Rollup of 8 pull requests#78176

Closed

JohnTitor wants to merge 29 commits intorust-lang:masterfrom

JohnTitor:rollup-i4bhfly

Commits on Oct 8, 2020

Commits on Oct 12, 2020

Commits on Oct 13, 2020

Reword safety guarantee of Pin::static_{ref,mut}.

m-ou-se
and
petertodd
committed

Commits on Oct 15, 2020

Add missing `mut`.

m-ou-se
and
dtolnay
authored

Commits on Oct 16, 2020

Haiku: explicitly set CMAKE_SYSTEM_NAME when cross-compiling
nielx
committed

Commits on Oct 17, 2020

Commits on Oct 18, 2020

Commits on Oct 19, 2020

Commits on Oct 20, 2020

Apply some review suggestions
camelid
committed

Commits on Oct 21, 2020