[INFO] cloning repository https://github.com/dewmal/my-rust-steps
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dewmal/my-rust-steps" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdewmal%2Fmy-rust-steps", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdewmal%2Fmy-rust-steps'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 22711fe3e1eddf159591e8bc588bd436faba3094
[INFO] checking dewmal/my-rust-steps against try#4797991aa2efb6d658150f10425b3f3b5d10eceb for pr-143193
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdewmal%2Fmy-rust-steps" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dewmal/my-rust-steps
[INFO] finished tweaking git repo https://github.com/dewmal/my-rust-steps
[INFO] tweaked toml for git repo https://github.com/dewmal/my-rust-steps written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dewmal/my-rust-steps on toolchain 4797991aa2efb6d658150f10425b3f3b5d10eceb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4797991aa2efb6d658150f10425b3f3b5d10eceb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dewmal/my-rust-steps 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" "+4797991aa2efb6d658150f10425b3f3b5d10eceb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+4797991aa2efb6d658150f10425b3f3b5d10eceb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58970e031d03d5d109c3b9a57ea26a4135eb8d49031cfb6081dede5de3ff023a
[INFO] running `Command { std: "docker" "start" "-a" "58970e031d03d5d109c3b9a57ea26a4135eb8d49031cfb6081dede5de3ff023a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58970e031d03d5d109c3b9a57ea26a4135eb8d49031cfb6081dede5de3ff023a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58970e031d03d5d109c3b9a57ea26a4135eb8d49031cfb6081dede5de3ff023a", kill_on_drop: false }`
[INFO] [stdout] 58970e031d03d5d109c3b9a57ea26a4135eb8d49031cfb6081dede5de3ff023a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+4797991aa2efb6d658150f10425b3f3b5d10eceb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bbcb85a6116fe6bd2ffb9492a30d41ef5c289cc0c8226a0d6cb63bd6e82dfc8f
[INFO] running `Command { std: "docker" "start" "-a" "bbcb85a6116fe6bd2ffb9492a30d41ef5c289cc0c8226a0d6cb63bd6e82dfc8f", kill_on_drop: false }`
[INFO] [stderr]     Checking StudentManagmentSystem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]    --> src/main.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let file = match std::fs::File::open("batch_details.txt") {
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `file`
[INFO] [stdout]    --> src/main.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let file = match std::fs::File::open("batch_details.txt") {
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_file`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_batch` is never used
[INFO] [stdout]    --> src/main.rs:192:4
[INFO] [stdout]     |
[INFO] [stdout] 192 | fn add_batch(batch_details: &mut Vec<Batch>) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_batch` is never used
[INFO] [stdout]    --> src/main.rs:192:4
[INFO] [stdout]     |
[INFO] [stdout] 192 | fn add_batch(batch_details: &mut Vec<Batch>) {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "bbcb85a6116fe6bd2ffb9492a30d41ef5c289cc0c8226a0d6cb63bd6e82dfc8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbcb85a6116fe6bd2ffb9492a30d41ef5c289cc0c8226a0d6cb63bd6e82dfc8f", kill_on_drop: false }`
[INFO] [stdout] bbcb85a6116fe6bd2ffb9492a30d41ef5c289cc0c8226a0d6cb63bd6e82dfc8f