The following error happens in hs-tier2 testing. Seems to happen on OSX only.
...
0x00000007e4ba3b68 java/lang/String
0x00000007e4ba3bf8 java/lang/String
0x00000007e4ba3c88 java/lang/String
0x00000007e4ba3cc0 java/lang/String
0x00000007e4ba3e98 java/lang/String
Error: java.lang.NullPointerException
java.lang.NullPointerException
at jdk.hotspot.agent/sun.jvm.hotspot.memory.FileMapInfo$FileMapHeader.inCopiedVtableSpace(FileMapInfo.java:154)
at jdk.hotspot.agent/sun.jvm.hotspot.memory.FileMapInfo.inCopiedVtableSpace(FileMapInfo.java:134)
at jdk.hotspot.agent/sun.jvm.hotspot.types.basic.BasicTypeDataBase.findDynamicTypeForAddress(BasicTypeDataBase.java:302)
at jdk.hotspot.agent/sun.jvm.hotspot.runtime.VirtualBaseConstructor.instantiateWrapperFor(VirtualBaseConstructor.java:102)
at jdk.hotspot.agent/sun.jvm.hotspot.oops.Metadata.instantiateWrapperFor(Metadata.java:76)
at jdk.hotspot.agent/sun.jvm.hotspot.utilities.RobustOopDeterminator.oopLooksValid(RobustOopDeterminator.java:75)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor$33.doit(CommandProcessor.java:1191)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2113)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.executeCommand(CommandProcessor.java:2083)
at jdk.hotspot.agent/sun.jvm.hotspot.CommandProcessor.run(CommandProcessor.java:1963)
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:280)
at jdk.hotspot.agent/sun.jvm.hotspot.SALauncher.main(SALauncher.java:483)
hsdb> + quit