[INFO] cloning repository https://github.com/shizde/ruffman
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shizde/ruffman" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshizde%2Fruffman", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshizde%2Fruffman'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70e78bf3c9a5d53b5aa7ebe86b3f2d25e7ab6e9e
[INFO] testing shizde/ruffman against 1.83.0 for beta-1.84.0-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshizde%2Fruffman" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shizde/ruffman on toolchain 1.83.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shizde/ruffman
[INFO] finished tweaking git repo https://github.com/shizde/ruffman
[INFO] tweaked toml for git repo https://github.com/shizde/ruffman written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/shizde/ruffman 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" "+1.83.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dff227419651ce6f74acbbd2c86c21116c7009a4efdfa09c042ffb301f64bdd4
[INFO] running `Command { std: "docker" "start" "-a" "dff227419651ce6f74acbbd2c86c21116c7009a4efdfa09c042ffb301f64bdd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dff227419651ce6f74acbbd2c86c21116c7009a4efdfa09c042ffb301f64bdd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dff227419651ce6f74acbbd2c86c21116c7009a4efdfa09c042ffb301f64bdd4", kill_on_drop: false }`
[INFO] [stdout] dff227419651ce6f74acbbd2c86c21116c7009a4efdfa09c042ffb301f64bdd4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee2a2a1bf8dc618fe5d97c9e1b7269397697146999fcecb871146c766a49c379
[INFO] running `Command { std: "docker" "start" "-a" "ee2a2a1bf8dc618fe5d97c9e1b7269397697146999fcecb871146c766a49c379", kill_on_drop: false }`
[INFO] [stderr]    Compiling ruffman v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serde_json`
[INFO] [stdout]    --> src/main.rs:104:23
[INFO] [stdout]     |
[INFO] [stdout] 104 |     writer.write_all(&serde_json::to_vec(&codes).unwrap())?;
[INFO] [stdout]     |                       ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared crate or module `serde_json`
[INFO] [stdout]    --> src/main.rs:121:38
[INFO] [stdout]     |
[INFO] [stdout] 121 |     let codes: HashMap<String, u8> = serde_json::from_slice(&compressed_data[..compressed_data.len() - 8]).unwrap();
[INFO] [stdout]     |                                      ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ruffman` (bin "ruffman") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ee2a2a1bf8dc618fe5d97c9e1b7269397697146999fcecb871146c766a49c379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee2a2a1bf8dc618fe5d97c9e1b7269397697146999fcecb871146c766a49c379", kill_on_drop: false }`
[INFO] [stdout] ee2a2a1bf8dc618fe5d97c9e1b7269397697146999fcecb871146c766a49c379