Rollup of 8 pull requests#91019

Merged

bors merged 20 commits intorust-lang:masterfrom

JohnTitor:rollup-q95ra7r

Nov 18, 2021

Commits on Nov 1, 2021

mention `remove` in `swap_remove`
r00ster91
committed

Commits on Nov 12, 2021

Add `-Zassert-incr-state` to assert state of incremental cache
pierwill
committed

Commits on Nov 14, 2021

require full validity when determining the discriminant of a value
RalfJung
committed

Commits on Nov 17, 2021

Make slice->str conversion and related functions const
WaffleLapkin
committed

Commits on Nov 18, 2021