[issue31113] Stack overflow with large program

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Updated patch makes stackdepth() not consuming the C stack for recursion. The new code is not strictly equivalent to the old code, but I think they should produce the same results in common cases (the existing stack depth calculation algorithm is not free from bugs, see issue24340).

Since this change is not trivial, I think it should be made it only in master. In maintained versions it is safer to change build options on Windows to produce the executable with larger stack.

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stage:  -> patch review
versions: +Python 3.7 -Python 3.6

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