Build error on rust nightly: missing README.md

[kigawas]

 Downloading crates ...
  Downloaded arrayref v0.3.6
  Downloaded autocfg v1.0.0
  Downloaded base64 v0.12.1
  Downloaded byte-tools v0.3.1
  Downloaded block-padding v0.1.5
  Downloaded block-buffer v0.8.0
  Downloaded byteorder v1.3.4
  Downloaded block-buffer v0.7.3
  Downloaded hyper v0.13.6
error: failed to parse manifest at `/home/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/hyper-0.13.6/Cargo.toml`

Caused by:
  readme file with name 'README.md' was not found
##[error]Process completed with exit code 101.

[taiki-e]

This is cargo bug: rust-lang/cargo#8351 (The workaround is to install previous nightly)

[seanmonstar]

It's been fixed upstream.