[INFO] fetching crate dot-canvas 0.1.1...
[INFO] checking dot-canvas-0.1.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate dot-canvas 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate dot-canvas 0.1.1
[INFO] finished tweaking crates.io crate dot-canvas 0.1.1
[INFO] tweaked toml for crates.io crate dot-canvas 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dot-canvas 0.1.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c9556ebc13d1527d9483669ed5a889ab86354fd06655381cb34a56d53db8301b
[INFO] running `Command { std: "docker" "start" "-a" "c9556ebc13d1527d9483669ed5a889ab86354fd06655381cb34a56d53db8301b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c9556ebc13d1527d9483669ed5a889ab86354fd06655381cb34a56d53db8301b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9556ebc13d1527d9483669ed5a889ab86354fd06655381cb34a56d53db8301b", kill_on_drop: false }`
[INFO] [stdout] c9556ebc13d1527d9483669ed5a889ab86354fd06655381cb34a56d53db8301b
[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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f735dfa3628d6a1ecd37b863d13af9d20509dd28926f3d9bc1afbc70ef703516
[INFO] running `Command { std: "docker" "start" "-a" "f735dfa3628d6a1ecd37b863d13af9d20509dd28926f3d9bc1afbc70ef703516", kill_on_drop: false }`
[INFO] [stderr]     Checking dot-canvas v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Dot` is never constructed
[INFO] [stdout]  --> src/shape.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Dot {
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dot-canvas` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `Dot` is never constructed
[INFO] [stdout]  --> src/shape.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Dot {
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(dead_code)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dot-canvas` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f735dfa3628d6a1ecd37b863d13af9d20509dd28926f3d9bc1afbc70ef703516", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f735dfa3628d6a1ecd37b863d13af9d20509dd28926f3d9bc1afbc70ef703516", kill_on_drop: false }`
[INFO] [stdout] f735dfa3628d6a1ecd37b863d13af9d20509dd28926f3d9bc1afbc70ef703516