[INFO] fetching crate usb-device 0.2.8...
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] crate usb-device 0.2.8 is already in cache
[INFO] checking usb-device-0.2.8 against master#21de280cccb4eb02ead6bf0af40e2355a9136d6f for pr-100043
[INFO] extracting crate usb-device 0.2.8 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate usb-device 0.2.8 on toolchain 21de280cccb4eb02ead6bf0af40e2355a9136d6f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate usb-device 0.2.8
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate usb-device 0.2.8
[INFO] tweaked toml for crates.io crate usb-device 0.2.8 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libusb v0.3.0
[INFO] [stderr]   Downloaded libusb-sys v0.2.3
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4a35e4d961a260c09f0f59c00ab99100a8efcd284283e4271bc3592f6020b8ab
[INFO] running `Command { std: "docker" "start" "-a" "4a35e4d961a260c09f0f59c00ab99100a8efcd284283e4271bc3592f6020b8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a35e4d961a260c09f0f59c00ab99100a8efcd284283e4271bc3592f6020b8ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a35e4d961a260c09f0f59c00ab99100a8efcd284283e4271bc3592f6020b8ab", kill_on_drop: false }`
[INFO] [stdout] 4a35e4d961a260c09f0f59c00ab99100a8efcd284283e4271bc3592f6020b8ab
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ecb52c4cf6672b83cc996368a05b4a059042425f2b6ba9cd23a06cdead5d8d70" "/opt/rustwide/cargo-home/bin/cargo" "+21de280cccb4eb02ead6bf0af40e2355a9136d6f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b018de33c2cb81ec467e03e58814aa41e2f34c860ea4f2a14b3c22a54778beea
[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" "b018de33c2cb81ec467e03e58814aa41e2f34c860ea4f2a14b3c22a54778beea", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.127
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking usb-device v0.2.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bit-set v0.2.0
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]    --> src/lib.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     struct DummyBus<'a> {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] 200 |         a: &'a str,
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ep` is never read
[INFO] [stdout]    --> src/lib.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 235 |     struct DummyClass<'a, B: UsbBus> {
[INFO] [stdout]     |            ---------- field in this struct
[INFO] [stdout] 236 |         ep: crate::endpoint::EndpointIn<'a, B>,
[INFO] [stdout]     |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:240:12
[INFO] [stdout]     |
[INFO] [stdout] 240 |         fn new(alloc: &UsbBusAllocator<B>) -> DummyClass<'_, B> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling libusb-sys v0.2.3
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking libusb v0.3.0
[INFO] [stdout] warning: field `a` is never read
[INFO] [stdout]    --> src/lib.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     struct DummyBus<'a> {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] 200 |         a: &'a str,
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `ep` is never read
[INFO] [stdout]    --> src/lib.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 235 |     struct DummyClass<'a, B: UsbBus> {
[INFO] [stdout]     |            ---------- field in this struct
[INFO] [stdout] 236 |         ep: crate::endpoint::EndpointIn<'a, B>,
[INFO] [stdout]     |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:240:12
[INFO] [stdout]     |
[INFO] [stdout] 240 |         fn new(alloc: &UsbBusAllocator<B>) -> DummyClass<'_, B> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.49s
[INFO] running `Command { std: "docker" "inspect" "b018de33c2cb81ec467e03e58814aa41e2f34c860ea4f2a14b3c22a54778beea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b018de33c2cb81ec467e03e58814aa41e2f34c860ea4f2a14b3c22a54778beea", kill_on_drop: false }`
[INFO] [stdout] b018de33c2cb81ec467e03e58814aa41e2f34c860ea4f2a14b3c22a54778beea