Rollup of 8 pull requests#81510

Closed

henryboisdequin wants to merge 25 commits into

rust-lang:masterfrom

henryboisdequin:rollup-ap65xne

Commits on Jan 22, 2021

Don't link with --export-dynamic on wasm32-wasi
sunfishcode
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

Commits on Jan 24, 2021

combine: stop eagerly evaluating consts
lcnr
committed

Commits on Jan 25, 2021

BTreeMap: correct tests for alternative choices of B
ssomers
committed

Commits on Jan 29, 2021