[issue41318] Better error message of "Cannot recover from stack overflow."
New submission from Heyi Tang :
Is it possible to add more detailed message for the error "Cannot recover from
stack overflow"?
Something like "Cannot recover from stack overflow, it may be caused by
catching a RecursionError but reaching the limit again before properly handling
it."
Maybe the detailed design in
https://github.com/python/cpython/blob/master/Include/ceval.h#L48 could also be
shown to the developer?
It is hard to understand what happened only with the message "Cannot recover
from stack overflow".
I hit the error because I write the code as following:
@some_logger
def f():
return f()
try:
f()
except RecursionError:
print("Recursion Error is raised!")
And it took me a lot of time to figure out why RecursionError is not raised but
the "Fatal Python error" is shown.
Finally I realized that the problem is that the following code piece in
"some_logger" (Which is an internal library provided by others) caught the
exception and make tstate->overflowed=1.
def some_logger(func):
@functools.wraps(func)
def new_func(*args, **kwargs):
try:
# Unfortunately this code hit RecursionError and catched it
logger.info(some_message)
except Exception as e:
pass # Avoid affecting user function
return func(*args, **kwargs)
return new_func
So I think it might be better to provide more information to the developer that
"Cannot recover" means that "RecursionError is caught and stack overflow
again." and hint user to know the design of _Py_EnterRecursiveCall.
--
components: Interpreter Core
messages: 373796
nosy: th
priority: normal
severity: normal
status: open
title: Better error message of "Cannot recover from stack overflow."
type: enhancement
versions: Python 3.10
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[issue41318] Better error message of "Cannot recover from stack overflow."
Change by Heyi Tang : -- versions: +Python 3.8 -Python 3.10 ___ Python tracker <https://bugs.python.org/issue41318> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue41318] Better error message of "Cannot recover from stack overflow."
Change by Heyi Tang : -- type: enhancement -> behavior ___ Python tracker <https://bugs.python.org/issue41318> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue41318] Better error message of "Cannot recover from stack overflow."
Change by Heyi Tang : -- versions: +Python 3.10, Python 3.5, Python 3.6, Python 3.7, Python 3.9 ___ Python tracker <https://bugs.python.org/issue41318> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue41318] Better error message of "Cannot recover from stack overflow."
Change by Heyi Tang : -- keywords: +patch pull_requests: +20798 stage: -> patch review pull_request: https://github.com/python/cpython/pull/21655 ___ Python tracker <https://bugs.python.org/issue41318> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
