The previous mem::unitialized method was deprecated in favour of this
struct which carries information about the initialisation state
forward to the compiler.
Change-Id: Ib5f5d1ad91f9957b18eebabc1048f8649bc74049
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5225
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>