{
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  "path": "/t/idea-pre-rfc-null-free-pointer-and-zeroable-reference/23991?page=6#post_110",
  "publishedAt": "2026-03-08T08:28:53.000Z",
  "site": "https://internals.rust-lang.org",
  "textContent": "Thank you for the thoughtful contribution. After reviewing your suggestion, I find the pattern of treating 0x0 as valid when no niche-dependent pattern is present to be elegant, and the analogy to async effects is an interesting direction worth exploring further. That said, I'm also concerned that static detection could miss niche dependencies in certain cases (e.g. FFI), introducing UB, and that the compiler complexity would increase considerably. The zeroable reference primitive in the current proposal is designed as a more conservative path that minimises these concerns - but if the concerns around static detection and FFI coverage can be addressed, I think this could be a compelling approach.",
  "title": "Idea / Pre-RFC: Null-free pointer and Zeroable reference"
}