[INFO] updating cached repository https://github.com/servo/servo
[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/servo
[INFO] [stderr]  - [deleted]               (none)     -> reftest-report
[INFO] [stderr]  + 535a00bc0d...75fce11335 auto               -> auto  (forced update)
[INFO] [stderr]  + 70f2eadcfd...4bddac9d35 canvas-background2 -> canvas-background2  (forced update)
[INFO] [stderr]    5ee1a48d82..75fce11335  master             -> master
[INFO] [stderr]  + 80bffd0687...1c2c3dfeba try-wpt            -> try-wpt  (forced update)
[INFO] [stderr]  + b73c92c272...ce9c20f89f try-wpt-2020       -> try-wpt-2020  (forced update)
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 75fce11335f5053d93651c28377764ae37b9acff
[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.