[INFO] cloning repository https://github.com/uu4k/rust_book_sample_code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/uu4k/rust_book_sample_code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuu4k%2Frust_book_sample_code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuu4k%2Frust_book_sample_code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac88d60a953fc080e70291d0f319b986c707bba8
[INFO] checking uu4k/rust_book_sample_code against master#5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea for pr-124336
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuu4k%2Frust_book_sample_code" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/uu4k/rust_book_sample_code on toolchain 5557f8c9d08d7f3f680943dcf97b6d4a7eb13aea
[ERROR] this task or one of its parent failed!
[ERROR] overridden task result to broken:cargo-toml
[ERROR] caused by: missing Cargo.toml
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.