[INFO] cloning repository https://github.com/cbbfcd/fuck-leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cbbfcd/fuck-leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbbfcd%2Ffuck-leetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbbfcd%2Ffuck-leetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a13b0586be03daed9952c53f7b036f8eeef2d63f
[INFO] checking cbbfcd/fuck-leetcode against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcbbfcd%2Ffuck-leetcode" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cbbfcd/fuck-leetcode
[INFO] finished tweaking git repo https://github.com/cbbfcd/fuck-leetcode
[INFO] tweaked toml for git repo https://github.com/cbbfcd/fuck-leetcode written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cbbfcd/fuck-leetcode on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/cbbfcd/fuck-leetcode 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b9e1e453b8432fb847cd64538f22894487e75df738f7b58692b9f29a92cb828
[INFO] running `Command { std: "docker" "start" "-a" "1b9e1e453b8432fb847cd64538f22894487e75df738f7b58692b9f29a92cb828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b9e1e453b8432fb847cd64538f22894487e75df738f7b58692b9f29a92cb828", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b9e1e453b8432fb847cd64538f22894487e75df738f7b58692b9f29a92cb828", kill_on_drop: false }`
[INFO] [stdout] 1b9e1e453b8432fb847cd64538f22894487e75df738f7b58692b9f29a92cb828
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ea158cf9993abfddac3e70ddbea58238dbc8f0223330c87fbaf28785ef79c8a
[INFO] running `Command { std: "docker" "start" "-a" "8ea158cf9993abfddac3e70ddbea58238dbc8f0223330c87fbaf28785ef79c8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling leetcode_test v0.1.2
[INFO] [stderr]     Checking leetcode_prelude v0.2.3
[INFO] [stderr]     Checking fuck-leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `CQueue` is never constructed
[INFO] [stdout]  --> src/two_stack_2_queue.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct CQueue {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a` and `b` are never read
[INFO] [stdout]  --> src/two_stack_2_queue.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct CQueue {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 4 |   a: Vec<i32>,
[INFO] [stdout]   |   ^
[INFO] [stdout] 5 |   b: Vec<i32>
[INFO] [stdout]   |   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `append_tail`, and `delete_head` are never used
[INFO] [stdout]   --> src/two_stack_2_queue.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl CQueue {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 13 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |   fn append_tail(&mut self, value: i32) {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |   fn delete_head(&mut self) -> i32 {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fuck-leetcode` (lib) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8ea158cf9993abfddac3e70ddbea58238dbc8f0223330c87fbaf28785ef79c8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ea158cf9993abfddac3e70ddbea58238dbc8f0223330c87fbaf28785ef79c8a", kill_on_drop: false }`
[INFO] [stdout] 8ea158cf9993abfddac3e70ddbea58238dbc8f0223330c87fbaf28785ef79c8a