Rollup of 9 pull requests#57830

Merged

bors merged 21 commits intorust-lang:masterfrom

Jan 22, 2019

Commits on Jan 11, 2019

Add fmt benchmarks
sinkuu
committed

Commits on Jan 12, 2019

Commits on Jan 16, 2019

Fix memory leak in P::filter_map
ishitatsuyuki
committed

Commits on Jan 19, 2019

Make `str` indexing generic on `SliceIndex`.
Alexis Hunt
committed

Commits on Jan 20, 2019

Commits on Jan 21, 2019

Commits on Jan 22, 2019