[INFO] cloning repository https://github.com/samuel-skean/CS_454_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/samuel-skean/CS_454_Blockchain_in_Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuel-skean%2FCS_454_Blockchain_in_Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuel-skean%2FCS_454_Blockchain_in_Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 68c1b359758d49bd49f6843813a5d6c2f88c4661
[INFO] checking samuel-skean/CS_454_Blockchain_in_Rust against master#667247db71ea18c4130dd018d060e7f09d589490 for pr-140824
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuel-skean%2FCS_454_Blockchain_in_Rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samuel-skean/CS_454_Blockchain_in_Rust on toolchain 667247db71ea18c4130dd018d060e7f09d589490
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/samuel-skean/CS_454_Blockchain_in_Rust
[INFO] finished tweaking git repo https://github.com/samuel-skean/CS_454_Blockchain_in_Rust
[INFO] tweaked toml for git repo https://github.com/samuel-skean/CS_454_Blockchain_in_Rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/samuel-skean/CS_454_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" "+667247db71ea18c4130dd018d060e7f09d589490" "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-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 164e31f3ee0317235ee00a402015c19e536e7d1ba6a3e1a4840ac0a9ba9d0145
[INFO] running `Command { std: "docker" "start" "-a" "164e31f3ee0317235ee00a402015c19e536e7d1ba6a3e1a4840ac0a9ba9d0145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "164e31f3ee0317235ee00a402015c19e536e7d1ba6a3e1a4840ac0a9ba9d0145", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "164e31f3ee0317235ee00a402015c19e536e7d1ba6a3e1a4840ac0a9ba9d0145", kill_on_drop: false }`
[INFO] [stdout] 164e31f3ee0317235ee00a402015c19e536e7d1ba6a3e1a4840ac0a9ba9d0145
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+667247db71ea18c4130dd018d060e7f09d589490" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dce0e85a81b83c7b0455ee45ec0091a7eb711a253a22ed64b66c1fa28492da9
[INFO] running `Command { std: "docker" "start" "-a" "3dce0e85a81b83c7b0455ee45ec0091a7eb711a253a22ed64b66c1fa28492da9", kill_on_drop: false }`
[INFO] [stderr]     Checking cs-454-blockchain-in-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `wallet`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:59:32
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn pay_rent(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_wallet`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:59:57
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn pay_rent(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wallet`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:63:36
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn redeem_coins(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_wallet`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:63:61
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn redeem_coins(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wallet`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:59:32
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn pay_rent(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_wallet`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:59:57
[INFO] [stdout]    |
[INFO] [stdout] 59 |     pub fn pay_rent(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wallet`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:63:36
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn redeem_coins(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                    ^^^^^^ help: if this is intentional, prefix it with an underscore: `_wallet`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coins`
[INFO] [stdout]   --> src/solution/blockchain_solution.rs:63:61
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn redeem_coins(&mut self, wallet: &WalletSolution, coins: &HashSet<Rc<CoinSolution>>) -> bool {
[INFO] [stdout]    |                                                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_coins`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "3dce0e85a81b83c7b0455ee45ec0091a7eb711a253a22ed64b66c1fa28492da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dce0e85a81b83c7b0455ee45ec0091a7eb711a253a22ed64b66c1fa28492da9", kill_on_drop: false }`
[INFO] [stdout] 3dce0e85a81b83c7b0455ee45ec0091a7eb711a253a22ed64b66c1fa28492da9