Bug report

In the following part of pegen, the memoized result is only used if self._should_memoize(node) is true. Since loop rules are autogenerated, they are not marked with (memo), so this is always false. Despite that, in the end the result is memoized based on the different condition if node.name. Because of that, in the generated parser loop rules' results are always stored in the cache, but never accessed later.

Your environment

Does not matter - discovered through manual code analysis

Linked PRs

• gh-102416: Do not memoize incorrectly loop rules in the parser #102467
• [3.11] gh-102416: Do not memoize incorrectly loop rules in the parser (GH-102467). #102473
• [3.10] gh-102416: Do not memoize incorrectly loop rules in the parser (GH-102467). #102474