Revert "Stabilize `-Znext-solver=coherence`" This is a clean revert of #121848, prepared by running: ``` $ git revert 17b322fa69 -m1 ``` Which effectively reverts: * a138a92615, 69fdd1457d, d93e047c9f, 1a893ac648 see: https://rust-lang.zulipchat.com/#narrow/stream/364551-t-types.2Ftrait-system-refactor/topic/nalgebra.20hang Closes #130056 r? lcnr
17b322fa69
a138a92615
69fdd1457d
d93e047c9f
1a893ac648
*
!Sized
-> Box<dyn Trait>
-> impl Trait