Require `cargo install --vers` takes a semver version
authorAlex Crichton <alex@alexcrichton.com>
Mon, 28 Nov 2016 17:48:14 +0000 (09:48 -0800)
committerAlex Crichton <alex@alexcrichton.com>
Mon, 28 Nov 2016 17:48:14 +0000 (09:48 -0800)
commitd91c9b405777cb6a70dd6d0393511dd4917cfefd
tree461b4f410d17c7fd57b9de3353493deb9d566699
parent3568be94c0ca73488954ad209c07e7998786b3d9
Require `cargo install --vers` takes a semver version

Historically Cargo accidentally took a semver version *requirement*, so let's
start issuing warnings about how this is now legacy behavior.

Closes #3321
src/cargo/ops/cargo_install.rs
tests/install.rs