Migen Simulator "Recursion Depth Exceeded" Example

recur.py

from migen import *

class Recur(Module):
    def __init__(self):
        self.divider = Signal(16)
        self.half_of_divider = Signal(16)
        
        ###
        
        self.sync += [self.half_of_divider[:15].eq(self.divider[1:] - 1)]

def recur_test(m):
    yield

if __name__ == "__main__":
    m = Recur()
    run_simulation(m, recur_test(m))