[INFO] cloning repository https://github.com/otdavies/rust_shared_utilties
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/otdavies/rust_shared_utilties" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fotdavies%2Frust_shared_utilties", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fotdavies%2Frust_shared_utilties'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ebadd6a142c4566e849462e5002d4422b7c08b8e
[INFO] checking otdavies/rust_shared_utilties against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fotdavies%2Frust_shared_utilties" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/otdavies/rust_shared_utilties on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/otdavies/rust_shared_utilties
[INFO] finished tweaking git repo https://github.com/otdavies/rust_shared_utilties
[INFO] tweaked toml for git repo https://github.com/otdavies/rust_shared_utilties written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/otdavies/rust_shared_utilties 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 121d1596c3b2d6f2d35fce81396374ff81de1bdadbd0ec20cab35156a543417f
[INFO] running `Command { std: "docker" "start" "-a" "121d1596c3b2d6f2d35fce81396374ff81de1bdadbd0ec20cab35156a543417f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "121d1596c3b2d6f2d35fce81396374ff81de1bdadbd0ec20cab35156a543417f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "121d1596c3b2d6f2d35fce81396374ff81de1bdadbd0ec20cab35156a543417f", kill_on_drop: false }`
[INFO] [stdout] 121d1596c3b2d6f2d35fce81396374ff81de1bdadbd0ec20cab35156a543417f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51cce6bee4e4146aeec3f680e037871bcace0f5096c7bbf4a3de2ad6e61f431e
[INFO] running `Command { std: "docker" "start" "-a" "51cce6bee4e4146aeec3f680e037871bcace0f5096c7bbf4a3de2ad6e61f431e", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_shared_utilities v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `unsubscribe` is never used
[INFO] [stdout]   --> src/patterns/observer.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub trait IListen<'a, T> {
[INFO] [stdout]    |           ------- method in this trait
[INFO] [stdout] 20 |     fn subscribe(&mut self, observer: impl IObserve<T> + 'a);
[INFO] [stdout] 21 |     fn unsubscribe(&mut self, observer: impl IObserve<T> + 'a);
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `unsubscribe` is never used
[INFO] [stdout]   --> src/patterns/observer.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub trait IListen<'a, T> {
[INFO] [stdout]    |           ------- method in this trait
[INFO] [stdout] 20 |     fn subscribe(&mut self, observer: impl IObserve<T> + 'a);
[INFO] [stdout] 21 |     fn unsubscribe(&mut self, observer: impl IObserve<T> + 'a);
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "51cce6bee4e4146aeec3f680e037871bcace0f5096c7bbf4a3de2ad6e61f431e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51cce6bee4e4146aeec3f680e037871bcace0f5096c7bbf4a3de2ad6e61f431e", kill_on_drop: false }`
[INFO] [stdout] 51cce6bee4e4146aeec3f680e037871bcace0f5096c7bbf4a3de2ad6e61f431e