Windows: hangs in workspace_root()

[liigo]

cargo run always hangs in workspace_root().
to be clear, it hangs in the first line of that function:

fn workspace_root() -> String {
    let output = Command::new("cargo").args(&["metadata", "--format-version", "1"]).output();
    ...
}

After runing cargo metadata --format-version 1 manually, it runs well.

cargo metadata --format-version 1
 Downloading winapi-i686-pc-windows-gnu v0.4.0
{"packages":[{"name":"cargo-src","version":"0.1.0","id":"cargo-src 0.1.0 ...

cargo run

my rustc:

rustc -Vv
rustc 1.27.0-nightly (ac3c2288f 2018-04-18)
binary: rustc
commit-hash: ac3c2288f9f9d977acb46406ba60033d65165a7b
commit-date: 2018-04-18
host: x86_64-pc-windows-msvc
release: 1.27.0-nightly
LLVM version: 6.0

[ErichDonGubler]

I'm not getting this behavior on either of my Windows 10 machines. @liigo, do you have more environment info about the box you're reproducing this on?

[liigo]

no more info, sorry!