human
Solve the following python programming problem given the following code:
def match(template, tree) : 
    stack = [] 
    potential = [] 
    matches = [] 
    def _match(node) : 
        next_potential = [] 
        for p in potential : 
            if (stack [: len (p ['stack'])] != p ['stack']) : 
                matches.append (p) 
else : 
                path = stack [len (p ['stack']) :] 
                sub_template = get_sub_template (template, path) 
                if node_matches (node, sub_template, p ['context']) : 
                    next_potential.append (p) 
potential [:] = next_potential 
        context = { 
            'names' : { 
                
}, 
            'rev' : { 
                
}, 
            'captures' : { 
                
}, 
} 
        if node_matches (node, template, context) : 
            potential.append ({ 
                'stack' : stack [:], 
                'node' : (node [0] if is_list (node) else node), 
                'context' : context, 
}) 
if isinstance (node, ast.AST) : 
            for (name, value) in ast.iter_fields (node) : 
                stack.append (name) 
                _match (value) 
                stack.pop () 
else : 
            if (isinstance (node, list) and node) : 
                stack.append (0) 
                _match (node [0]) 
                stack.pop () 
                stack.append (1) 
                _match (node [1 :]) 
                stack.pop () 
_match (tree) 
    results = [] 
    for m in (matches + potential) : 
        m ['node'].captures = m ['context'] ['captures'] 
        results.append (stack ['node']) 
return results 

    
    

    Fix the buggy line: results.append (stack ['node'])
assistant
#Here is Python program to fix the buggy line: results.

results.append (m ['node'])