[INFO] fetching crate mod_player 0.1.4...
[INFO] checking mod_player-0.1.4 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate mod_player 0.1.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mod_player 0.1.4 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mod_player 0.1.4
[INFO] finished tweaking crates.io crate mod_player 0.1.4
[INFO] tweaked toml for crates.io crate mod_player 0.1.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0cead01d7515d3a6afc780f8774cdc401b7dcac1d6c08d099a13b927d4dc5be0
[INFO] running `Command { std: "docker" "start" "-a" "0cead01d7515d3a6afc780f8774cdc401b7dcac1d6c08d099a13b927d4dc5be0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cead01d7515d3a6afc780f8774cdc401b7dcac1d6c08d099a13b927d4dc5be0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cead01d7515d3a6afc780f8774cdc401b7dcac1d6c08d099a13b927d4dc5be0", kill_on_drop: false }`
[INFO] [stdout] 0cead01d7515d3a6afc780f8774cdc401b7dcac1d6c08d099a13b927d4dc5be0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aab5de6aed79c6148d70d5e9091af249c96d51b5d65909bf5e9b0e1de25b14e4
[INFO] running `Command { std: "docker" "start" "-a" "aab5de6aed79c6148d70d5e9091af249c96d51b5d65909bf5e9b0e1de25b14e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking mod_player v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/bin/scan_play.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `f` is assigned to, but never used
[INFO] [stdout]   --> src/bin/scan_play.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut f = 0.0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_f` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking cpal v0.8.2
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]     Checking serde_json v1.0.61
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/bin/scan_play.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `f` is assigned to, but never used
[INFO] [stdout]   --> src/bin/scan_play.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut f = 0.0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_f` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Stop`
[INFO] [stdout]  --> examples/streaming_player.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Stop {},
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> examples/streaming_player.rs:72:9
[INFO] [stdout]    |
[INFO] [stdout] 72 |         std::io::stdin().read_line(&mut command);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> examples/convert_to_wav.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         writer.write_sample(left);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> examples/convert_to_wav.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |         writer.write_sample(right);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.70s
[INFO] running `Command { std: "docker" "inspect" "aab5de6aed79c6148d70d5e9091af249c96d51b5d65909bf5e9b0e1de25b14e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aab5de6aed79c6148d70d5e9091af249c96d51b5d65909bf5e9b0e1de25b14e4", kill_on_drop: false }`
[INFO] [stdout] aab5de6aed79c6148d70d5e9091af249c96d51b5d65909bf5e9b0e1de25b14e4