Rollup of 7 pull requests - #71920

Closed

Dylan-DPC-zz wants to merge 18 commits into

rust-lang:masterfrom

Dylan-DPC-zz:rollup-j37hv0x

Commits on Apr 24, 2020

Introduce BTreeMap benches of iter itself
ssomers
committed
8f5c66c
Speed up BTreeMap iteration by intertwined descend to the initial leaf edges
ssomers
committed
8730227

Commits on May 1, 2020

Turn of rustc-dev-guide toolstate for now
mark-i-m
committed
9e43b00

Commits on May 2, 2020

SipHasher::new() is literally with SipHasher with both keys being 0
hbina
committed
19e5da9

Commits on May 3, 2020

x.py: Give a more helpful error message if curl isn't installed
jyn514
committed
9bcf409

Commits on May 4, 2020

Commits on May 5, 2020