On win amd64, many operations (eg jstack -F) fail like this:

Caused by: java.lang.RuntimeException: Unable to deduce type of thread from address 0x00000000004b7800 (expected type JavaThread, CompilerThread, LowMemoryDetectorThread, JvmtiAgentThread, JVMPIDaemonThread or SurrogateLockerThread)
at sun.jvm.hotspot.runtime.Threads.createJavaThreadWrapper(Threads.java:125)
at sun.jvm.hotspot.runtime.Threads.first(Threads.java:113)
at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:48)
at sun.jvm.hotspot.tools.StackTrace.run(StackTrace.java:28)
at sun.jvm.hotspot.tools.JStack.run(JStack.java:43)
at sun.jvm.hotspot.tools.Tool.start(Tool.java:204)
at sun.jvm.hotspot.tools.JStack.main(JStack.java:69)
... 6 more
Caused by: sun.jvm.hotspot.types.WrongTypeException: No suitable match for type of address 0x00000000004b7800 (nearest symbol is jvm!??_7LowMemoryDetectorThread@@6B@)
at sun.jvm.hotspot.runtime.VirtualConstructor.instantiateWrapperFor(VirtualConstructor.java:78)