Ronald Oussoren <[email protected]> added the comment:
The problem is related to recursion, the code basically ends up with an
unlimited number of iterations of select.select and test_select_mutated on the
call stack and this doesn't trigger the stack depth checker.
The following definition of class F triggers the same error:
class F:
def fileno(self):
test_select_mutated()
return self.fileno()
The call stack behaviour can be observed by using the fault handler
(``python3.9 -Xfaulthandler crash.py``), although you won't see select.select
in the traceback due to it being a C extension function.
Fixing this would basically require adding a stack depth check to the
PyObject_Call family of functions. I don't know if a PR for that would be
accepted due to the possible performance impact.
----------
nosy: +ronaldoussoren
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Python tracker <[email protected]>
<https://bugs.python.org/issue44718>
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