[INFO] cloning repository https://github.com/kuy/opendatastructures-study
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kuy/opendatastructures-study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuy%2Fopendatastructures-study", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuy%2Fopendatastructures-study'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72dd45d4047f0daf4aef2bd04e6efa0abbd4214d
[INFO] checking kuy/opendatastructures-study against try#b98202ad067d72e45cec8be3d5c15d86ef0fd086 for pr-155193
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuy%2Fopendatastructures-study" "/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/kuy/opendatastructures-study
[INFO] finished tweaking git repo https://github.com/kuy/opendatastructures-study
[INFO] tweaked toml for git repo https://github.com/kuy/opendatastructures-study written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kuy/opendatastructures-study on toolchain b98202ad067d72e45cec8be3d5c15d86ef0fd086
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kuy/opendatastructures-study 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" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking kuy/opendatastructures-study against try#b98202ad067d72e45cec8be3d5c15d86ef0fd086 for pr-155193
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkuy%2Fopendatastructures-study" "/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/kuy/opendatastructures-study
[INFO] finished tweaking git repo https://github.com/kuy/opendatastructures-study
[INFO] tweaked toml for git repo https://github.com/kuy/opendatastructures-study written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kuy/opendatastructures-study on toolchain b98202ad067d72e45cec8be3d5c15d86ef0fd086
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kuy/opendatastructures-study 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" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c1723807cbaf4e4cbafd903bd4810d3c3c7dd2624e1046fd44b8bd1bcdd2470
[INFO] running `Command { std: "docker" "start" "-a" "7c1723807cbaf4e4cbafd903bd4810d3c3c7dd2624e1046fd44b8bd1bcdd2470", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c1723807cbaf4e4cbafd903bd4810d3c3c7dd2624e1046fd44b8bd1bcdd2470", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c1723807cbaf4e4cbafd903bd4810d3c3c7dd2624e1046fd44b8bd1bcdd2470", kill_on_drop: false }`
[INFO] [stdout] 7c1723807cbaf4e4cbafd903bd4810d3c3c7dd2624e1046fd44b8bd1bcdd2470
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b98202ad067d72e45cec8be3d5c15d86ef0fd086" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9bc658ae4c3173d5b03c60768cd7f043d2955eb048f44d18e3b7c32a1862a8c4
[INFO] running `Command { std: "docker" "start" "-a" "9bc658ae4c3173d5b03c60768cd7f043d2955eb048f44d18e3b7c32a1862a8c4", kill_on_drop: false }`
[INFO] [stderr]     Checking opendatastructures-study v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Queue` is never used
[INFO] [stdout]  --> src/ch02/array_queue.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Queue<T> {
[INFO] [stdout]   |       ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayQueue` is never constructed
[INFO] [stdout]  --> src/ch02/array_queue.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct ArrayQueue<T> where T: Default + Copy {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `with_capacity`, `capacity`, `resize`, and `debug` are never used
[INFO] [stdout]   --> src/ch02/array_queue.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T> ArrayQueue<T> where T: Default + Copy + std::fmt::Debug {
[INFO] [stdout]    | --------------------------------------------------------------- associated items in this implementation
[INFO] [stdout] 14 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn with_capacity(n: usize) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn capacity(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn resize(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn debug(&self, tag: &str) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `List` is never used
[INFO] [stdout]  --> src/ch02/array_stack.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait List<T> {
[INFO] [stdout]   |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArrayStack` is never constructed
[INFO] [stdout]  --> src/ch02/array_stack.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct ArrayStack<T> where T: Default + Copy {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `resize`, and `capacity` are never used
[INFO] [stdout]   --> src/ch02/array_stack.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T> ArrayStack<T> where T: Default + Copy {
[INFO] [stdout]    | --------------------------------------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn resize(&mut self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn capacity(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `debug` is never used
[INFO] [stdout]   --> src/ch02/array_queue.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T> ArrayQueue<T> where T: Default + Copy + std::fmt::Debug {
[INFO] [stdout]    | --------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn debug(&self, tag: &str) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "9bc658ae4c3173d5b03c60768cd7f043d2955eb048f44d18e3b7c32a1862a8c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bc658ae4c3173d5b03c60768cd7f043d2955eb048f44d18e3b7c32a1862a8c4", kill_on_drop: false }`
[INFO] [stdout] 9bc658ae4c3173d5b03c60768cd7f043d2955eb048f44d18e3b7c32a1862a8c4
