[INFO] cloning repository https://github.com/JoNil/serious_synth_thing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JoNil/serious_synth_thing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoNil%2Fserious_synth_thing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoNil%2Fserious_synth_thing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a5edf7c4e0959f15c38079f187645afee210bd0c
[INFO] checking JoNil/serious_synth_thing against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoNil%2Fserious_synth_thing" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JoNil/serious_synth_thing on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JoNil/serious_synth_thing
[INFO] finished tweaking git repo https://github.com/JoNil/serious_synth_thing
[INFO] tweaked toml for git repo https://github.com/JoNil/serious_synth_thing written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/JoNil/serious_synth_thing already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d41ecf1b8a8d64b2b6d6f236b321eecd4893b9404cf9d692ec94cd751c0786a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1d41ecf1b8a8d64b2b6d6f236b321eecd4893b9404cf9d692ec94cd751c0786a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d41ecf1b8a8d64b2b6d6f236b321eecd4893b9404cf9d692ec94cd751c0786a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d41ecf1b8a8d64b2b6d6f236b321eecd4893b9404cf9d692ec94cd751c0786a", kill_on_drop: false }`
[INFO] [stdout] 1d41ecf1b8a8d64b2b6d6f236b321eecd4893b9404cf9d692ec94cd751c0786a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6f323edf63789defdab82386c7f77430ac00d79583ea3e52e520122b5b96c38
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d6f323edf63789defdab82386c7f77430ac00d79583ea3e52e520122b5b96c38", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking lazy_static v0.2.5
[INFO] [stderr]     Checking futures v0.1.11
[INFO] [stderr]    Compiling alsa-sys v0.1.1
[INFO] [stderr]     Checking cpal v0.8.0
[INFO] [stderr]     Checking serious_synth_thing v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `futures::stream::Stream`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::stream::Stream;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::task`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures::task;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::task::Executor`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::task::Executor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::task::Run`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::task::Run;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::stream::Stream`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::stream::Stream;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::task`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures::task;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::task::Executor`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::task::Executor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::task::Run`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::task::Run;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `envelope`
[INFO] [stdout]   --> src/synth_thingy.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     envelope: Envelope,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attack`
[INFO] [stdout]   --> src/synth_thingy.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     attack: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sustain`
[INFO] [stdout]   --> src/synth_thingy.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     sustain: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `decay`
[INFO] [stdout]   --> src/synth_thingy.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     decay: i32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `release`
[INFO] [stdout]   --> src/synth_thingy.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     release: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `MyExecutor`
[INFO] [stdout]   --> src/main.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct MyExecutor;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `envelope`
[INFO] [stdout]   --> src/synth_thingy.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     envelope: Envelope,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attack`
[INFO] [stdout]   --> src/synth_thingy.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     attack: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sustain`
[INFO] [stdout]   --> src/synth_thingy.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     sustain: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `decay`
[INFO] [stdout]   --> src/synth_thingy.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     decay: i32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `release`
[INFO] [stdout]   --> src/synth_thingy.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     release: i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 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 3.67s
[INFO] running `Command { std: "docker" "inspect" "d6f323edf63789defdab82386c7f77430ac00d79583ea3e52e520122b5b96c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6f323edf63789defdab82386c7f77430ac00d79583ea3e52e520122b5b96c38", kill_on_drop: false }`
[INFO] [stdout] d6f323edf63789defdab82386c7f77430ac00d79583ea3e52e520122b5b96c38