Rollup of 7 pull requests#86891

Merged

bors merged 23 commits intorust-lang:masterfrom

JohnTitor:rollup-gy2gan9

Jul 5, 2021

Commits on May 22, 2021

Add std::os::unix::fs::DirEntryExt2::file_name_ref(&self) -> &OsStr
arennow
committed

Commits on Jun 28, 2021

double-check mutability inside Allocation
RalfJung
committed

Commits on Jun 30, 2021

Commits on Jul 1, 2021

Stabilize `Seek::rewind`
inquisitivecrystal
committed

Commits on Jul 5, 2021