[INFO] updating cached repository https://github.com/artichoke/playground
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/artichoke/playground
[INFO] [stderr]  - [deleted]         (none)     -> stable-rust
[INFO] [stderr]    c242eaf..c9cc201  gh-pages   -> gh-pages
[INFO] [stderr]    4197dd9..a9b72c0  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a9b72c06524cfd55f7da66b990d969333e609836
[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.