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chore(deps): update rust crate once_cell to v1.21.4#946

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chore(deps): update rust crate once_cell to v1.21.4#946
renovate[bot] wants to merge 1 commit intomainfrom
renovate/once_cell-1.x-lockfile

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@renovate renovate bot commented Mar 21, 2026

This PR contains the following updates:

Package Type Update Change
once_cell dependencies patch 1.21.31.21.4

Release Notes

matklad/once_cell (once_cell)

v1.21.4

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  • Fix unsoundness in OnceCell::wait under --features=parking_lot, #​295.

    If thread A calls wait, while thread B calls get_or_try_init(f), and, furthermore, f panics,
    the wait incorrectly returns and thread A observes uninitialized memory.

    Kudos to @​meng-xu-cs for a nice find!


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