[INFO] cloning repository https://github.com/MercMayhem/serial-monitor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MercMayhem/serial-monitor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMercMayhem%2Fserial-monitor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMercMayhem%2Fserial-monitor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f86dce1c5a0a3982843697fde59f9724a275384e
[INFO] checking MercMayhem/serial-monitor against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMercMayhem%2Fserial-monitor" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MercMayhem/serial-monitor on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MercMayhem/serial-monitor
[INFO] finished tweaking git repo https://github.com/MercMayhem/serial-monitor
[INFO] tweaked toml for git repo https://github.com/MercMayhem/serial-monitor written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MercMayhem/serial-monitor 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thiserror-impl v1.0.56
[INFO] [stderr]   Downloaded thiserror v1.0.56
[INFO] [stderr]   Downloaded unescaper v0.1.3
[INFO] [stderr]   Downloaded libudev-sys v0.1.4
[INFO] [stderr]   Downloaded mach2 v0.4.2
[INFO] [stderr]   Downloaded bitflags v2.4.1
[INFO] [stderr]   Downloaded io-kit-sys v0.4.0
[INFO] [stderr]   Downloaded serialport v4.3.0
[INFO] [stderr]   Downloaded pkg-config v0.3.28
[INFO] [stderr]   Downloaded memchr v2.7.1
[INFO] [stderr]   Downloaded nix v0.26.4
[INFO] [stderr]   Downloaded regex-syntax v0.8.2
[INFO] [stderr]   Downloaded regex-automata v0.4.3
[INFO] [stderr]   Downloaded regex v1.10.2
[INFO] [stderr]   Downloaded libc v0.2.152
[INFO] [stderr]   Downloaded syn v2.0.48
[INFO] [stderr]   Downloaded aho-corasick v1.1.2
[INFO] [stderr]   Downloaded libudev v0.3.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e9454d8596541ebdaa35a03070f38561dc04c2d3feb27f6a4c7ad870edd4b374
[INFO] running `Command { std: "docker" "start" "-a" "e9454d8596541ebdaa35a03070f38561dc04c2d3feb27f6a4c7ad870edd4b374", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9454d8596541ebdaa35a03070f38561dc04c2d3feb27f6a4c7ad870edd4b374", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9454d8596541ebdaa35a03070f38561dc04c2d3feb27f6a4c7ad870edd4b374", kill_on_drop: false }`
[INFO] [stdout] e9454d8596541ebdaa35a03070f38561dc04c2d3feb27f6a4c7ad870edd4b374
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f0c5411f0ec59f552be2e7e7bdb7a0654be767ca01d710f5cd30e666e77b64b
[INFO] running `Command { std: "docker" "start" "-a" "7f0c5411f0ec59f552be2e7e7bdb7a0654be767ca01d710f5cd30e666e77b64b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]    Compiling pkg-config v0.3.28
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking libudev v0.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]     Checking unescaper v0.1.3
[INFO] [stderr]     Checking serialport v4.3.0
[INFO] [stderr]     Checking serial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serialport` is imported redundantly
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serialport;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serialport` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serialport` is imported redundantly
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serialport;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serialport` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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 3.08s
[INFO] running `Command { std: "docker" "inspect" "7f0c5411f0ec59f552be2e7e7bdb7a0654be767ca01d710f5cd30e666e77b64b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f0c5411f0ec59f552be2e7e7bdb7a0654be767ca01d710f5cd30e666e77b64b", kill_on_drop: false }`
[INFO] [stdout] 7f0c5411f0ec59f552be2e7e7bdb7a0654be767ca01d710f5cd30e666e77b64b