[INFO] cloning repository https://github.com/gespel/StensLab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gespel/StensLab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgespel%2FStensLab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgespel%2FStensLab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f4a4badd4b7a53076f9e6a517da710517b2fcc5
[INFO] checking gespel/StensLab against master#e9271846294c4ee5bd7706df68180320c0b5ff20 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgespel%2FStensLab" "/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/gespel/StensLab on toolchain e9271846294c4ee5bd7706df68180320c0b5ff20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gespel/StensLab
[INFO] finished tweaking git repo https://github.com/gespel/StensLab
[INFO] tweaked toml for git repo https://github.com/gespel/StensLab written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/gespel/StensLab 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" "+e9271846294c4ee5bd7706df68180320c0b5ff20" "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 gespel/StensLab against try#b69bfeecc49bf5661cf54497638430035ff61aa4 for pr-119820
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgespel%2FStensLab" "/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/gespel/StensLab on toolchain b69bfeecc49bf5661cf54497638430035ff61aa4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gespel/StensLab
[INFO] finished tweaking git repo https://github.com/gespel/StensLab
[INFO] tweaked toml for git repo https://github.com/gespel/StensLab written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/gespel/StensLab 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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] adc0e3c46536a555680689509f0314fbf6fd123cd2b168896b206e93a476980a
[INFO] running `Command { std: "docker" "start" "-a" "adc0e3c46536a555680689509f0314fbf6fd123cd2b168896b206e93a476980a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "adc0e3c46536a555680689509f0314fbf6fd123cd2b168896b206e93a476980a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adc0e3c46536a555680689509f0314fbf6fd123cd2b168896b206e93a476980a", kill_on_drop: false }`
[INFO] [stdout] adc0e3c46536a555680689509f0314fbf6fd123cd2b168896b206e93a476980a
[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" "+b69bfeecc49bf5661cf54497638430035ff61aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61a8c09bc53afde8c20582dc29c4ffb69bd903bfd2cb1d094acf80cb74d37294
[INFO] running `Command { std: "docker" "start" "-a" "61a8c09bc53afde8c20582dc29c4ffb69bd903bfd2cb1d094acf80cb74d37294", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling pkg-config v0.3.28
[INFO] [stderr]    Compiling cpal v0.15.2
[INFO] [stderr]     Checking dasp_sample v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]     Checking num-complex v0.4.4
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking alsa v0.7.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking StensLab v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use rand::Rng;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::rngs::ThreadRng`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use rand::rngs::ThreadRng;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use rand::Rng;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::rngs::ThreadRng`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use rand::rngs::ThreadRng;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]   --> src/main.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut rng = rand::thread_rng();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut rng = rand::thread_rng();
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rng`
[INFO] [stdout]   --> src/main.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut rng = rand::thread_rng();
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_rng`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/main.rs:53:15
[INFO] [stdout]    |
[INFO] [stdout] 53 |         move |err| {  // react to errors here.
[INFO] [stdout]    |               ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut rng = rand::thread_rng();
[INFO] [stdout]    |             ----^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/synths.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl SquareSynth {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 41 |     fn new(sample_rate: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rack` is never constructed
[INFO] [stdout]  --> src/rack.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Rack {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_synth` are never used
[INFO] [stdout]   --> src/rack.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rack {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 8  |     fn new() -> Rack {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn add_synth<T: Synth + 'static>(&mut self, synth: T) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `StensLab` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `stens_lab`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/main.rs:53:15
[INFO] [stdout]    |
[INFO] [stdout] 53 |         move |err| {  // react to errors here.
[INFO] [stdout]    |               ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/synths.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl SquareSynth {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 41 |     fn new(sample_rate: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rack` is never constructed
[INFO] [stdout]  --> src/rack.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Rack {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_synth` are never used
[INFO] [stdout]   --> src/rack.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl Rack {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 8  |     fn new() -> Rack {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn add_synth<T: Synth + 'static>(&mut self, synth: T) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `StensLab` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `stens_lab`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `Command { std: "docker" "inspect" "61a8c09bc53afde8c20582dc29c4ffb69bd903bfd2cb1d094acf80cb74d37294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61a8c09bc53afde8c20582dc29c4ffb69bd903bfd2cb1d094acf80cb74d37294", kill_on_drop: false }`
[INFO] [stdout] 61a8c09bc53afde8c20582dc29c4ffb69bd903bfd2cb1d094acf80cb74d37294