[INFO] fetching crate poloto-chrono 0.4.0...
[INFO] building poloto-chrono-0.4.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate poloto-chrono 0.4.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate poloto-chrono 0.4.0
[INFO] finished tweaking crates.io crate poloto-chrono 0.4.0
[INFO] tweaked toml for crates.io crate poloto-chrono 0.4.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate poloto-chrono 0.4.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate poloto-chrono 0.4.0 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.29
[INFO] [stderr]   Downloaded time v0.1.45
[INFO] [stderr]   Downloaded tagu v0.1.0
[INFO] [stderr]   Downloaded log v0.4.19
[INFO] [stderr]   Downloaded proc-macro2 v1.0.63
[INFO] [stderr]   Downloaded cc v1.0.79
[INFO] [stderr]   Downloaded poloto v19.1.0
[INFO] [stderr]   Downloaded chrono v0.4.26
[INFO] [stderr]   Downloaded syn v2.0.23
[INFO] [stderr]   Downloaded libc v0.2.147
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 19ce1562f08025d1d33c9f3498e074e8dc410ac1a1222e94efec461c07c5fdc4
[INFO] running `Command { std: "docker" "start" "-a" "19ce1562f08025d1d33c9f3498e074e8dc410ac1a1222e94efec461c07c5fdc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19ce1562f08025d1d33c9f3498e074e8dc410ac1a1222e94efec461c07c5fdc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19ce1562f08025d1d33c9f3498e074e8dc410ac1a1222e94efec461c07c5fdc4", kill_on_drop: false }`
[INFO] [stdout] 19ce1562f08025d1d33c9f3498e074e8dc410ac1a1222e94efec461c07c5fdc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5c5235a40eeecdb5e89b61585340a42e5aebdd780b2400d4832f80c8730bffe
[INFO] running `Command { std: "docker" "start" "-a" "b5c5235a40eeecdb5e89b61585340a42e5aebdd780b2400d4832f80c8730bffe", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling iana-time-zone v0.1.57
[INFO] [stderr]    Compiling tagu v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling poloto v19.1.0
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling chrono v0.4.26
[INFO] [stderr]    Compiling poloto-chrono v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `chosen_tick` is never read
[INFO] [stdout]   --> src/tick_finder.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Candidate {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub chosen_tick: i64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Candidate` 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.41s
[INFO] running `Command { std: "docker" "inspect" "b5c5235a40eeecdb5e89b61585340a42e5aebdd780b2400d4832f80c8730bffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5c5235a40eeecdb5e89b61585340a42e5aebdd780b2400d4832f80c8730bffe", kill_on_drop: false }`
[INFO] [stdout] b5c5235a40eeecdb5e89b61585340a42e5aebdd780b2400d4832f80c8730bffe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19884ee3c58ceb77fccea5d69972a29f0418db612ca99be97ab52f7062501884
[INFO] running `Command { std: "docker" "start" "-a" "19884ee3c58ceb77fccea5d69972a29f0418db612ca99be97ab52f7062501884", kill_on_drop: false }`
[INFO] [stderr]    Compiling poloto-chrono v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `chosen_tick` is never read
[INFO] [stdout]   --> src/tick_finder.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Candidate {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub chosen_tick: i64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Candidate` 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: field `chosen_tick` is never read
[INFO] [stdout]   --> src/tick_finder.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Candidate {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub chosen_tick: i64,
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Candidate` 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "19884ee3c58ceb77fccea5d69972a29f0418db612ca99be97ab52f7062501884", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19884ee3c58ceb77fccea5d69972a29f0418db612ca99be97ab52f7062501884", kill_on_drop: false }`
[INFO] [stdout] 19884ee3c58ceb77fccea5d69972a29f0418db612ca99be97ab52f7062501884