Design meeting: Unsafe fields RFC review

[scottmcm]

Summary

The RFC author believes this has reached a fixed-point and is deserving of lang review, rust-lang/rfcs#3458 (comment)

Seems worth discussing the overall scope of what we want this to accomplish. In particular, the intent of what we think should be unsafe seems worth a deep discussion.

About this issue

This issue corresponds to a lang-team design meeting proposal. It corresponds to a possible topic of discussion that may be scheduled for deeper discussion during one of our design meetings.

[traviscross]

In the planning meeting today, we scheduled this for the design meeting on 2025-09-17.