[INFO] cloning repository https://github.com/Ted1166/guessing-game-contract
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ted1166/guessing-game-contract" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTed1166%2Fguessing-game-contract", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTed1166%2Fguessing-game-contract'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a8efe1a5a5dfc55fbe500a0bcdbda4a53996b2e
[INFO] checking Ted1166/guessing-game-contract against c397dae808f70caebab1fc4e11b3edf7e59f58c7 for pr-158759-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTed1166%2Fguessing-game-contract" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Ted1166/guessing-game-contract
[INFO] finished tweaking git repo https://github.com/Ted1166/guessing-game-contract
[INFO] tweaked toml for git repo https://github.com/Ted1166/guessing-game-contract written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Ted1166/guessing-game-contract on toolchain c397dae808f70caebab1fc4e11b3edf7e59f58c7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Ted1166/guessing-game-contract already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c397dae808f70caebab1fc4e11b3edf7e59f58c7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: failed to read file: /workspace/builds/worker-3-tc1/source/Cargo.lock
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   stream did not contain valid UTF-8


overridden task result to prepare-fail:unknown

Caused by:
    0: uncategorized prepare error
    1: command failed: exit status: 101
       
       error: failed to read file: /workspace/builds/worker-3-tc1/source/Cargo.lock
       
       Caused by:
         stream did not contain valid UTF-8