[INFO] cloning repository https://github.com/FiveDomain/mini-blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/FiveDomain/mini-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFiveDomain%2Fmini-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFiveDomain%2Fmini-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23a2c25bfce97ea6956cf67d90652088840ebafd
[INFO] checking FiveDomain/mini-blockchain against master#80ed61fbd64936ed676c2050e7e660b5ad78c9f2 for pr-100555
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FFiveDomain%2Fmini-blockchain" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/FiveDomain/mini-blockchain on toolchain 80ed61fbd64936ed676c2050e7e660b5ad78c9f2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+80ed61fbd64936ed676c2050e7e660b5ad78c9f2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/FiveDomain/mini-blockchain
[INFO] finished tweaking git repo https://github.com/FiveDomain/mini-blockchain
[INFO] tweaked toml for git repo https://github.com/FiveDomain/mini-blockchain written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/FiveDomain/mini-blockchain already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+80ed61fbd64936ed676c2050e7e660b5ad78c9f2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+80ed61fbd64936ed676c2050e7e660b5ad78c9f2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3abc21dc34792ba5935c1613ec609774fb7eb8c53f47e628795c02291be5d9d6
[INFO] running `Command { std: "docker" "start" "-a" "3abc21dc34792ba5935c1613ec609774fb7eb8c53f47e628795c02291be5d9d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3abc21dc34792ba5935c1613ec609774fb7eb8c53f47e628795c02291be5d9d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3abc21dc34792ba5935c1613ec609774fb7eb8c53f47e628795c02291be5d9d6", kill_on_drop: false }`
[INFO] [stdout] 3abc21dc34792ba5935c1613ec609774fb7eb8c53f47e628795c02291be5d9d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:824c28ce115f6b999260af6986f3384c158e782489540e41c0b698ca1d9fd927" "/opt/rustwide/cargo-home/bin/cargo" "+80ed61fbd64936ed676c2050e7e660b5ad78c9f2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e0acb66423a2fb563c548943a5c75e6c085e37994fc7aa8dd4b58c9df3268b8
[INFO] running `Command { std: "docker" "start" "-a" "2e0acb66423a2fb563c548943a5c75e6c085e37994fc7aa8dd4b58c9df3268b8", kill_on_drop: false }`
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[INFO] [stdout] warning: fields `time_stamp`, `data` and `prev_hash` are never read
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Block {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 12 |     time_stamp: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 13 |     data: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     hash: String,
[INFO] [stdout] 15 |     prev_hash: String,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: `Block` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `time_stamp`, `data` and `prev_hash` are never read
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Block {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 12 |     time_stamp: String,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 13 |     data: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 14 |     hash: String,
[INFO] [stdout] 15 |     prev_hash: String,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: `Block` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[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 59.07s
[INFO] running `Command { std: "docker" "inspect" "2e0acb66423a2fb563c548943a5c75e6c085e37994fc7aa8dd4b58c9df3268b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e0acb66423a2fb563c548943a5c75e6c085e37994fc7aa8dd4b58c9df3268b8", kill_on_drop: false }`
[INFO] [stdout] 2e0acb66423a2fb563c548943a5c75e6c085e37994fc7aa8dd4b58c9df3268b8