static-cell: Change unsafe Sync impl for ClaimOnceCell - #2667
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The previous impl was insufficiently broad, and did not allow for types like `core::cell::Cell` to be placed in the ClaimOnceCell. I believe the impl was copied from StaticCell, which needs to have a more restrictive implementation as the user is not given a full `&mut T`.
hawkw
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The previous impl was insufficiently broad, and did not allow for types like `core::cell::Cell` to be placed in the ClaimOnceCell. I believe the impl was copied from StaticCell, which needs to have a more restrictive implementation as the user is not given a full `&mut T`.
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The previous impl was insufficiently broad, and did not allow for types like
core::cell::Cellto be placed in the ClaimOnceCell. I believe the impl was copied from StaticCell, which needs to have a more restrictive implementation as the user is not given a full&mut T.