[INFO] cloning repository https://github.com/saurabh7517/hello_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/saurabh7517/hello_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabh7517%2Fhello_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabh7517%2Fhello_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 91f8d5ac322f526440541cc6c11a9b68144401a1
[INFO] checking saurabh7517/hello_rust against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsaurabh7517%2Fhello_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/saurabh7517/hello_rust
[INFO] finished tweaking git repo https://github.com/saurabh7517/hello_rust
[INFO] tweaked toml for git repo https://github.com/saurabh7517/hello_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/saurabh7517/hello_rust on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/saurabh7517/hello_rust 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded csv-core v0.1.10
[INFO] [stderr]   Downloaded regex-automata v0.1.9
[INFO] [stderr]   Downloaded csv v1.1.5
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7757e745e6185e7b85e31108883e27964b4e1a950d97fb96814e20a6a09af698
[INFO] running `Command { std: "docker" "start" "-a" "7757e745e6185e7b85e31108883e27964b4e1a950d97fb96814e20a6a09af698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7757e745e6185e7b85e31108883e27964b4e1a950d97fb96814e20a6a09af698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7757e745e6185e7b85e31108883e27964b4e1a950d97fb96814e20a6a09af698", kill_on_drop: false }`
[INFO] [stdout] 7757e745e6185e7b85e31108883e27964b4e1a950d97fb96814e20a6a09af698
[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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 759eb6422ee6c5287915ceb5a37586098c80aaac93b009730d372bfa9f309b1c
[INFO] running `Command { std: "docker" "start" "-a" "759eb6422ee6c5287915ceb5a37586098c80aaac93b009730d372bfa9f309b1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking school v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `grade_list` is never read
[INFO] [stdout]    --> src/main.rs:162:5
[INFO] [stdout]     |
[INFO] [stdout] 160 | struct GenderMap<'a> {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 161 |     gender: String,
[INFO] [stdout] 162 |     grade_list: Vec<GradeMap<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `student_list` is never read
[INFO] [stdout]    --> src/main.rs:173:5
[INFO] [stdout]     |
[INFO] [stdout] 171 | struct GradeMap<'a> {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 172 |     grade: String,
[INFO] [stdout] 173 |     student_list: Vec<&'a Student>,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `grade_list` is never read
[INFO] [stdout]    --> src/main.rs:162:5
[INFO] [stdout]     |
[INFO] [stdout] 160 | struct GenderMap<'a> {
[INFO] [stdout]     |        --------- field in this struct
[INFO] [stdout] 161 |     gender: String,
[INFO] [stdout] 162 |     grade_list: Vec<GradeMap<'a>>,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `student_list` is never read
[INFO] [stdout]    --> src/main.rs:173:5
[INFO] [stdout]     |
[INFO] [stdout] 171 | struct GradeMap<'a> {
[INFO] [stdout]     |        -------- field in this struct
[INFO] [stdout] 172 |     grade: String,
[INFO] [stdout] 173 |     student_list: Vec<&'a Student>,
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.46s
[INFO] running `Command { std: "docker" "inspect" "759eb6422ee6c5287915ceb5a37586098c80aaac93b009730d372bfa9f309b1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "759eb6422ee6c5287915ceb5a37586098c80aaac93b009730d372bfa9f309b1c", kill_on_drop: false }`
[INFO] [stdout] 759eb6422ee6c5287915ceb5a37586098c80aaac93b009730d372bfa9f309b1c