Nighly tests for ThreadReference.frameCount() fail with the following exception stack trace:

## ERROR: ThreadReference.frameCount() throws unexpected exception:
## ERROR: thread nom: 0
## ERROR: thread name: threadRunning
## ERROR: exception: sun.jvm.hotspot.utilities.AssertionFailure: must be a valid non-zero index
# thread #1
# thread name: threadEntering
# isSuspended: true
#sun.jvm.hotspot.utilities.AssertionFailure: must be a valid non-zero index
# at sun.jvm.hotspot.utilities.Assert.that(Assert.java:15)
# at sun.jvm.hotspot.code.CodeBlob.getOopAt(CodeBlob.java:150)
# at sun.jvm.hotspot.code.DebugInfoReadStream.readOopHandle(DebugInfoReadStream.java:21)
# at sun.jvm.hotspot.code.ScopeDesc.<init>(ScopeDesc.java:40)
# at sun.jvm.hotspot.code.NMethod.getScopeDescNearDbg(NMethod.java:275)
# at sun.jvm.hotspot.runtime.VFrame.newVFrame(VFrame.java:56)
# at sun.jvm.hotspot.runtime.VFrame.sender(VFrame.java:112)
# at sun.jvm.hotspot.runtime.VFrame.javaSender(VFrame.java:134)
# at sun.jvm.hotspot.runtime.JavaThread.getLastJavaVFrameDbg(JavaThread.java:217)
# at sun.jvm.hotspot.jdi.ThreadReferenceImpl.privateFrames(ThreadReferenceImpl.java:197)
# at sun.jvm.hotspot.jdi.ThreadReferenceImpl.frameCount(ThreadReferenceImpl.java:162)
# at nsk.sajdi.ThreadReference.frames_ii.frames_ii002.checkThread(frames_ii002.java:201)
# at nsk.sajdi.ThreadReference.frames_ii.frames_ii002.runIt(frames_ii002.java:147)
# at nsk.sajdi.ThreadReference.frames_ii.frames_ii002.run(frames_ii002.java:26)
# at nsk.sajdi.ThreadReference.frames_ii.frames_ii002.main(frames_ii002.java:21)
This bug affects the following NSK tests:

    nsk/sajdi/ThreadReference/frame/frame002
    nsk/sajdi/ThreadReference/frames/frames002
    nsk/sajdi/ThreadReference/frames_ii/frames_ii002
    nsk/sajdi/StackFrame/getValues/getvalues001
    nsk/sajdi/StackFrame/thisObject/thisobj001
    nsk/sajdi/StackFrame/visibleVariables/visibvars001
    nsk/sajdi/VMCannotBeModifiedException/thrown/thrown003