[INFO] updating cached repository https://github.com/servo/webrender
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/servo/webrender
[INFO] [stderr]  + 48db159f...cccb048e auto       -> auto  (forced update)
[INFO] [stderr]    66166116..cccb048e  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cccb048e11d7821263317ef19055dc2f43d634d6
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: invalid Cargo.toml syntax
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.