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[pointer] Update requirements for zero-sized types #1614

Merged
merged 1 commit into from
Sep 7, 2024
Merged

[pointer] Update requirements for zero-sized types #1614

merged 1 commit into from
Sep 7, 2024

Commits on Sep 7, 2024

  1. [pointer] Update requirements for zero-sized types 

    Now that [1] is completed, zero-sized accesses no longer require
provenance. Per [2], zero-sized references are no longer required to be
dereferenceable, and so may not carry provenance.

This commit updates `Ptr`'s invariants to not require provenance or a
valid allocation when its referent is zero-sized.

[1] rust-lang/rust#117945
[2] rust-lang/rust#125021

Closes #874
    @joshlf
    joshlf committed Sep 7, 2024
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