[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)     -> minimal
[INFO] [stderr]  - [deleted]               (none)     -> rustup
[INFO] [stderr]    5011e9c21c..e26530341b  auto            -> auto
[INFO] [stderr]    882dcc8408..30c588ddac  master          -> master
[INFO] [stderr]  + 9092f16467...df14c5d74d rand            -> rand  (forced update)
[INFO] [stderr]  + 7c7c16bb90...9a3cc1b5fb try             -> try  (forced update)
[INFO] [stderr]  + e7ae178d5c...be2f7f5f36 try-taskcluster -> try-taskcluster  (forced update)
[INFO] [stderr]  + 684c74ffdd...4eb752f71b try-windows     -> try-windows  (forced update)
[INFO] [stderr]  + d4d826847d...c5375147f4 try-wpt         -> try-wpt  (forced update)
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 30c588ddacbef2db59c771eae04a95093e9b2837
[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.