[INFO] cloning repository https://github.com/jam411/blockchain-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jam411/blockchain-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjam411%2Fblockchain-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjam411%2Fblockchain-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4de27b1f0bd51d8e05c6f9310e72721a8628445b
[INFO] checking jam411/blockchain-in-rust against master#18a6d911caba59605eb03db1452848a85d2e5879 for pr-112743
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjam411%2Fblockchain-in-rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jam411/blockchain-in-rust on toolchain 18a6d911caba59605eb03db1452848a85d2e5879
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jam411/blockchain-in-rust
[INFO] finished tweaking git repo https://github.com/jam411/blockchain-in-rust
[INFO] tweaked toml for git repo https://github.com/jam411/blockchain-in-rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jam411/blockchain-in-rust 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" "+18a6d911caba59605eb03db1452848a85d2e5879" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab831b150b27e79449e212ff02509b30fecf1b335c6dfb8460618c340fda75e7
[INFO] running `Command { std: "docker" "start" "-a" "ab831b150b27e79449e212ff02509b30fecf1b335c6dfb8460618c340fda75e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab831b150b27e79449e212ff02509b30fecf1b335c6dfb8460618c340fda75e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab831b150b27e79449e212ff02509b30fecf1b335c6dfb8460618c340fda75e7", kill_on_drop: false }`
[INFO] [stdout] ab831b150b27e79449e212ff02509b30fecf1b335c6dfb8460618c340fda75e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+18a6d911caba59605eb03db1452848a85d2e5879" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 532a75a9f516cd2e81f6e1c2b14c50617bcce3ee98beabddfc10d69cc430760d
[INFO] running `Command { std: "docker" "start" "-a" "532a75a9f516cd2e81f6e1c2b14c50617bcce3ee98beabddfc10d69cc430760d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling openssl v0.10.40
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]    Compiling openssl-sys v0.9.74
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]     Checking crypto-hash v0.3.4
[INFO] [stderr]     Checking blockchain-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `nonce`
[INFO] [stdout]   --> src/block.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         nonce: u64,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_nonce`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nonce`
[INFO] [stdout]   --> src/block.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |         nonce: u64,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_nonce`
[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 7.56s
[INFO] running `Command { std: "docker" "inspect" "532a75a9f516cd2e81f6e1c2b14c50617bcce3ee98beabddfc10d69cc430760d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "532a75a9f516cd2e81f6e1c2b14c50617bcce3ee98beabddfc10d69cc430760d", kill_on_drop: false }`
[INFO] [stdout] 532a75a9f516cd2e81f6e1c2b14c50617bcce3ee98beabddfc10d69cc430760d