[INFO] fetching crate serialstudio 0.1.1...
[INFO] checking serialstudio-0.1.1 against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] extracting crate serialstudio 0.1.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate serialstudio 0.1.1 on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serialstudio 0.1.1
[INFO] finished tweaking crates.io crate serialstudio 0.1.1
[INFO] tweaked toml for crates.io crate serialstudio 0.1.1 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate crates.io crate serialstudio 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07121c2194b67654948e645bbd6c7188f58c13dd25a74131b37bd85054ee3e66
[INFO] running `Command { std: "docker" "start" "-a" "07121c2194b67654948e645bbd6c7188f58c13dd25a74131b37bd85054ee3e66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07121c2194b67654948e645bbd6c7188f58c13dd25a74131b37bd85054ee3e66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07121c2194b67654948e645bbd6c7188f58c13dd25a74131b37bd85054ee3e66", kill_on_drop: false }`
[INFO] [stdout] 07121c2194b67654948e645bbd6c7188f58c13dd25a74131b37bd85054ee3e66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+fc81ad22c453776de16acf9938976930cf8c9401" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd63b580e7f313b34cdb54fde4c882bc3ae2179a692bb7acebea187fa8e3cfcb
[INFO] running `Command { std: "docker" "start" "-a" "bd63b580e7f313b34cdb54fde4c882bc3ae2179a692bb7acebea187fa8e3cfcb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]     Checking serialstudio v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/friendly.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `widgets`
[INFO] [stdout]   --> src/friendly.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     widgets: Vec<Box<dyn Widget>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/friendly.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `widgets`
[INFO] [stdout]   --> src/friendly.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     widgets: Vec<Box<dyn Widget>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `WidgetSubType`
[INFO] [stdout]  --> examples/random.rs:3:48
[INFO] [stdout]   |
[INFO] [stdout] 3 |     data::{DataGroup, DataSet, TelemetryFrame, WidgetSubType},
[INFO] [stdout]   |                                                ^^^^^^^^^^^^^
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.30s
[INFO] running `Command { std: "docker" "inspect" "bd63b580e7f313b34cdb54fde4c882bc3ae2179a692bb7acebea187fa8e3cfcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd63b580e7f313b34cdb54fde4c882bc3ae2179a692bb7acebea187fa8e3cfcb", kill_on_drop: false }`
[INFO] [stdout] bd63b580e7f313b34cdb54fde4c882bc3ae2179a692bb7acebea187fa8e3cfcb