JDIStackFrame popFrame = null;
Iterator<JDIStackFrame> iter = popFrames.iterator();
while (iter.hasNext()) {
try {
popFrame = iter.next();
popFrame.popFrame();
poppedThreads.add(popFrame.getThread());
} catch (DebugException de) {
poppedThreads.remove(popFrame.getThread());
notifyFailedDrop(
((JDIThread) popFrame.getThread()).computeStackFrames(),