[INFO] cloning repository https://github.com/shakyShane/async-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shakyShane/async-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FshakyShane%2Fasync-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FshakyShane%2Fasync-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 39ab20969f3b5a9a0c8d5ada730e79e2cc22e3cd
[INFO] checking shakyShane/async-rust against master#b0696a5160711c068cb1f01b7437db7990d15750 for pr-121848
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FshakyShane%2Fasync-rust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shakyShane/async-rust on toolchain b0696a5160711c068cb1f01b7437db7990d15750
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b0696a5160711c068cb1f01b7437db7990d15750" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shakyShane/async-rust
[INFO] finished tweaking git repo https://github.com/shakyShane/async-rust
[INFO] tweaked toml for git repo https://github.com/shakyShane/async-rust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/shakyShane/async-rust 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" "+b0696a5160711c068cb1f01b7437db7990d15750" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking shakyShane/async-rust against try#bfe97fcae016881ad333f0ff8cea2cadb9cf136c for pr-121848
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FshakyShane%2Fasync-rust" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shakyShane/async-rust on toolchain bfe97fcae016881ad333f0ff8cea2cadb9cf136c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shakyShane/async-rust
[INFO] finished tweaking git repo https://github.com/shakyShane/async-rust
[INFO] tweaked toml for git repo https://github.com/shakyShane/async-rust written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/shakyShane/async-rust 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" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e759b35873cfb483d8349d0e029732b155e919de46601ee6c4fd17f3026e899a
[INFO] running `Command { std: "docker" "start" "-a" "e759b35873cfb483d8349d0e029732b155e919de46601ee6c4fd17f3026e899a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e759b35873cfb483d8349d0e029732b155e919de46601ee6c4fd17f3026e899a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e759b35873cfb483d8349d0e029732b155e919de46601ee6c4fd17f3026e899a", kill_on_drop: false }`
[INFO] [stdout] e759b35873cfb483d8349d0e029732b155e919de46601ee6c4fd17f3026e899a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bfe97fcae016881ad333f0ff8cea2cadb9cf136c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 410c6c5121ecd5e465876d96022dbd9cfd923e93b0cc7c7ec1a75d1c6320e0a4
[INFO] running `Command { std: "docker" "start" "-a" "410c6c5121ecd5e465876d96022dbd9cfd923e93b0cc7c7ec1a75d1c6320e0a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling crossbeam-utils v0.8.10
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling crossbeam-queue v0.3.5
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]    Compiling anyhow v1.0.58
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.9
[INFO] [stderr]     Checking crossbeam-channel v0.5.5
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking crossbeam v0.8.1
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking async-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `RecvError`
[INFO] [stdout]  --> src/channeltimer.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crossbeam::channel::{RecvError, Sender};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RecvError`
[INFO] [stdout]  --> src/channeltimer.rs:8:26
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crossbeam::channel::{RecvError, Sender};
[INFO] [stdout]   |                          ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Init` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Init;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Countdown` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Countdown;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Init` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Init;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LastStretch` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct LastStretch;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Countdown` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Countdown;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Done` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Done;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LastStretch` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct LastStretch;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Done` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Done;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Timer` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Timer<S> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Timer` is never constructed
[INFO] [stdout]   --> src/channeltimer.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Timer<S> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `start` is never used
[INFO] [stdout]   --> src/channeltimer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Timer<Init> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn start(self) -> Timer<Countdown> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `start` is never used
[INFO] [stdout]   --> src/channeltimer.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Timer<Init> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn start(self) -> Timer<Countdown> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/channeltimer.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl Timer<Countdown> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] 42 |     /// Run down the timer until time is out.
[INFO] [stdout] 43 |     fn run(self) -> Timer<LastStretch> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/channeltimer.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl Timer<LastStretch> {
[INFO] [stdout]    | ----------------------- method in this implementation
[INFO] [stdout] 70 |     /// Run down the timer until time is out.
[INFO] [stdout] 71 |     fn run(self) -> Timer<Done> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/channeltimer.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | impl Timer<Countdown> {
[INFO] [stdout]    | --------------------- method in this implementation
[INFO] [stdout] 42 |     /// Run down the timer until time is out.
[INFO] [stdout] 43 |     fn run(self) -> Timer<LastStretch> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `run` is never used
[INFO] [stdout]   --> src/channeltimer.rs:71:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | impl Timer<LastStretch> {
[INFO] [stdout]    | ----------------------- method in this implementation
[INFO] [stdout] 70 |     /// Run down the timer until time is out.
[INFO] [stdout] 71 |     fn run(self) -> Timer<Done> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `wait` is never used
[INFO] [stdout]    --> src/channeltimer.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 98  | impl Timer<Done> {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] 99  |     /// Flash warning until program is killed
[INFO] [stdout] 100 |     fn wait(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Progress` is never used
[INFO] [stdout]    --> src/channeltimer.rs:105:6
[INFO] [stdout]     |
[INFO] [stdout] 105 | enum Progress {
[INFO] [stdout]     |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `wait` is never used
[INFO] [stdout]    --> src/channeltimer.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 98  | impl Timer<Done> {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] 99  |     /// Flash warning until program is killed
[INFO] [stdout] 100 |     fn wait(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> src/channeltimer.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn main()  {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Progress` is never used
[INFO] [stdout]    --> src/channeltimer.rs:105:6
[INFO] [stdout]     |
[INFO] [stdout] 105 | enum Progress {
[INFO] [stdout]     |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]    --> src/channeltimer.rs:111:4
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn main()  {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.97s
[INFO] running `Command { std: "docker" "inspect" "410c6c5121ecd5e465876d96022dbd9cfd923e93b0cc7c7ec1a75d1c6320e0a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "410c6c5121ecd5e465876d96022dbd9cfd923e93b0cc7c7ec1a75d1c6320e0a4", kill_on_drop: false }`
[INFO] [stdout] 410c6c5121ecd5e465876d96022dbd9cfd923e93b0cc7c7ec1a75d1c6320e0a4
