For example:
      if (abc == 0) {
            int ww = 89;
            int xx = 90;
        } else {
If a JDI client is stopped on the } else { line and calls StackFrame.visibleVariables(),
it won't see ww and xx even though they are still in scope.

Run this jtreg test to reproduce:
   /java/svc/ws/regressionTestsInWaiting/JdbWrongLocals.sh