[INFO] fetching crate lib_rapid 0.0.20...
[INFO] checking lib_rapid-0.0.20 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate lib_rapid 0.0.20 into /workspace/builds/worker-59/source
[INFO] validating manifest of crates.io crate lib_rapid 0.0.20 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lib_rapid 0.0.20
[INFO] finished tweaking crates.io crate lib_rapid 0.0.20
[INFO] tweaked toml for crates.io crate lib_rapid 0.0.20 written to /workspace/builds/worker-59/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e0a587677d48245b689909719aecd1dd17b8cbd84592cc584af6d39400e3c7e9
[INFO] running `Command { std: "docker" "start" "-a" "e0a587677d48245b689909719aecd1dd17b8cbd84592cc584af6d39400e3c7e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e0a587677d48245b689909719aecd1dd17b8cbd84592cc584af6d39400e3c7e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0a587677d48245b689909719aecd1dd17b8cbd84592cc584af6d39400e3c7e9", kill_on_drop: false }`
[INFO] [stdout] e0a587677d48245b689909719aecd1dd17b8cbd84592cc584af6d39400e3c7e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b59f8559b9eda2877dfb369fcdc91b8eb03a2cdbb38262cb554ebf9874f3afc5
[INFO] running `Command { std: "docker" "start" "-a" "b59f8559b9eda2877dfb369fcdc91b8eb03a2cdbb38262cb554ebf9874f3afc5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking lib_rapid v0.0.20 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]  --> src/unit_tests/tests.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::vec;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]   --> src/unit_tests/tests.rs:70:9
[INFO] [stdout]    |
[INFO] [stdout] 70 |     let s1 = sets::Set::new_subset(&s, |x| x % 2 == 0);
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 [unoptimized + debuginfo] target(s) in 21.42s
[INFO] running `Command { std: "docker" "inspect" "b59f8559b9eda2877dfb369fcdc91b8eb03a2cdbb38262cb554ebf9874f3afc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b59f8559b9eda2877dfb369fcdc91b8eb03a2cdbb38262cb554ebf9874f3afc5", kill_on_drop: false }`
[INFO] [stdout] b59f8559b9eda2877dfb369fcdc91b8eb03a2cdbb38262cb554ebf9874f3afc5