[INFO] fetching crate usbapi 0.2.1...
[INFO] checking usbapi-0.2.1 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] extracting crate usbapi 0.2.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate usbapi 0.2.1 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate usbapi 0.2.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate usbapi 0.2.1
[INFO] tweaked toml for crates.io crate usbapi 0.2.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate usbapi 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arc-swap v0.4.7
[INFO] [stderr]   Downloaded signal-hook-registry v1.2.1
[INFO] [stderr]   Downloaded nix v0.18.0
[INFO] [stderr]   Downloaded syn v1.0.40
[INFO] [stderr]   Downloaded signal-hook v0.1.16
[INFO] [stderr]   Downloaded proc-macro2 v1.0.20
[INFO] [stderr]   Downloaded array-init v0.0.4
[INFO] [stderr]   Downloaded sysfs-serde v0.2.0
[INFO] [stderr]   Downloaded serde-hex v0.1.0
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fe28813b400fa13713dd651497302ad607a5ea740b1de7163cb9c7e7655f0bf
[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" "5fe28813b400fa13713dd651497302ad607a5ea740b1de7163cb9c7e7655f0bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fe28813b400fa13713dd651497302ad607a5ea740b1de7163cb9c7e7655f0bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fe28813b400fa13713dd651497302ad607a5ea740b1de7163cb9c7e7655f0bf", kill_on_drop: false }`
[INFO] [stdout] 5fe28813b400fa13713dd651497302ad607a5ea740b1de7163cb9c7e7655f0bf
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 477a9504923624f099ff87b3b726bd59a7de516457270ab930fc2c9ddd489594
[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" "477a9504923624f099ff87b3b726bd59a7de516457270ab930fc2c9ddd489594", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.40
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking serde-hex v0.1.0
[INFO] [stderr]     Checking sysfs-serde v0.2.0
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking usbapi v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/os/linux/usbfs.rs:579:13
[INFO] [stdout]     |
[INFO] [stdout] 579 |         let mut ptr = unsafe {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/os/linux/usbfs.rs:579:13
[INFO] [stdout]     |
[INFO] [stdout] 579 |         let mut ptr = unsafe {
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> examples/enumerate.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut usb = UsbEnumerate::from_sysfs().expect("Could not find /dev/bus/usb are you running windows or maybe freebsd or mac or... wh...
[INFO] [stdout]   |         ----^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.91s
[INFO] running `Command { std: "docker" "inspect" "477a9504923624f099ff87b3b726bd59a7de516457270ab930fc2c9ddd489594", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "477a9504923624f099ff87b3b726bd59a7de516457270ab930fc2c9ddd489594", kill_on_drop: false }`
[INFO] [stdout] 477a9504923624f099ff87b3b726bd59a7de516457270ab930fc2c9ddd489594