[INFO] cloning repository https://github.com/redixhumayun/rs-examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/redixhumayun/rs-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredixhumayun%2Frs-examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredixhumayun%2Frs-examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] becdd6e52619b1cfd02118f6ed0214b90320d9ad
[INFO] checking redixhumayun/rs-examples against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fredixhumayun%2Frs-examples" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/redixhumayun/rs-examples on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/redixhumayun/rs-examples
[INFO] finished tweaking git repo https://github.com/redixhumayun/rs-examples
[INFO] tweaked toml for git repo https://github.com/redixhumayun/rs-examples written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/redixhumayun/rs-examples 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6765e2277a1fea12fe24f171a14d987f9ce0f7d58f3650ef5e2952055617f4c
[INFO] running `Command { std: "docker" "start" "-a" "e6765e2277a1fea12fe24f171a14d987f9ce0f7d58f3650ef5e2952055617f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6765e2277a1fea12fe24f171a14d987f9ce0f7d58f3650ef5e2952055617f4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6765e2277a1fea12fe24f171a14d987f9ce0f7d58f3650ef5e2952055617f4c", kill_on_drop: false }`
[INFO] [stdout] e6765e2277a1fea12fe24f171a14d987f9ce0f7d58f3650ef5e2952055617f4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2f12306b7d91ac2844bebb7a7921a7e917dac11320ef471e46ccadbe2d908df2
[INFO] running `Command { std: "docker" "start" "-a" "2f12306b7d91ac2844bebb7a7921a7e917dac11320ef471e46ccadbe2d908df2", kill_on_drop: false }`
[INFO] [stderr]     Checking atomics v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Channel` is never constructed
[INFO] [stdout]  --> src/channel.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Channel<T> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `send`, `receive`, and `is_ready` are never used
[INFO] [stdout]   --> src/channel.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 11 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn send(&self, message: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn receive(&self) -> T {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn is_ready(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `split` are never used
[INFO] [stdout]   --> src/channel_split.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl<T> Channel<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 18 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     fn split<'a>(&'a mut self) -> (Sender<'a, T>, Receiver<'a, T>) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Sender` is never constructed
[INFO] [stdout]   --> src/channel_split.rs:47:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct Sender<'a, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `send` is never used
[INFO] [stdout]   --> src/channel_split.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | impl<T> Sender<'_, T> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] 53 |     fn send(self, message: T) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Receiver` is never constructed
[INFO] [stdout]   --> src/channel_split.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Receiver<'a, T> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_ready` and `receive` are never used
[INFO] [stdout]   --> src/channel_split.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | impl<T> Receiver<'_, T> {
[INFO] [stdout]    | ----------------------- methods in this implementation
[INFO] [stdout] 68 |     fn is_ready(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     fn receive(self) -> T {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_ready` is never used
[INFO] [stdout]   --> src/channel_split.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 67 | impl<T> Receiver<'_, T> {
[INFO] [stdout]    | ----------------------- method in this implementation
[INFO] [stdout] 68 |     fn is_ready(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "2f12306b7d91ac2844bebb7a7921a7e917dac11320ef471e46ccadbe2d908df2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f12306b7d91ac2844bebb7a7921a7e917dac11320ef471e46ccadbe2d908df2", kill_on_drop: false }`
[INFO] [stdout] 2f12306b7d91ac2844bebb7a7921a7e917dac11320ef471e46ccadbe2d908df2