What does `unsafe` mean?

[HadrienG]

I feel obliged to quote my last attempt at attacking this problem if we're reaching that point.

[Pre-RFC] Another take at clarifying `unsafe` semantics

List of major changes since this was first published: 2018-03-14 @ 22:06 CET – Integrated feedback from @mark-i-m and @eternaleye 2018-03-15 @ 21:37 CET – Integrated some of the feedback from @CAD97. The many meanings of the “unsafe” keyword in Rust unncessarily reduce its ergonomics and learnability. That point is regularly brought up, two recent examples on this forum being “Ambiguity of “unsafe” causes confusion in understanding” and “What does unsafe mean”. Other threads of discussion a…

I got exhausted from arguing with obviously unconvinced people at the end, so the top post is not fully up-to-date w.r.t the final state of the discussion. There were in particular some interesting points about unsafe values at the end which got close to what you are currently discussing.