[INFO] crate mod_player 0.1.4 is already in cache
[INFO] checking mod_player-0.1.4 against try#d27c6c6a469a28343396a8f3ac1c9d403aabda69 for pr-66037
[INFO] extracting crate mod_player 0.1.4 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate mod_player 0.1.4 on toolchain d27c6c6a469a28343396a8f3ac1c9d403aabda69
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-9/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+d27c6c6a469a28343396a8f3ac1c9d403aabda69" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] de315c67c7a3470b5e1d6d1f9de6350cbb77c24dcba5165d2ef6b3335144299b
[INFO] running `"docker" "start" "-a" "de315c67c7a3470b5e1d6d1f9de6350cbb77c24dcba5165d2ef6b3335144299b"`
[INFO] [stderr]     Checking mod_player v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/convert_to_wav.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |         writer.write_sample(left);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/convert_to_wav.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         writer.write_sample(right);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/bin/scan_play.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `f` is assigned to, but never used
[INFO] [stderr]   --> src/bin/scan_play.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let mut f = 0.0;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_f` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::env`
[INFO] [stderr]  --> src/bin/scan_play.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::env;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `f` is assigned to, but never used
[INFO] [stderr]   --> src/bin/scan_play.rs:41:17
[INFO] [stderr]    |
[INFO] [stderr] 41 |         let mut f = 0.0;
[INFO] [stderr]    |                 ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]    = note: consider using `_f` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Stop`
[INFO] [stderr]  --> examples/streaming_player.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Stop {},
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/streaming_player.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |         std::io::stdin().read_line(&mut command);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.79s
[INFO] running `"docker" "inspect" "de315c67c7a3470b5e1d6d1f9de6350cbb77c24dcba5165d2ef6b3335144299b"`
[INFO] running `"docker" "rm" "-f" "de315c67c7a3470b5e1d6d1f9de6350cbb77c24dcba5165d2ef6b3335144299b"`
[INFO] [stdout] de315c67c7a3470b5e1d6d1f9de6350cbb77c24dcba5165d2ef6b3335144299b