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bpo-42500: Fix recursion in or after except (GH-23568) (#24501)

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* Use counter, rather boolean state when handling soft overflows.

(cherry picked from commit 4e7a69bdb6)
This commit is contained in:
Mark Shannon 2021-03-02 10:36:38 +00:00 • committed by GitHub
parent f836e5f219
commit 8b795ab554
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9 changed files with 76 additions and 75 deletions
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Python/sysmodule.c
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@ -1160,7 +1160,6 @@ static PyObject *
sys_setrecursionlimit_impl(PyObject *module, int new_limit)
/*[clinic end generated code: output=35e1c64754800ace input=b0f7a23393924af3]*/
{
int mark;
PyThreadState *tstate = _PyThreadState_GET();
if (new_limit < 1) {
@ -1178,8 +1177,7 @@ sys_setrecursionlimit_impl(PyObject *module, int new_limit)
Reject too low new limit if the current recursion depth is higher than
the new low-water mark. Otherwise it may not be possible anymore to
reset the overflowed flag to 0. */
mark = _Py_RecursionLimitLowerWaterMark(new_limit);
if (tstate->recursion_depth >= mark) {
if (tstate->recursion_depth >= new_limit) {
_PyErr_Format(tstate, PyExc_RecursionError,
"cannot set the recursion limit to %i at "
"the recursion depth %i: the limit is too low",