[INFO] fetching crate beep 0.2.1...
[INFO] checking beep-0.2.1 against master#7f5a42b073dc2bee2aa625052eb066ee07072048 for pr-78991
[INFO] extracting crate beep 0.2.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate beep 0.2.1 on toolchain 7f5a42b073dc2bee2aa625052eb066ee07072048
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75d8273b785c768e1789caa5f284904b85fc4cc13a47a5d4fcd123d6a8da44d4
[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" "75d8273b785c768e1789caa5f284904b85fc4cc13a47a5d4fcd123d6a8da44d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75d8273b785c768e1789caa5f284904b85fc4cc13a47a5d4fcd123d6a8da44d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75d8273b785c768e1789caa5f284904b85fc4cc13a47a5d4fcd123d6a8da44d4", kill_on_drop: false }`
[INFO] [stdout] 75d8273b785c768e1789caa5f284904b85fc4cc13a47a5d4fcd123d6a8da44d4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+7f5a42b073dc2bee2aa625052eb066ee07072048" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 409a1b1187d671f5acac69286250b79378e7e4a559f2d4a70e495ee3be2d2e3a
[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" "409a1b1187d671f5acac69286250b79378e7e4a559f2d4a70e495ee3be2d2e3a", kill_on_drop: false }`
[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] [stdout] warning: unused variable: `F`
[INFO] [stdout]   --> examples/song.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 |   let F = Hertz::new(2673.0f64);
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_F`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `C` should have a snake case name
[INFO] [stdout]   --> examples/song.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 |   let C = Hertz::new(2093.0f64);
[INFO] [stdout]    |       ^ help: convert the identifier to snake case (notice the capitalization): `c`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `D` should have a snake case name
[INFO] [stdout]   --> examples/song.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |   let D = Hertz::new(2349.0f64);
[INFO] [stdout]    |       ^ help: convert the identifier to snake case: `d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `E` should have a snake case name
[INFO] [stdout]   --> examples/song.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 |   let E = Hertz::new(2673.0f64);
[INFO] [stdout]    |       ^ help: convert the identifier to snake case: `e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `F` should have a snake case name
[INFO] [stdout]   --> examples/song.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 |   let F = Hertz::new(2673.0f64);
[INFO] [stdout]    |       ^ help: convert the identifier to snake case (notice the capitalization): `f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `G` should have a snake case name
[INFO] [stdout]   --> examples/song.rs:14:7
[INFO] [stdout]    |
[INFO] [stdout] 14 |   let G = Hertz::new(3136.0f64);
[INFO] [stdout]    |       ^ help: convert the identifier to snake case: `g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.08s
[INFO] running `Command { std: "docker" "inspect" "409a1b1187d671f5acac69286250b79378e7e4a559f2d4a70e495ee3be2d2e3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "409a1b1187d671f5acac69286250b79378e7e4a559f2d4a70e495ee3be2d2e3a", kill_on_drop: false }`
[INFO] [stdout] 409a1b1187d671f5acac69286250b79378e7e4a559f2d4a70e495ee3be2d2e3a