[INFO] fetching crate usbd-ethernet 0.1.2...
[INFO] checking usbd-ethernet-0.1.2 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate usbd-ethernet 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate usbd-ethernet 0.1.2 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate usbd-ethernet 0.1.2
[INFO] finished tweaking crates.io crate usbd-ethernet 0.1.2
[INFO] tweaked toml for crates.io crate usbd-ethernet 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 30 packages to latest compatible versions
[INFO] [stderr]       Adding bitflags v1.3.2 (available: v2.6.0)
[INFO] [stderr]       Adding hash32 v0.2.1 (available: v0.3.1)
[INFO] [stderr]       Adding heapless v0.7.17 (available: v0.8.0)
[INFO] [stderr]       Adding smoltcp v0.9.1 (available: v0.11.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[INFO] [stderr]       Adding usb-device v0.2.9 (available: v0.3.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc8b7892bd5df75dc479cb1ec6ae643a1ab0542db3f5ce2a8c3023d1dc56456e
[INFO] running `Command { std: "docker" "start" "-a" "fc8b7892bd5df75dc479cb1ec6ae643a1ab0542db3f5ce2a8c3023d1dc56456e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc8b7892bd5df75dc479cb1ec6ae643a1ab0542db3f5ce2a8c3023d1dc56456e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc8b7892bd5df75dc479cb1ec6ae643a1ab0542db3f5ce2a8c3023d1dc56456e", kill_on_drop: false }`
[INFO] [stdout] fc8b7892bd5df75dc479cb1ec6ae643a1ab0542db3f5ce2a8c3023d1dc56456e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12e54e878c35ddff598d5190bda0468501e24e050fd14ed1654bd434ae05797c
[INFO] running `Command { std: "docker" "start" "-a" "12e54e878c35ddff598d5190bda0468501e24e050fd14ed1654bd434ae05797c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling defmt v0.3.8
[INFO] [stderr]    Compiling defmt-macros v0.3.9
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling smoltcp v0.9.1
[INFO] [stderr]     Checking managed v0.8.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling semver v1.0.23
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]    Compiling thiserror-impl v1.0.64
[INFO] [stderr]    Compiling thiserror v1.0.64
[INFO] [stderr]    Compiling defmt-parser v0.3.4
[INFO] [stderr]     Checking usb-device v0.2.9
[INFO] [stderr]     Checking usbd-ethernet v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `get_u8` is never used
[INFO] [stdout]   --> src/bytes.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub(crate) trait Buf {
[INFO] [stdout]    |                  --- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn get_u8(&mut self) -> Option<u8> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_u8` is never used
[INFO] [stdout]   --> src/bytes.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub(crate) trait Buf {
[INFO] [stdout]    |                  --- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 36 |     fn get_u8(&mut self) -> Option<u8> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.39s
[INFO] running `Command { std: "docker" "inspect" "12e54e878c35ddff598d5190bda0468501e24e050fd14ed1654bd434ae05797c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12e54e878c35ddff598d5190bda0468501e24e050fd14ed1654bd434ae05797c", kill_on_drop: false }`
[INFO] [stdout] 12e54e878c35ddff598d5190bda0468501e24e050fd14ed1654bd434ae05797c