Fix race condition in local registry crate unpacking#6591

Merged

bors merged 3 commits intorust-lang:masterfrom

hugwijst:fix-race-local-registry

Jan 29, 2019

Commits on Jan 23, 2019

Fix race condition in local registry crate downloading.
hugwijst
committed

Commits on Jan 25, 2019

Lock unpacking instead of local registry tarball.
hugwijst
committed

Commits on Jan 28, 2019

First try opening the package source lock read-only.
hugwijst
committed