[INFO] cloning repository https://github.com/gregoriB/blockchain-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gregoriB/blockchain-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FgregoriB%2Fblockchain-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FgregoriB%2Fblockchain-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 43c8845bd3885ef6f23f37f1c2ed2f797becc193
[INFO] testing gregoriB/blockchain-Rust against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FgregoriB%2Fblockchain-Rust" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gregoriB/blockchain-Rust on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gregoriB/blockchain-Rust
[INFO] finished tweaking git repo https://github.com/gregoriB/blockchain-Rust
[INFO] tweaked toml for git repo https://github.com/gregoriB/blockchain-Rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/gregoriB/blockchain-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3f7067fb8b9ff24cc6108ec5af7fc324cf84f81294eb5b1e7509584ed974fb9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b3f7067fb8b9ff24cc6108ec5af7fc324cf84f81294eb5b1e7509584ed974fb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3f7067fb8b9ff24cc6108ec5af7fc324cf84f81294eb5b1e7509584ed974fb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3f7067fb8b9ff24cc6108ec5af7fc324cf84f81294eb5b1e7509584ed974fb9", kill_on_drop: false }`
[INFO] [stdout] b3f7067fb8b9ff24cc6108ec5af7fc324cf84f81294eb5b1e7509584ed974fb9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5c873374a81a4c6154762e8ced961a3e40113c687bf92023cb2b06d7991ac3f6
[INFO] running `Command { std: "docker" "start" "-a" "5c873374a81a4c6154762e8ced961a3e40113c687bf92023cb2b06d7991ac3f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.3.1
[INFO] [stderr]    Compiling openssl-sys v0.9.65
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling openssl v0.10.35
[INFO] [stderr]    Compiling crypto-hash v0.3.4
[INFO] [stderr]    Compiling block_chain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `pending_transactions`
[INFO] [stdout]  --> src/blockchain.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pending_transactions: Vec<Transaction>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_chain`
[INFO] [stdout]   --> src/blockchain.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_chain(&self) -> Vec<Block> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_pending_transactions`
[INFO] [stdout]   --> src/blockchain.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn get_pending_transactions(&self) -> Vec<Transaction> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_last_block`
[INFO] [stdout]   --> src/blockchain.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn get_last_block(&self) -> Block {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_block`
[INFO] [stdout]   --> src/blockchain.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn create_block(&self) -> Block {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_block`
[INFO] [stdout]   --> src/blockchain.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn add_block(&mut self, payout_address: &'static str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_chain`
[INFO] [stdout]   --> src/blockchain.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 |     fn update_chain(&mut self, last_block: Block, new_block: Block) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pay_miner`
[INFO] [stdout]   --> src/blockchain.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn pay_miner(&mut self, payout_address: &'static str) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_payout_transaction`
[INFO] [stdout]   --> src/blockchain.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn create_payout_transaction(&self, payout_address: &'static str) -> Transaction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset_pending_transactions`
[INFO] [stdout]   --> src/blockchain.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn reset_pending_transactions(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_pending_transaction`
[INFO] [stdout]    --> src/blockchain.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn add_pending_transaction(&mut self, transaction: Transaction) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `transactions`
[INFO] [stdout]  --> src/block.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     transactions: Vec<Transaction>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Block` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/block.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Debug, Clone)]
[INFO] [stdout]   |          ^^^^^  ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_transactions`
[INFO] [stdout]   --> src/block.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn get_transactions(&self) -> Vec<Transaction> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hash`
[INFO] [stdout]   --> src/block.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_prev_hash`
[INFO] [stdout]   --> src/block.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_prev_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_next_hash`
[INFO] [stdout]   --> src/block.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn get_next_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_prev_hash`
[INFO] [stdout]   --> src/block.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn set_prev_hash(&mut self, hash: &str) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_next_hash`
[INFO] [stdout]   --> src/block.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn set_next_hash(&mut self, hash: &str) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mine`
[INFO] [stdout]   --> src/block.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn mine(&mut self, difficulty: usize) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hash`
[INFO] [stdout]   --> src/transaction.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn get_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_sender`
[INFO] [stdout]   --> src/transaction.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn get_sender(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_receiver`
[INFO] [stdout]   --> src/transaction.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_receiver(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_amount`
[INFO] [stdout]   --> src/transaction.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_amount(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.68s
[INFO] running `Command { std: "docker" "inspect" "5c873374a81a4c6154762e8ced961a3e40113c687bf92023cb2b06d7991ac3f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c873374a81a4c6154762e8ced961a3e40113c687bf92023cb2b06d7991ac3f6", kill_on_drop: false }`
[INFO] [stdout] 5c873374a81a4c6154762e8ced961a3e40113c687bf92023cb2b06d7991ac3f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f18ff7df993fdaa9ec9b28167c337595b3ba5f767a61fbf852d7a9bfa8c968f8
[INFO] running `Command { std: "docker" "start" "-a" "f18ff7df993fdaa9ec9b28167c337595b3ba5f767a61fbf852d7a9bfa8c968f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling stfu8 v0.2.4
[INFO] [stdout] warning: field is never read: `pending_transactions`
[INFO] [stdout]  --> src/blockchain.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pending_transactions: Vec<Transaction>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_chain`
[INFO] [stdout]   --> src/blockchain.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_chain(&self) -> Vec<Block> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_pending_transactions`
[INFO] [stdout]   --> src/blockchain.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn get_pending_transactions(&self) -> Vec<Transaction> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_last_block`
[INFO] [stdout]   --> src/blockchain.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn get_last_block(&self) -> Block {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_block`
[INFO] [stdout]   --> src/blockchain.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn create_block(&self) -> Block {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_block`
[INFO] [stdout]   --> src/blockchain.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn add_block(&mut self, payout_address: &'static str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_chain`
[INFO] [stdout]   --> src/blockchain.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 |     fn update_chain(&mut self, last_block: Block, new_block: Block) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pay_miner`
[INFO] [stdout]   --> src/blockchain.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn pay_miner(&mut self, payout_address: &'static str) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_payout_transaction`
[INFO] [stdout]   --> src/blockchain.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn create_payout_transaction(&self, payout_address: &'static str) -> Transaction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset_pending_transactions`
[INFO] [stdout]   --> src/blockchain.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn reset_pending_transactions(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_pending_transaction`
[INFO] [stdout]    --> src/blockchain.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn add_pending_transaction(&mut self, transaction: Transaction) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `transactions`
[INFO] [stdout]  --> src/block.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     transactions: Vec<Transaction>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Block` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/block.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Debug, Clone)]
[INFO] [stdout]   |          ^^^^^  ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_transactions`
[INFO] [stdout]   --> src/block.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn get_transactions(&self) -> Vec<Transaction> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hash`
[INFO] [stdout]   --> src/block.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_prev_hash`
[INFO] [stdout]   --> src/block.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_prev_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_next_hash`
[INFO] [stdout]   --> src/block.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn get_next_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_prev_hash`
[INFO] [stdout]   --> src/block.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn set_prev_hash(&mut self, hash: &str) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_next_hash`
[INFO] [stdout]   --> src/block.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn set_next_hash(&mut self, hash: &str) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mine`
[INFO] [stdout]   --> src/block.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn mine(&mut self, difficulty: usize) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hash`
[INFO] [stdout]   --> src/transaction.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn get_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_sender`
[INFO] [stdout]   --> src/transaction.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn get_sender(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_receiver`
[INFO] [stdout]   --> src/transaction.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_receiver(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_amount`
[INFO] [stdout]   --> src/transaction.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_amount(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling voca_rs v1.13.1
[INFO] [stderr]    Compiling demonstrate v0.4.5
[INFO] [stderr]    Compiling block_chain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `pending_transactions`
[INFO] [stdout]  --> src/blockchain.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pending_transactions: Vec<Transaction>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_chain`
[INFO] [stdout]   --> src/blockchain.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_chain(&self) -> Vec<Block> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_pending_transactions`
[INFO] [stdout]   --> src/blockchain.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn get_pending_transactions(&self) -> Vec<Transaction> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_last_block`
[INFO] [stdout]   --> src/blockchain.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn get_last_block(&self) -> Block {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_block`
[INFO] [stdout]   --> src/blockchain.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn create_block(&self) -> Block {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_block`
[INFO] [stdout]   --> src/blockchain.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 |     pub fn add_block(&mut self, payout_address: &'static str) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `update_chain`
[INFO] [stdout]   --> src/blockchain.rs:82:8
[INFO] [stdout]    |
[INFO] [stdout] 82 |     fn update_chain(&mut self, last_block: Block, new_block: Block) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pay_miner`
[INFO] [stdout]   --> src/blockchain.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn pay_miner(&mut self, payout_address: &'static str) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_payout_transaction`
[INFO] [stdout]   --> src/blockchain.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn create_payout_transaction(&self, payout_address: &'static str) -> Transaction {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset_pending_transactions`
[INFO] [stdout]   --> src/blockchain.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn reset_pending_transactions(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_pending_transaction`
[INFO] [stdout]    --> src/blockchain.rs:102:12
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn add_pending_transaction(&mut self, transaction: Transaction) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `transactions`
[INFO] [stdout]  --> src/block.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     transactions: Vec<Transaction>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Block` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/block.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(Debug, Clone)]
[INFO] [stdout]   |          ^^^^^  ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_transactions`
[INFO] [stdout]   --> src/block.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn get_transactions(&self) -> Vec<Transaction> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hash`
[INFO] [stdout]   --> src/block.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_prev_hash`
[INFO] [stdout]   --> src/block.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_prev_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_next_hash`
[INFO] [stdout]   --> src/block.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn get_next_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_prev_hash`
[INFO] [stdout]   --> src/block.rs:57:12
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn set_prev_hash(&mut self, hash: &str) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_next_hash`
[INFO] [stdout]   --> src/block.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn set_next_hash(&mut self, hash: &str) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mine`
[INFO] [stdout]   --> src/block.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn mine(&mut self, difficulty: usize) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_hash`
[INFO] [stdout]   --> src/transaction.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn get_hash(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_sender`
[INFO] [stdout]   --> src/transaction.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn get_sender(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_receiver`
[INFO] [stdout]   --> src/transaction.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get_receiver(&self) -> &'static str {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_amount`
[INFO] [stdout]   --> src/transaction.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn get_amount(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `payout_address`
[INFO] [stdout]  --> tests/blockchain.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 |             let payout_address = "test_payout";
[INFO] [stdout]   |                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_payout_address`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `transaction`
[INFO] [stdout]   --> tests/blockchain.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |             let transaction = Transaction::new(sender, receiver, amount);
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_transaction`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/blockchain.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |             let mut blockchain = BlockChain::new(name, difficulty, payout, supply);
[INFO] [stdout]    |                 ----^^^^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first_transaction`
[INFO] [stdout]   --> tests/block.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 |             let first_transaction = transactions.first().unwrap().clone();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_transaction`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> tests/block.rs:11:17
[INFO] [stdout]    |
[INFO] [stdout] 11 |             let mut block = Block::new(transactions);
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 23 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 23.59s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/block_chain-95744e02fb905051)
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/block_chain-4d8f1d953d2d4229)
[INFO] [stderr]   Executable tests/block.rs (/opt/rustwide/target/debug/deps/block-b110f470f66c36ea)
[INFO] [stderr]   Executable tests/blockchain.rs (/opt/rustwide/target/debug/deps/blockchain-cf568425970d2825)
[INFO] [stderr]   Executable tests/transaction.rs (/opt/rustwide/target/debug/deps/transaction-978d45582c5ace3f)
[INFO] running `Command { std: "docker" "inspect" "f18ff7df993fdaa9ec9b28167c337595b3ba5f767a61fbf852d7a9bfa8c968f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f18ff7df993fdaa9ec9b28167c337595b3ba5f767a61fbf852d7a9bfa8c968f8", kill_on_drop: false }`
[INFO] [stdout] f18ff7df993fdaa9ec9b28167c337595b3ba5f767a61fbf852d7a9bfa8c968f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b1777cd020e2086365e0273559788f5a9e9d1daa60e98c529654cde3816fad96
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b1777cd020e2086365e0273559788f5a9e9d1daa60e98c529654cde3816fad96", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `pending_transactions`
[INFO] [stderr]  --> src/blockchain.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pending_transactions: Vec<Transaction>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_chain`
[INFO] [stderr]   --> src/blockchain.rs:49:12
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn get_chain(&self) -> Vec<Block> {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_pending_transactions`
[INFO] [stderr]   --> src/blockchain.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn get_pending_transactions(&self) -> Vec<Transaction> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_last_block`
[INFO] [stderr]   --> src/blockchain.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn get_last_block(&self) -> Block {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `create_block`
[INFO] [stderr]   --> src/blockchain.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 67 |     fn create_block(&self) -> Block {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_block`
[INFO] [stderr]   --> src/blockchain.rs:71:12
[INFO] [stderr]    |
[INFO] [stderr] 71 |     pub fn add_block(&mut self, payout_address: &'static str) {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `update_chain`
[INFO] [stderr]   --> src/blockchain.rs:82:8
[INFO] [stderr]    |
[INFO] [stderr] 82 |     fn update_chain(&mut self, last_block: Block, new_block: Block) {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pay_miner`
[INFO] [stderr]   --> src/blockchain.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 89 |     fn pay_miner(&mut self, payout_address: &'static str) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `create_payout_transaction`
[INFO] [stderr]   --> src/blockchain.rs:94:8
[INFO] [stderr]    |
[INFO] [stderr] 94 |     fn create_payout_transaction(&self, payout_address: &'static str) -> Transaction {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `reset_pending_transactions`
[INFO] [stderr]   --> src/blockchain.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn reset_pending_transactions(&mut self) {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add_pending_transaction`
[INFO] [stderr]    --> src/blockchain.rs:102:12
[INFO] [stderr]     |
[INFO] [stderr] 102 |     pub fn add_pending_transaction(&mut self, transaction: Transaction) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `transactions`
[INFO] [stderr]  --> src/block.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     transactions: Vec<Transaction>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Block` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/block.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | #[derive(Debug, Clone)]
[INFO] [stderr]   |          ^^^^^  ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_transactions`
[INFO] [stderr]   --> src/block.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn get_transactions(&self) -> Vec<Transaction> {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_hash`
[INFO] [stderr]   --> src/block.rs:45:12
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn get_hash(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_prev_hash`
[INFO] [stderr]   --> src/block.rs:49:12
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn get_prev_hash(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_next_hash`
[INFO] [stderr]   --> src/block.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn get_next_hash(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_prev_hash`
[INFO] [stderr]   --> src/block.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn set_prev_hash(&mut self, hash: &str) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `set_next_hash`
[INFO] [stderr]   --> src/block.rs:61:12
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn set_next_hash(&mut self, hash: &str) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `mine`
[INFO] [stderr]   --> src/block.rs:65:12
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn mine(&mut self, difficulty: usize) {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_hash`
[INFO] [stderr]   --> src/transaction.rs:37:12
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn get_hash(&self) -> &str {
[INFO] [stderr]    |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_sender`
[INFO] [stderr]   --> src/transaction.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn get_sender(&self) -> &'static str {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_receiver`
[INFO] [stderr]   --> src/transaction.rs:45:12
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn get_receiver(&self) -> &'static str {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_amount`
[INFO] [stderr]   --> src/transaction.rs:49:12
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn get_amount(&self) -> u32 {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `block_chain` (bin "block_chain") generated 23 warnings
[INFO] [stderr] warning: unused variable: `payout_address`
[INFO] [stderr]  --> tests/blockchain.rs:9:17
[INFO] [stderr]   |
[INFO] [stderr] 9 |             let payout_address = "test_payout";
[INFO] [stderr]   |                 ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_payout_address`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `transaction`
[INFO] [stderr]   --> tests/blockchain.rs:20:17
[INFO] [stderr]    |
[INFO] [stderr] 20 |             let transaction = Transaction::new(sender, receiver, amount);
[INFO] [stderr]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_transaction`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/blockchain.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |             let mut blockchain = BlockChain::new(name, difficulty, payout, supply);
[INFO] [stderr]    |                 ----^^^^^^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first_transaction`
[INFO] [stderr]   --> tests/block.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 |             let first_transaction = transactions.first().unwrap().clone();
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_first_transaction`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/block.rs:11:17
[INFO] [stderr]    |
[INFO] [stderr] 11 |             let mut block = Block::new(transactions);
[INFO] [stderr]    |                 ----^^^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `block_chain` (test "blockchain") generated 3 warnings
[INFO] [stderr] warning: `block_chain` (test "block") generated 2 warnings
[INFO] [stderr] warning: `block_chain` (bin "block_chain" test) generated 23 warnings (23 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/block_chain-95744e02fb905051)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/block_chain-4d8f1d953d2d4229)
[INFO] [stdout] 
[INFO] [stderr]      Running tests/block.rs (/opt/rustwide/target/debug/deps/block-b110f470f66c36ea)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test block::instantiates_block_with_the_correct_properties ... ok
[INFO] [stdout] test block::updates_prev_block_hash ... ok
[INFO] [stdout] test block::updates_next_block_hash ... ok
[INFO] [stdout] test block::mines_block ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/blockchain.rs (/opt/rustwide/target/debug/deps/blockchain-cf568425970d2825)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test blockchain::adds_a_new_block_to_the_chain ... ok
[INFO] [stderr]      Running tests/transaction.rs (/opt/rustwide/target/debug/deps/transaction-978d45582c5ace3f)
[INFO] [stdout] test blockchain::adds_a_new_transaction_to_pending_transactions ... ok
[INFO] [stdout] test blockchain::creates_a_genesis_block_when_instantiated ... ok
[INFO] [stdout] test blockchain::updates_the_previous_block_s_next_hash_with_the_new_block_hash ... ok
[INFO] [stdout] test blockchain::pays_miner_after_adding_block_to_chain ... ok
[INFO] [stdout] test blockchain::is_instantiated_with_the_correct_properties ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test transaction::instantiates_transaction_with_the_correct_properties ... ok
[INFO] [stderr]    Doc-tests block_chain
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b1777cd020e2086365e0273559788f5a9e9d1daa60e98c529654cde3816fad96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1777cd020e2086365e0273559788f5a9e9d1daa60e98c529654cde3816fad96", kill_on_drop: false }`
[INFO] [stdout] b1777cd020e2086365e0273559788f5a9e9d1daa60e98c529654cde3816fad96