[INFO] updating cached repository xlnx/rusty-frontend
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/xlnx/rusty-frontend
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/xlnx/rusty-frontend" "work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/xlnx/rusty-frontend"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/gh/xlnx/rusty-frontend'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/xlnx/rusty-frontend" "work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/xlnx/rusty-frontend"`
[INFO] [stderr] Cloning into 'work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/gh/xlnx/rusty-frontend'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 263478a17f7a12555c116c230ed60d88906c8507
[INFO] sha for GitHub repo xlnx/rusty-frontend: 263478a17f7a12555c116c230ed60d88906c8507
[INFO] validating manifest of xlnx/rusty-frontend on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml for xlnx/rusty-frontend
[ERROR]