[INFO] cloning repository https://github.com/parbo/soundfont-deluge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/parbo/soundfont-deluge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparbo%2Fsoundfont-deluge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparbo%2Fsoundfont-deluge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6585d6fb2f125aa1e2dec7ff7b9c00197ffbd491
[INFO] checking parbo/soundfont-deluge against master#31ee872db5aae4750e3da1ca4ed1523c4356947f for pr-78461
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparbo%2Fsoundfont-deluge" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/parbo/soundfont-deluge on toolchain 31ee872db5aae4750e3da1ca4ed1523c4356947f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/parbo/soundfont-deluge
[INFO] finished tweaking git repo https://github.com/parbo/soundfont-deluge
[INFO] tweaked toml for git repo https://github.com/parbo/soundfont-deluge written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/parbo/soundfont-deluge already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de92cf879bf3b158e3f9c9bae118b33d144f19a8a7a1934c8370b4021f25501c
[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" "de92cf879bf3b158e3f9c9bae118b33d144f19a8a7a1934c8370b4021f25501c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de92cf879bf3b158e3f9c9bae118b33d144f19a8a7a1934c8370b4021f25501c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de92cf879bf3b158e3f9c9bae118b33d144f19a8a7a1934c8370b4021f25501c", kill_on_drop: false }`
[INFO] [stdout] de92cf879bf3b158e3f9c9bae118b33d144f19a8a7a1934c8370b4021f25501c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+31ee872db5aae4750e3da1ca4ed1523c4356947f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f52f5c802b26cd9fedb06de3382d910b12efc63562b8dfda91ba1392c618825d
[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" "f52f5c802b26cd9fedb06de3382d910b12efc63562b8dfda91ba1392c618825d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking regex-syntax v0.6.20
[INFO] [stderr]     Checking xmlwriter v0.1.0
[INFO] [stderr]     Checking riff v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.14
[INFO] [stderr]     Checking riff v0.1.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking wav v0.4.1
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking env_logger v0.8.1
[INFO] [stderr]    Compiling binread_derive v1.1.1
[INFO] [stderr]     Checking binread v1.1.1
[INFO] [stderr]     Checking soundfont-deluge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `low`
[INFO] [stdout]    --> src/main.rs:825:49
[INFO] [stdout]     |
[INFO] [stdout] 825 |                 if let Some(Generator::KeyRange(low, high)) =
[INFO] [stdout]     |                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_low`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `low`
[INFO] [stdout]    --> src/main.rs:825:49
[INFO] [stdout]     |
[INFO] [stdout] 825 |                 if let Some(Generator::KeyRange(low, high)) =
[INFO] [stdout]     |                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_low`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sample_data`
[INFO] [stdout]    --> src/main.rs:395:5
[INFO] [stdout]     |
[INFO] [stdout] 395 |     sample_data: Vec<u8>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump`
[INFO] [stdout]    --> src/main.rs:614:8
[INFO] [stdout]     |
[INFO] [stdout] 614 |     fn dump(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save_samples`
[INFO] [stdout]    --> src/main.rs:946:8
[INFO] [stdout]     |
[INFO] [stdout] 946 |     fn save_samples(&self, folder: &Path) -> std::io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `sample_data`
[INFO] [stdout]    --> src/main.rs:395:5
[INFO] [stdout]     |
[INFO] [stdout] 395 |     sample_data: Vec<u8>,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dump`
[INFO] [stdout]    --> src/main.rs:614:8
[INFO] [stdout]     |
[INFO] [stdout] 614 |     fn dump(&self) {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `save_samples`
[INFO] [stdout]    --> src/main.rs:946:8
[INFO] [stdout]     |
[INFO] [stdout] 946 |     fn save_samples(&self, folder: &Path) -> std::io::Result<()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.55s
[INFO] running `Command { std: "docker" "inspect" "f52f5c802b26cd9fedb06de3382d910b12efc63562b8dfda91ba1392c618825d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f52f5c802b26cd9fedb06de3382d910b12efc63562b8dfda91ba1392c618825d", kill_on_drop: false }`
[INFO] [stdout] f52f5c802b26cd9fedb06de3382d910b12efc63562b8dfda91ba1392c618825d