human
Solve the following python programming problem given the following code:
def build(self, cdata, destructor) : 
    new_cdata = self.ffi.cast (self.ffi._backend.typeof (destructor), cdata) 
    def remove(key) : 
        old_key = self.data.pop (index) 
        assert (old_key is key) 
        destructor (cdata) 
key = ref (new_cdata, remove) 
    index = object () 
    self.data [index] = key 
    return new_cdata 

    
    

    Fix the buggy line: new_cdata = self.ffi.cast (self.ffi._backend.typeof (destructor), cdata)
assistant
#Here is Python program to fix the buggy line: new_cdata = self.

new_cdata = self.ffi.cast (self.ffi._backend.typeof (cdata), cdata)