[INFO] updating cached repository wu1274704958/Rust_Test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wu1274704958/Rust_Test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wu1274704958/Rust_Test" "work/ex/beta-1.38-1/sources/1.37.0/gh/wu1274704958/Rust_Test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/wu1274704958/Rust_Test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wu1274704958/Rust_Test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wu1274704958/Rust_Test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/wu1274704958/Rust_Test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 92f2d945f2174b70bdb166328e7c7bc213b6f56b
[INFO] sha for GitHub repo wu1274704958/Rust_Test: 92f2d945f2174b70bdb166328e7c7bc213b6f56b
[INFO] validating manifest of wu1274704958/Rust_Test 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 wu1274704958/Rust_Test
[ERROR]