[INFO] updating cached repository nhh/walle
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nhh/walle
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nhh/walle" "work/ex/beta-1.38-1/sources/1.37.0/gh/nhh/walle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nhh/walle'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nhh/walle" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nhh/walle"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nhh/walle'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 093cdf37f87779eed96290d404e7b71afbde0fe2
[INFO] sha for GitHub repo nhh/walle: 093cdf37f87779eed96290d404e7b71afbde0fe2
[INFO] validating manifest of nhh/walle 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 nhh/walle
[ERROR]