[INFO] fetching crate lib 0.0.2-build...
[INFO] checking lib-0.0.2-build against master#bbe853615821442ef11d6cd42a30a73432b38d89 for pr-154205
[INFO] extracting crate lib 0.0.2-build into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate lib 0.0.2-build
[INFO] finished tweaking crates.io crate lib 0.0.2-build
[INFO] tweaked toml for crates.io crate lib 0.0.2-build written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lib 0.0.2-build on toolchain bbe853615821442ef11d6cd42a30a73432b38d89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate lib 0.0.2-build 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" "+bbe853615821442ef11d6cd42a30a73432b38d89" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d1909c09efe55d65be46b75f25de0eea3d2834c67f68600037e270708a5d231
[INFO] running `Command { std: "docker" "start" "-a" "6d1909c09efe55d65be46b75f25de0eea3d2834c67f68600037e270708a5d231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d1909c09efe55d65be46b75f25de0eea3d2834c67f68600037e270708a5d231", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d1909c09efe55d65be46b75f25de0eea3d2834c67f68600037e270708a5d231", kill_on_drop: false }`
[INFO] [stdout] 6d1909c09efe55d65be46b75f25de0eea3d2834c67f68600037e270708a5d231
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f77415d55584cb22d705447591375a8d2b97b79123d917ad18d0a1ec12ccebe3
[INFO] running `Command { std: "docker" "start" "-a" "f77415d55584cb22d705447591375a8d2b97b79123d917ad18d0a1ec12ccebe3", kill_on_drop: false }`
[INFO] [stderr]     Checking lib v0.0.2-build (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::containers::ord_wrap::Ordered`
[INFO] [stdout]  --> src/containers/interval_set.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::containers::ord_wrap::Ordered;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/math/digits.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |             digits.append((value % max_digit as u64) as u8);
[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] 120 |             let _ = digits.append((value % max_digit as u64) as u8);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/math/digits.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |             digits.append((value % max_digit as u64) as u8);
[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] 120 |             let _ = digits.append((value % max_digit as u64) as u8);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "f77415d55584cb22d705447591375a8d2b97b79123d917ad18d0a1ec12ccebe3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f77415d55584cb22d705447591375a8d2b97b79123d917ad18d0a1ec12ccebe3", kill_on_drop: false }`
[INFO] [stdout] f77415d55584cb22d705447591375a8d2b97b79123d917ad18d0a1ec12ccebe3