9 print "*** This script is just for test use. It will crash!" 
   11 ctrack= test04.Track()
 
   12 print "<<< ref#(ctrack)=", sys.getrefcount(ctrack)
 
   13 cstep= ctrack.GetStep3()
 
   14 print "<<< ref#(ctrack, cstep)=",\
 
   15       sys.getrefcount(ctrack),\
 
   16       sys.getrefcount(cstep)
 
   18 print "<<< delete cstep" 
   19 print "<<< ref#(ctrack)=", sys.getrefcount(ctrack)
 
   23 cstep= ctrack.GetStep3()
 
   25 print "<<< previous step is still remain?" 
   29 print "--- stderr ---"