Rollup of 5 pull requests#149706

Closed

jhpratt wants to merge 12 commits intorust-lang:mainfrom

jhpratt:rollup-vgu8yju

Commits on Sep 20, 2025

Implement `Allocator` for `&mut A` where `A: Allocator + ?Sized`
bluurryy
committed

Commits on Nov 4, 2025

add Option::into_flat_iter
Qelxiros
committed

Commits on Dec 5, 2025

Fix armv8r-none-eabihf tier
korken89
committed