legacy_tracing.c: Unchecked PyLong_AsInt in tracing callbacks

Bug report

Bug description:

Original gist: https://gist.github.com/devdanzin/d1a6ab9f62970be0cae139366ce3c482

Summary

sys_trace_jump_func (line 382-384) and sys_trace_line_func (line 355): PyLong_AsInt error return -1 not checked. Proceeds with wrong values and pending exception.

Fix

Add if (result == -1 && PyErr_Occurred()) return NULL; checks.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

• gh-153623

阅读 legacy_tracing.c 中的 sys_trace_line_func 和 sys_trace_jump_func，重点关注第 355 行和第 382-384 行所指出的 PyLong_AsInt 调用。确认两个回调都能处理转换错误，而不会继续使用无效值，也不会留下待处理的异常。该 issue 已经关联到 PR gh-153623，因此请在开始之前检查这项工作。