[INFO] updating cached repository polunzh/rust-demo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/polunzh/rust-demo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/polunzh/rust-demo" "work/ex/beta-1.38-1/sources/1.37.0/gh/polunzh/rust-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/polunzh/rust-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/polunzh/rust-demo" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polunzh/rust-demo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/polunzh/rust-demo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 21e3bd366cb3d0fc9a0bca59fef1d5b696f1b7bb
[INFO] sha for GitHub repo polunzh/rust-demo: 21e3bd366cb3d0fc9a0bca59fef1d5b696f1b7bb
[INFO] validating manifest of polunzh/rust-demo on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: invalid syntax in polunzh/rust-demo's Cargo.toml
[ERROR] caused by: command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` failed
[ERROR]