Rollup of 16 pull requests#81523

Closed

jonas-schievink wants to merge 40 commits intorust-lang:masterfrom

jonas-schievink:rollup-k8pckqx

Commits on Jan 13, 2021

Commits on Jan 22, 2021

Add `core::stream::Stream`
yoshuawuyts
committed

Commits on Jan 23, 2021

Make functional record update/struct update syntax works inside closures when feature capture_disjoint_fields is enabled
null-sleep
committed
Remove `Stream::next`
yoshuawuyts
committed

Commits on Jan 25, 2021

BTreeMap: correct tests for alternative choices of B
ssomers
committed

Commits on Jan 29, 2021