[INFO] updating cached repository Grize/sandbox
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Grize/sandbox
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Grize/sandbox" "work/ex/beta-1.38-1/sources/1.37.0/gh/Grize/sandbox"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Grize/sandbox'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Grize/sandbox" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Grize/sandbox"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Grize/sandbox'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c0f658d80f9a41b86d5ab9c626b5ed1bf1d67aa8
[INFO] sha for GitHub repo Grize/sandbox: c0f658d80f9a41b86d5ab9c626b5ed1bf1d67aa8
[INFO] validating manifest of Grize/sandbox 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 Grize/sandbox
[ERROR]