecodeStream.next(BytecodeStream.java:78)
        at jdk.hotspot.agent/sun.jvm.hotspot.oops.GenerateOopMap$RetTable.computeRetTable(GenerateOopMap.java:228)
        at jdk.hotspot.agent/sun.jvm.hotspot.oops.GenerateOopMap.computeMap(GenerateOopMap.java:2191)
        at jdk.hotspot.agent/sun.jvm.hotspot.interpreter.OopMapForCacheEntry.computeMap(OopMapForCacheEntry.java:80)
        at jdk.hotspot.agent/sun.jvm.hotspot.interpreter.OopMapCacheEntry.fill(OopMapCacheEntry.java:53)
        at jdk.hotspot.agent/sun.jvm.hotspot.oops.Method.getMaskFor(Method.java:261)
        at jdk.hotspot.agent/sun.jvm.hotspot.runtime.InterpretedVFrame.getLocals(InterpretedVFrame.java:53)
        at jdk.hotspot.agent/sun.jvm.hotspot.ui.classbrowser.HTMLGenerator.genHTMLForJavaStackTrace(HTMLGenerator.java:1929)
        at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor$44.doit(CommandProcessor.java:1577)
        at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:1963)
        at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:1933)
        at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.run(CommandProcessor.java:1813)
        at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.run(CLHSDB.java:99)
        at jdk.hotspot.agent/sun.jvm.hotspot.CLHSDB.main(CLHSDB.java:40)
        at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.runCLHSDB(SALauncher.java:191)
        at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:439)
Error: sun.jvm.hotspot.utilities.AssertionFailure: Failure occurred at bci 16 in method java.lang.ref.ReferenceQueue.remove(long)