human
Solve the following python programming problem given the following code:
def _kernel_call(self, args, griddim, blockdim, stream = 0, sharedmem = 0) : 
    cufunc = self._func.get () 
    if self.debug : 
        excname = (prefix.name + '__errcode__') 
        (excmem, excsz) = cufunc.module.get_global_symbol (excname) 
        assert (excsz == ctypes.sizeof (ctypes.c_int)) 
        excval = ctypes.c_int () 
        excmem.memset (0, stream = stream) 
retr = [] 
    kernelargs = [] 
    for (t, v) in zip (self.argument_types, args) : 
        self._prepare_args (t, v, stream, retr, kernelargs) 
cu_func = cufunc.configure (griddim, blockdim, stream = stream, sharedmem = sharedmem) 
    cu_func (* kernelargs) 
    if self.debug : 
        driver.device_to_host (ctypes.addressof (excval), excmem, excsz) 
        if (excval.value != 0) : 
            def load_symbol(name) : 
                (mem, sz) = cufunc.module.get_global_symbol (('%s__%s__' % (cufunc.name, name))) 
                val = ctypes.c_int () 
                driver.device_to_host (ctypes.addressof (val), mem, sz) 
                return val.value 
tid = [load_symbol (('tid' + i)) for i in 'zyx'] 
            ctaid = [load_symbol (('ctaid' + i)) for i in 'zyx'] 
            code = excval.value 
            (exccls, exc_args) = self.call_helper.get_exception (code) 
            prefix = ('tid=%s ctaid=%s' % (tid, ctaid)) 
            if exc_args : 
                exc_args = ((('%s: %s' % (prefix, exc_args [0])),) + exc_args [1 :]) 
else : 
                exc_args = (prefix,) 
raise exccls (* exc_args) 
for wb in retr : 
        wb () 

    
    

    Fix the buggy line: excname = (prefix.name + '__errcode__')
assistant
#Here is Python code to fix the buggy line: excname = (prefix.

excname = (cufunc.name + '__errcode__')