[INFO] fetching crate beep 0.2.1...
[INFO] checking beep-0.2.1 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate beep 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate beep 0.2.1 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate beep 0.2.1
[INFO] finished tweaking crates.io crate beep 0.2.1
[INFO] tweaked toml for crates.io crate beep 0.2.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 22072c9b25055ddbec5cd33e774c147332f9487ac67eb87c07d448c30fa99a13
[INFO] running `"docker" "start" "-a" "22072c9b25055ddbec5cd33e774c147332f9487ac67eb87c07d448c30fa99a13"`
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling dimensioned v0.6.0
[INFO] [stderr]     Checking generic-array v0.5.1
[INFO] [stderr]     Checking beep v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `F`
[INFO] [stderr]   --> examples/song.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 |   let F = Hertz::new(2673.0f64);
[INFO] [stderr]    |       ^ help: consider prefixing with an underscore: `_F`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `C` should have a snake case name
[INFO] [stderr]   --> examples/song.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 |   let C = Hertz::new(2093.0f64);
[INFO] [stderr]    |       ^ help: convert the identifier to snake case: `c`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `D` should have a snake case name
[INFO] [stderr]   --> examples/song.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 |   let D = Hertz::new(2349.0f64);
[INFO] [stderr]    |       ^ help: convert the identifier to snake case: `d`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `E` should have a snake case name
[INFO] [stderr]   --> examples/song.rs:12:7
[INFO] [stderr]    |
[INFO] [stderr] 12 |   let E = Hertz::new(2673.0f64);
[INFO] [stderr]    |       ^ help: convert the identifier to snake case: `e`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `F` should have a snake case name
[INFO] [stderr]   --> examples/song.rs:13:7
[INFO] [stderr]    |
[INFO] [stderr] 13 |   let F = Hertz::new(2673.0f64);
[INFO] [stderr]    |       ^ help: convert the identifier to snake case: `f`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `G` should have a snake case name
[INFO] [stderr]   --> examples/song.rs:14:7
[INFO] [stderr]    |
[INFO] [stderr] 14 |   let G = Hertz::new(3136.0f64);
[INFO] [stderr]    |       ^ help: convert the identifier to snake case: `g`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.06s
[INFO] running `"docker" "inspect" "22072c9b25055ddbec5cd33e774c147332f9487ac67eb87c07d448c30fa99a13"`
[INFO] running `"docker" "rm" "-f" "22072c9b25055ddbec5cd33e774c147332f9487ac67eb87c07d448c30fa99a13"`
[INFO] [stdout] 22072c9b25055ddbec5cd33e774c147332f9487ac67eb87c07d448c30fa99a13