[INFO] cloning repository https://github.com/erumachi/col-interpreter-from-scratch
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erumachi/col-interpreter-from-scratch" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferumachi%2Fcol-interpreter-from-scratch", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferumachi%2Fcol-interpreter-from-scratch'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0ad2377bd2a7f855b9bc7b1346d7752cb70dedb9
[INFO] checking erumachi/col-interpreter-from-scratch against master#c5fbcd35a8217a17f6b63a22217ace06cf8f5f02 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferumachi%2Fcol-interpreter-from-scratch" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erumachi/col-interpreter-from-scratch on toolchain c5fbcd35a8217a17f6b63a22217ace06cf8f5f02
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/erumachi/col-interpreter-from-scratch
[INFO] finished tweaking git repo https://github.com/erumachi/col-interpreter-from-scratch
[INFO] tweaked toml for git repo https://github.com/erumachi/col-interpreter-from-scratch written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/erumachi/col-interpreter-from-scratch already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a1a3810e1ddd4361029223bb35f76d13389d3284119fa1b28323069f0b0ccb4b
[INFO] running `Command { std: "docker" "start" "-a" "a1a3810e1ddd4361029223bb35f76d13389d3284119fa1b28323069f0b0ccb4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a1a3810e1ddd4361029223bb35f76d13389d3284119fa1b28323069f0b0ccb4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a1a3810e1ddd4361029223bb35f76d13389d3284119fa1b28323069f0b0ccb4b", kill_on_drop: false }`
[INFO] [stdout] a1a3810e1ddd4361029223bb35f76d13389d3284119fa1b28323069f0b0ccb4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e1baa4826842b44ba9460455dc238ba00e335d034733aadecee7314a25e92cc
[INFO] running `Command { std: "docker" "start" "-a" "2e1baa4826842b44ba9460455dc238ba00e335d034733aadecee7314a25e92cc", kill_on_drop: false }`
[INFO] [stderr]     Checking col-interpreter-from-scratch v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `swap`
[INFO] [stdout]   --> src/stack.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn swap(&mut self, a: usize, b: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/stack.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn remove(&mut self, idx: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `swap`
[INFO] [stdout]   --> src/stack.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn swap(&mut self, a: usize, b: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/stack.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn remove(&mut self, idx: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/stack.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn length(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `swap`
[INFO] [stdout]   --> src/stack.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn swap(&mut self, a: usize, b: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/stack.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn remove(&mut self, idx: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `length`
[INFO] [stdout]   --> src/stack.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn length(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `swap`
[INFO] [stdout]   --> src/stack.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn swap(&mut self, a: usize, b: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/stack.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn remove(&mut self, idx: usize) -> Result<(), String> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "2e1baa4826842b44ba9460455dc238ba00e335d034733aadecee7314a25e92cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e1baa4826842b44ba9460455dc238ba00e335d034733aadecee7314a25e92cc", kill_on_drop: false }`
[INFO] [stdout] 2e1baa4826842b44ba9460455dc238ba00e335d034733aadecee7314a25e92cc