[INFO] cloning repository https://github.com/stestagg/escpos-embedded
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stestagg/escpos-embedded" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstestagg%2Fescpos-embedded", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstestagg%2Fescpos-embedded'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56e498200a81ac09bf2c7c3a7d27834650b88982
[INFO] checking stestagg/escpos-embedded against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstestagg%2Fescpos-embedded" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/stestagg/escpos-embedded
[INFO] finished tweaking git repo https://github.com/stestagg/escpos-embedded
[INFO] tweaked toml for git repo https://github.com/stestagg/escpos-embedded written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/stestagg/escpos-embedded on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/stestagg/escpos-embedded already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e1d6783fe5b7d8a480eae98d9c18882bff70d56ca4f86bd4f5c553d14d515cd
[INFO] running `Command { std: "docker" "start" "-a" "4e1d6783fe5b7d8a480eae98d9c18882bff70d56ca4f86bd4f5c553d14d515cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e1d6783fe5b7d8a480eae98d9c18882bff70d56ca4f86bd4f5c553d14d515cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e1d6783fe5b7d8a480eae98d9c18882bff70d56ca4f86bd4f5c553d14d515cd", kill_on_drop: false }`
[INFO] [stdout] 4e1d6783fe5b7d8a480eae98d9c18882bff70d56ca4f86bd4f5c553d14d515cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ab54c67ee240cfdc1d180191a58f87cdbe6034184c6adb55fa87036e2cd76e0
[INFO] running `Command { std: "docker" "start" "-a" "3ab54c67ee240cfdc1d180191a58f87cdbe6034184c6adb55fa87036e2cd76e0", kill_on_drop: false }`
[INFO] [stderr]     Checking escpos-embedded v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]    --> src/lib.rs:520:9
[INFO] [stdout]     |
[INFO] [stdout] 520 |     use std::vec;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitedMockTransport` is never constructed
[INFO] [stdout]    --> src/lib.rs:553:12
[INFO] [stdout]     |
[INFO] [stdout] 553 |     struct LimitedMockTransport {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/lib.rs:559:12
[INFO] [stdout]     |
[INFO] [stdout] 558 |     impl LimitedMockTransport {
[INFO] [stdout]     |     ------------------------- associated function in this implementation
[INFO] [stdout] 559 |         fn new(max: usize) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "3ab54c67ee240cfdc1d180191a58f87cdbe6034184c6adb55fa87036e2cd76e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ab54c67ee240cfdc1d180191a58f87cdbe6034184c6adb55fa87036e2cd76e0", kill_on_drop: false }`
[INFO] [stdout] 3ab54c67ee240cfdc1d180191a58f87cdbe6034184c6adb55fa87036e2cd76e0