[INFO] cloning repository https://github.com/k1ut3h/linked-list-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/k1ut3h/linked-list-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk1ut3h%2Flinked-list-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk1ut3h%2Flinked-list-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c7b744e12c40c86d363d09e24d4cc0fdbc2681a3
[INFO] checking k1ut3h/linked-list-rust against e977a0b5ab976a591981e7263bd67a71a4f79308 for pr-158914
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fk1ut3h%2Flinked-list-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/k1ut3h/linked-list-rust
[INFO] finished tweaking git repo https://github.com/k1ut3h/linked-list-rust
[INFO] tweaked toml for git repo https://github.com/k1ut3h/linked-list-rust written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/k1ut3h/linked-list-rust on toolchain e977a0b5ab976a591981e7263bd67a71a4f79308
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e977a0b5ab976a591981e7263bd67a71a4f79308" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/k1ut3h/linked-list-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" "+e977a0b5ab976a591981e7263bd67a71a4f79308" "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-3-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1fa6594d87c8fa7b311925a7a77a16f539833322d9dfba4ce891f211db2f90b1" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78
[INFO] running `Command { std: "docker" "start" "092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78" "/opt/rustwide/cargo-home/bin/cargo" "+e977a0b5ab976a591981e7263bd67a71a4f79308" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78" "/opt/rustwide/cargo-home/bin/cargo" "+e977a0b5ab976a591981e7263bd67a71a4f79308" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking linked_list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `val` is never read
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct LinkedList{
[INFO] [stdout]   |        ---------- field in this struct
[INFO] [stdout] 3 |     val: i32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `LinkedList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl LinkedList{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn print(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `val` is never read
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct LinkedList{
[INFO] [stdout]   |        ---------- field in this struct
[INFO] [stdout] 3 |     val: i32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `LinkedList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]   --> src/main.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout]  7 | impl LinkedList{
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn print(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78", kill_on_drop: false }`
[INFO] [stdout] 092d90f03cae172ec633ece1b0d65ef9d90602937916eb8c7ec83ac1bb787f78
