[INFO] cloning repository https://github.com/swordsmanluke/countdown
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/swordsmanluke/countdown" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswordsmanluke%2Fcountdown", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswordsmanluke%2Fcountdown'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ce2ed9cc8fcbd4e0990fefe5a4f2d28f3aaa578
[INFO] checking swordsmanluke/countdown against master#bca37a20bd376ce3fd138e7cdee7fe704e0f8814 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswordsmanluke%2Fcountdown" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/swordsmanluke/countdown
[INFO] finished tweaking git repo https://github.com/swordsmanluke/countdown
[INFO] tweaked toml for git repo https://github.com/swordsmanluke/countdown written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/swordsmanluke/countdown on toolchain bca37a20bd376ce3fd138e7cdee7fe704e0f8814
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/swordsmanluke/countdown 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" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be0a9a6a435d2cfcf4685b8611a68fc862e2506eb0c0ae88cc5424b59247ac7a
[INFO] running `Command { std: "docker" "start" "-a" "be0a9a6a435d2cfcf4685b8611a68fc862e2506eb0c0ae88cc5424b59247ac7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be0a9a6a435d2cfcf4685b8611a68fc862e2506eb0c0ae88cc5424b59247ac7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be0a9a6a435d2cfcf4685b8611a68fc862e2506eb0c0ae88cc5424b59247ac7a", kill_on_drop: false }`
[INFO] [stdout] be0a9a6a435d2cfcf4685b8611a68fc862e2506eb0c0ae88cc5424b59247ac7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+bca37a20bd376ce3fd138e7cdee7fe704e0f8814" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28b44d31a791422a6bb111dc37e50be6ccd73e77ab474aadf0c4dacb70f497e1
[INFO] running `Command { std: "docker" "start" "-a" "28b44d31a791422a6bb111dc37e50be6ccd73e77ab474aadf0c4dacb70f497e1", kill_on_drop: false }`
[INFO] [stderr]     Checking countdown v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `SaveError` is never constructed
[INFO] [stdout]  --> src/countdown/countdown_serializer.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum CountdownError {
[INFO] [stdout]   |          -------------- variant in this enum
[INFO] [stdout] 8 |     NotFound(String),
[INFO] [stdout] 9 |     SaveError(String),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CountdownError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |         ctr.add_timer(name, duration);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 230 |         let _ = ctr.add_timer(name, duration);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:241:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |         ctr.add_timer(name, duration);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 241 |         let _ = ctr.add_timer(name, duration);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 244 |         ctr.cancel_timer(name);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 244 |         let _ = ctr.cancel_timer(name);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/countdown.rs:254:9
[INFO] [stdout]     |
[INFO] [stdout] 254 |         ctr.add_timer(name, duration);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 254 |         let _ = ctr.add_timer(name, duration);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `timers` is never used
[INFO] [stdout]    --> src/countdown.rs:131:12
[INFO] [stdout]     |
[INFO] [stdout] 119 | impl Counterdowner {
[INFO] [stdout]     | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 131 |     pub fn timers(&mut self) -> Vec<String> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `NotFound` and `SaveError` are never constructed
[INFO] [stdout]  --> src/countdown/countdown_serializer.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum CountdownError {
[INFO] [stdout]   |          -------------- variants in this enum
[INFO] [stdout] 8 |     NotFound(String),
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 9 |     SaveError(String),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CountdownError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "28b44d31a791422a6bb111dc37e50be6ccd73e77ab474aadf0c4dacb70f497e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28b44d31a791422a6bb111dc37e50be6ccd73e77ab474aadf0c4dacb70f497e1", kill_on_drop: false }`
[INFO] [stdout] 28b44d31a791422a6bb111dc37e50be6ccd73e77ab474aadf0c4dacb70f497e1
