[INFO] fetching crate serialstudio 0.1.1...
[INFO] checking serialstudio-0.1.1 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate serialstudio 0.1.1 into /workspace/builds/worker-7-tc2/source
[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-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serialstudio 0.1.1 on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate serialstudio 0.1.1 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ebc2c1852fa97622c28bf2aa5fa84afb7060cdb33b0486fdca22109f65b0cb03
[INFO] running `Command { std: "docker" "start" "-a" "ebc2c1852fa97622c28bf2aa5fa84afb7060cdb33b0486fdca22109f65b0cb03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ebc2c1852fa97622c28bf2aa5fa84afb7060cdb33b0486fdca22109f65b0cb03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebc2c1852fa97622c28bf2aa5fa84afb7060cdb33b0486fdca22109f65b0cb03", kill_on_drop: false }`
[INFO] [stdout] ebc2c1852fa97622c28bf2aa5fa84afb7060cdb33b0486fdca22109f65b0cb03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f70cc733b8670cec8c7a1131266c6a80c9f3b763a31578fa320d4ddbf5ffd70a
[INFO] running `Command { std: "docker" "start" "-a" "f70cc733b8670cec8c7a1131266c6a80c9f3b763a31578fa320d4ddbf5ffd70a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking serialstudio v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Dashboard` is never constructed
[INFO] [stdout]   --> src/friendly.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Dashboard {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_group` is never used
[INFO] [stdout]  --> src/friendly.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | trait Widget {
[INFO] [stdout]   |       ------ method in this trait
[INFO] [stdout] 8 |     fn get_group(&self) -> DataGroup;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `graph` are never read
[INFO] [stdout]   --> src/friendly.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct MapWidget {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     graph: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `widgets` are never read
[INFO] [stdout]   --> src/friendly.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Dashboard {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 63 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 64 |     widgets: Vec<Box<dyn Widget>>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Dashboard` is never constructed
[INFO] [stdout]   --> src/friendly.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Dashboard {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_group` is never used
[INFO] [stdout]  --> src/friendly.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | trait Widget {
[INFO] [stdout]   |       ------ method in this trait
[INFO] [stdout] 8 |     fn get_group(&self) -> DataGroup;
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `graph` are never read
[INFO] [stdout]   --> src/friendly.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct MapWidget {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     graph: bool,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `widgets` are never read
[INFO] [stdout]   --> src/friendly.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | pub struct Dashboard {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 63 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 64 |     widgets: Vec<Box<dyn Widget>>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `serialstudio` (lib) due to 1 previous error; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `serialstudio` (lib test) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f70cc733b8670cec8c7a1131266c6a80c9f3b763a31578fa320d4ddbf5ffd70a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f70cc733b8670cec8c7a1131266c6a80c9f3b763a31578fa320d4ddbf5ffd70a", kill_on_drop: false }`
[INFO] [stdout] f70cc733b8670cec8c7a1131266c6a80c9f3b763a31578fa320d4ddbf5ffd70a
