[INFO] cloning repository https://github.com/jeffusan/rust_fun
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeffusan/rust_fun" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffusan%2Frust_fun", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffusan%2Frust_fun'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0db63d2afabccf1934eb3df46b5dc33064891761
[INFO] checking jeffusan/rust_fun against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffusan%2Frust_fun" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jeffusan/rust_fun
[INFO] finished tweaking git repo https://github.com/jeffusan/rust_fun
[INFO] tweaked toml for git repo https://github.com/jeffusan/rust_fun written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jeffusan/rust_fun on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jeffusan/rust_fun 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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1594b98fab5d885157eb3b7d37f6d948710bd77c513784947ccd5271fc057766
[INFO] running `Command { std: "docker" "start" "-a" "1594b98fab5d885157eb3b7d37f6d948710bd77c513784947ccd5271fc057766", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1594b98fab5d885157eb3b7d37f6d948710bd77c513784947ccd5271fc057766", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1594b98fab5d885157eb3b7d37f6d948710bd77c513784947ccd5271fc057766", kill_on_drop: false }`
[INFO] [stdout] 1594b98fab5d885157eb3b7d37f6d948710bd77c513784947ccd5271fc057766
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e11e5336e2abc4767dc12d1c6b59d74d64cd1828e2d327ca9611a492d787c483
[INFO] running `Command { std: "docker" "start" "-a" "e11e5336e2abc4767dc12d1c6b59d74d64cd1828e2d327ca9611a492d787c483", kill_on_drop: false }`
[INFO] [stderr]     Checking hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Stack` is never constructed
[INFO] [stdout]  --> src/main.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub struct Stack {
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push`, `pop`, and `max` are never used
[INFO] [stdout]   --> src/main.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 14 |     impl Stack {
[INFO] [stdout]    |     ---------- associated items in this implementation
[INFO] [stdout] 15 |
[INFO] [stdout] 16 |         pub fn new() -> Stack {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |         pub fn push(&mut self, item: i8) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |         pub fn pop(&mut self) -> Option<i8> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |         pub fn max(&self) -> i8 {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "e11e5336e2abc4767dc12d1c6b59d74d64cd1828e2d327ca9611a492d787c483", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e11e5336e2abc4767dc12d1c6b59d74d64cd1828e2d327ca9611a492d787c483", kill_on_drop: false }`
[INFO] [stdout] e11e5336e2abc4767dc12d1c6b59d74d64cd1828e2d327ca9611a492d787c483
