[INFO] updating cached repository servo/webrender
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/servo/webrender
[INFO] [stderr]  * branch              HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/servo/webrender" "work/ex/beta-1.38-1/sources/1.37.0/gh/servo/webrender"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/servo/webrender'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/servo/webrender" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/servo/webrender"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/servo/webrender'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c24c0541079ab79342725476d2554e819eb80934
[INFO] sha for GitHub repo servo/webrender: c24c0541079ab79342725476d2554e819eb80934
[INFO] validating manifest of servo/webrender 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 servo/webrender'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]