[INFO] fetching crate dfu 0.4.2...
[INFO] checking dfu-0.4.2 against try#7c3a44cf5f95fa5cf164a312bdcf845157af7093 for pr-77325
[INFO] extracting crate dfu 0.4.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate dfu 0.4.2 on toolchain 7c3a44cf5f95fa5cf164a312bdcf845157af7093
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dfu 0.4.2
[INFO] finished tweaking crates.io crate dfu 0.4.2
[INFO] tweaked toml for crates.io crate dfu 0.4.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52d7c475a5d4bdd9f68a8f96cfd929951c5776abe6a77ea1b13e5b7b5b4be6c2
[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" "52d7c475a5d4bdd9f68a8f96cfd929951c5776abe6a77ea1b13e5b7b5b4be6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52d7c475a5d4bdd9f68a8f96cfd929951c5776abe6a77ea1b13e5b7b5b4be6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52d7c475a5d4bdd9f68a8f96cfd929951c5776abe6a77ea1b13e5b7b5b4be6c2", kill_on_drop: false }`
[INFO] [stdout] 52d7c475a5d4bdd9f68a8f96cfd929951c5776abe6a77ea1b13e5b7b5b4be6c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7c3a44cf5f95fa5cf164a312bdcf845157af7093" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] a9c83b57a2d7a23ae4385da384ba9d37bc99a58127421ca51343198319c83e6d
[INFO] running `Command { std: "docker" "start" "-a" "a9c83b57a2d7a23ae4385da384ba9d37bc99a58127421ca51343198319c83e6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling libc v0.2.96
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking sysfs-serde v0.2.3
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking usbapi v0.4.2
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking dfu v0.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::slice::Iter`
[INFO] [stdout]  --> src/core.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::slice::Iter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::slice::Iter`
[INFO] [stdout]  --> src/core.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::slice::Iter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/core.rs:162:13
[INFO] [stdout]     |
[INFO] [stdout] 162 |         let mut usb =
[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/core.rs:162:13
[INFO] [stdout]     |
[INFO] [stdout] 162 |         let mut usb =
[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: field is never read: `length`
[INFO] [stdout]   --> src/core.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 |     length: u8,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `descriptor_type`
[INFO] [stdout]   --> src/core.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 |     descriptor_type: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attributes`
[INFO] [stdout]   --> src/core.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     attributes: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `detach_timeout`
[INFO] [stdout]   --> src/core.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     detach_timeout: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dfu_version`
[INFO] [stdout]   --> src/core.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 77 |     dfu_version: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `length`
[INFO] [stdout]   --> src/core.rs:72:5
[INFO] [stdout]    |
[INFO] [stdout] 72 |     length: u8,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `descriptor_type`
[INFO] [stdout]   --> src/core.rs:73:5
[INFO] [stdout]    |
[INFO] [stdout] 73 |     descriptor_type: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `attributes`
[INFO] [stdout]   --> src/core.rs:74:5
[INFO] [stdout]    |
[INFO] [stdout] 74 |     attributes: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `detach_timeout`
[INFO] [stdout]   --> src/core.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     detach_timeout: u16,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dfu_version`
[INFO] [stdout]   --> src/core.rs:77:5
[INFO] [stdout]    |
[INFO] [stdout] 77 |     dfu_version: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.47s
[INFO] running `Command { std: "docker" "inspect" "a9c83b57a2d7a23ae4385da384ba9d37bc99a58127421ca51343198319c83e6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9c83b57a2d7a23ae4385da384ba9d37bc99a58127421ca51343198319c83e6d", kill_on_drop: false }`
[INFO] [stdout] a9c83b57a2d7a23ae4385da384ba9d37bc99a58127421ca51343198319c83e6d