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Kirill Smelkov authored
https://docs.python.org/3/whatsnew/3.11.html says to use PyFrame_GetBack() instead of direct ->f_back access which indeed starts to create frames on the fly in py3.11 if ->f_back was NULL: https://github.com/python/cpython/commit/ae0a2b756255 https://github.com/python/cpython/commit/68f5fa668343 -> change all usage of ->f_back to that function not to skip yet-unmaterialized frames while doing our checks. /reviewed-by @jerome /reviewed-on !37
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