micropython/tests/thread/stress_recurse.py

# test hitting the function recursion limit within a thread
#
# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd

import _thread

def foo():
    foo()

def thread_entry():
    try:
        foo()
    except RuntimeError:
        print('RuntimeError')
    global finished
    finished = True

finished = False

_thread.start_new_thread(thread_entry, ())

# busy wait for thread to finish
while not finished:
    pass
print('done')