Incorrect node tree                             Correct node tree
--------------------------------------------------------------------------------------
Pattern=<(a)?bc|d>                                   Pattern=<(a)?bc|d>                   
Input  =<d>					     Input  =<d>                          
     1:  <Branch> (0)				          1:  <Branch> (0)                
     2:    <Group1> (3)				          2:    <Branch> (0)              
     3:      <Single  'a'> (4)			          3:      <Group1> (4)            
     4:    </Group1> (6)			          4:        <Single  'a'> (5)     
         <Branch>				          5:      </Group1> (6)           
         <branch ACCEPT(null)>			                <Branch>                  
         <Branch>				                <branch ACCEPT(null)>     
     5:    <Single  'd'> --> </Branch> (8)	          6:    </Branch> (7)             
     6:  </Branch> (7)				          7:    <Slice  "bc"> (9)         
     7:  <Slice  "bc"> (8)			              <Branch>                    
     8:  <DONE> (0)				          8:    <Single  'd'> (9)         
    -------------------------------		          9:  </Branch> (10)              
find:false					         10:  <DONE> (0)                  
						         -------------------------------  
                     				     find:true