[INFO] fetching crate unionfind 0.2.1...
[INFO] checking unionfind-0.2.1 against master#a3f76a26e045a760bb1163b7eab36872985242d5 for pr-130930
[INFO] extracting crate unionfind 0.2.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate unionfind 0.2.1 on toolchain a3f76a26e045a760bb1163b7eab36872985242d5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate unionfind 0.2.1
[INFO] finished tweaking crates.io crate unionfind 0.2.1
[INFO] tweaked toml for crates.io crate unionfind 0.2.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 762467d89a0265044d6a66444acf44617015484a42ffa6a07d0c24050a894ffd
[INFO] running `Command { std: "docker" "start" "-a" "762467d89a0265044d6a66444acf44617015484a42ffa6a07d0c24050a894ffd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "762467d89a0265044d6a66444acf44617015484a42ffa6a07d0c24050a894ffd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "762467d89a0265044d6a66444acf44617015484a42ffa6a07d0c24050a894ffd", kill_on_drop: false }`
[INFO] [stdout] 762467d89a0265044d6a66444acf44617015484a42ffa6a07d0c24050a894ffd
[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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 01e2cbda22976c7455ed49022ab3d1e002fa5fc869dfbdcb988c37c8ebdfff8c
[INFO] running `Command { std: "docker" "start" "-a" "01e2cbda22976c7455ed49022ab3d1e002fa5fc869dfbdcb988c37c8ebdfff8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling thiserror-impl v1.0.64
[INFO] [stderr]     Checking thiserror v1.0.64
[INFO] [stderr]     Checking unionfind v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `FixedSize` is never constructed
[INFO] [stdout]    --> src/mapping.rs:284:8
[INFO] [stdout]     |
[INFO] [stdout] 284 | struct FixedSize<M>(M);
[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: struct `FixedSize` is never constructed
[INFO] [stdout]    --> src/mapping.rs:284:8
[INFO] [stdout]     |
[INFO] [stdout] 284 | struct FixedSize<M>(M);
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.87s
[INFO] running `Command { std: "docker" "inspect" "01e2cbda22976c7455ed49022ab3d1e002fa5fc869dfbdcb988c37c8ebdfff8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01e2cbda22976c7455ed49022ab3d1e002fa5fc869dfbdcb988c37c8ebdfff8c", kill_on_drop: false }`
[INFO] [stdout] 01e2cbda22976c7455ed49022ab3d1e002fa5fc869dfbdcb988c37c8ebdfff8c