[INFO] updating cached repository yszk0123-sandbox/hello_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yszk0123-sandbox/hello_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yszk0123-sandbox/hello_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/yszk0123-sandbox/hello_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/yszk0123-sandbox/hello_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yszk0123-sandbox/hello_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yszk0123-sandbox/hello_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yszk0123-sandbox/hello_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 08a1f913856e2a0fd7f8db08d0bc51a3b556e1c3
[INFO] sha for GitHub repo yszk0123-sandbox/hello_rust: 08a1f913856e2a0fd7f8db08d0bc51a3b556e1c3
[INFO] validating manifest of yszk0123-sandbox/hello_rust on toolchain 1.37.0
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml for yszk0123-sandbox/hello_rust
[ERROR]