Compiler RecursionError more likely to occur in 3.13

Bug report

Bug description:

Reference: https://github.com/sympy/sympy/issues/26692

There's a long expression in sympy that's causing a RecursionError in ast.c. The source of the RecursionError is https://github.com/python/cpython/blob/ffc8e21c80627c46be7a7467ee5427924fdeb885/Python/ast.c#L217.

This seems to happen with a 3.13 debug build due to a lower recursion limit. The error doesn't happen in 3.13 release.

Interestingly, the error doesn't happen in the 3.12 debug build, even though the recursion limit appears to be the same. This leads me to believe that 3.13 is causing more recursive calls than expected. I think we should investigate why 3.13 is making additional calls and/or raise the recursion limit.

Simple repro:

import ast
contents = "x = " + " * ".join(["1"] * 2000)
result = ast.parse(contents)

On 3.12 debug, this code runs fine. On 3.13 debug, this code causes a RecursionError even when we change 2000 to 500 (leading me to believe that it is not the case that 3.13 is just adding a constant number of additional calls).

CPython versions tested on:

3.12, 3.13

Operating systems tested on:

Linux

まず、3.12 と 3.13 の debug ビルドで ast.parse を使って式を再現し、その後、報告された 217 行目付近の再帰チェックにある Python/ast.c を調べます。3.13 が追加の再帰呼び出しを行う理由、または再帰制限が不適切かどうかを特定します。回帰が解消され、提供された再現例がもはや失敗しないことを検証できれば完了です。