[INFO] updating cached repository https://github.com/openbuttnakedgang/holter-bridge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e05f3b0b53c33f31f5fc2d4e7bf896ec2e1033f7
[INFO] checking openbuttnakedgang/holter-bridge against master#e1beee4992ad4b235fc700bf7af1ee86f894ea53 for pr-74130
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fopenbuttnakedgang%2Fholter-bridge" "/workspace/builds/worker-12/source", kill_on_drop: false }`
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[INFO] validating manifest of git repo https://github.com/openbuttnakedgang/holter-bridge on toolchain e1beee4992ad4b235fc700bf7af1ee86f894ea53
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/openbuttnakedgang/holter-bridge
[INFO] finished tweaking git repo https://github.com/openbuttnakedgang/holter-bridge
[INFO] tweaked toml for git repo https://github.com/openbuttnakedgang/holter-bridge written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
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[INFO] [stdout] 3e3964db0959666c741fe19edc8a2e6947bbac53bbce1a1948393f5493ef93a4
[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" "3e3964db0959666c741fe19edc8a2e6947bbac53bbce1a1948393f5493ef93a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e3964db0959666c741fe19edc8a2e6947bbac53bbce1a1948393f5493ef93a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e3964db0959666c741fe19edc8a2e6947bbac53bbce1a1948393f5493ef93a4", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+e1beee4992ad4b235fc700bf7af1ee86f894ea53" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51ce9163023544892a824fe321d56a198fc55bc18b5f8881614221d7ed230731
[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" "51ce9163023544892a824fe321d56a198fc55bc18b5f8881614221d7ed230731", kill_on_drop: false }`
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[INFO] [stdout] warning: unused import: `DeviceHandle`
[INFO] [stdout]  --> src/usb.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | use libusb::{Context as CxUsb, DeviceHandle};
[INFO] [stdout]   |                                ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `DeviceHandle`
[INFO] [stdout]  --> src/usb.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 6 | use libusb::{Context as CxUsb, DeviceHandle};
[INFO] [stdout]   |                                ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/usbfutures.rs:160:29
[INFO] [stdout]     |
[INFO] [stdout] 159 |                     data_rx : todo!(),
[INFO] [stdout]     |                               ------- any code following this expression is unreachable
[INFO] [stdout] 160 |                     req_tx: None,
[INFO] [stdout]     |                             ^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/usbfutures.rs:160:29
[INFO] [stdout]     |
[INFO] [stdout] 159 |                     data_rx : todo!(),
[INFO] [stdout]     |                               ------- any code following this expression is unreachable
[INFO] [stdout] 160 |                     req_tx: None,
[INFO] [stdout]     |                             ^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EP_VIS`
[INFO] [stdout]   --> src/usb.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub const EP_VIS: u8 = 0x83;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EP_DATA_OUT`
[INFO] [stdout]   --> src/usb.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub const EP_DATA_OUT: u8 = 0x07;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EP_DATA_IN`
[INFO] [stdout]   --> src/usb.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub const EP_DATA_IN: u8 = 0x86;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `device`
[INFO] [stdout]   --> src/usbfutures.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     device: Arc<DeviceHandle<'static>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `read_thread`
[INFO] [stdout]   --> src/usbfutures.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     read_thread: Option<std::thread::JoinHandle<()>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EP_VIS`
[INFO] [stdout]   --> src/usb.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub const EP_VIS: u8 = 0x83;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EP_DATA_OUT`
[INFO] [stdout]   --> src/usb.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub const EP_DATA_OUT: u8 = 0x07;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `EP_DATA_IN`
[INFO] [stdout]   --> src/usb.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub const EP_DATA_IN: u8 = 0x86;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `device`
[INFO] [stdout]   --> src/usbfutures.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     device: Arc<DeviceHandle<'static>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `read_thread`
[INFO] [stdout]   --> src/usbfutures.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     read_thread: Option<std::thread::JoinHandle<()>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 16s
[INFO] running `Command { std: "docker" "inspect" "51ce9163023544892a824fe321d56a198fc55bc18b5f8881614221d7ed230731", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51ce9163023544892a824fe321d56a198fc55bc18b5f8881614221d7ed230731", kill_on_drop: false }`
[INFO] [stdout] 51ce9163023544892a824fe321d56a198fc55bc18b5f8881614221d7ed230731