[INFO] cloning repository https://github.com/memoriesadrift/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/memoriesadrift/mini-blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoriesadrift%2Fmini-blockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoriesadrift%2Fmini-blockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e29a6bcbec816340ff3602e0d862700b6962cf76
[INFO] checking memoriesadrift/mini-blockchain against try#2b39fe756f52bc2825bf5b2bfc385cab922dae10 for pr-143011
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoriesadrift%2Fmini-blockchain" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/memoriesadrift/mini-blockchain
[INFO] finished tweaking git repo https://github.com/memoriesadrift/mini-blockchain
[INFO] tweaked toml for git repo https://github.com/memoriesadrift/mini-blockchain written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/memoriesadrift/mini-blockchain on toolchain 2b39fe756f52bc2825bf5b2bfc385cab922dae10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/memoriesadrift/mini-blockchain 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" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 4e9fde79fde25e276810ddf62735d592937c70eb90460ead8bca2cba03bb1e13
[INFO] running `Command { std: "docker" "start" "-a" "4e9fde79fde25e276810ddf62735d592937c70eb90460ead8bca2cba03bb1e13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e9fde79fde25e276810ddf62735d592937c70eb90460ead8bca2cba03bb1e13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e9fde79fde25e276810ddf62735d592937c70eb90460ead8bca2cba03bb1e13", kill_on_drop: false }`
[INFO] [stdout] 4e9fde79fde25e276810ddf62735d592937c70eb90460ead8bca2cba03bb1e13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+2b39fe756f52bc2825bf5b2bfc385cab922dae10" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04c063a17f808aa7a5b69acc130fba7cd353cf0f2d934d07a94c9cdc1f6d0c0c
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[INFO] [stdout] warning: unused variable: `db`
[INFO] [stdout]   --> src/api/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     db: Arc<BlockchainDB>,
[INFO] [stdout]    |     ^^ help: if this is intentional, prefix it with an underscore: `_db`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `db`
[INFO] [stdout]   --> src/p2p/listener.rs:10:45
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub async fn handle_peer(stream: TcpStream, db: Arc<BlockchainDB>, mut shutdown: broadcast::Receiver<()>) {
[INFO] [stdout]    |                                             ^^ help: if this is intentional, prefix it with an underscore: `_db`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `handshake_completed` is assigned to, but never used
[INFO] [stdout]   --> src/p2p/listener.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut handshake_completed = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_handshake_completed` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `handshake_completed` is never read
[INFO] [stdout]   --> src/p2p/listener.rs:44:33
[INFO] [stdout]    |
[INFO] [stdout] 44 | ...                   handshake_completed = true;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `db`
[INFO] [stdout]   --> src/api/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     db: Arc<BlockchainDB>,
[INFO] [stdout]    |     ^^ help: if this is intentional, prefix it with an underscore: `_db`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `db`
[INFO] [stdout]   --> src/p2p/listener.rs:10:45
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub async fn handle_peer(stream: TcpStream, db: Arc<BlockchainDB>, mut shutdown: broadcast::Receiver<()>) {
[INFO] [stdout]    |                                             ^^ help: if this is intentional, prefix it with an underscore: `_db`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `handshake_completed` is assigned to, but never used
[INFO] [stdout]   --> src/p2p/listener.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut handshake_completed = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_handshake_completed` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `handshake_completed` is never read
[INFO] [stdout]   --> src/p2p/listener.rs:44:33
[INFO] [stdout]    |
[INFO] [stdout] 44 | ...                   handshake_completed = true;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `hash` and `genesis` are never used
[INFO] [stdout]   --> src/models/block.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Block {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 18 |     pub fn hash(&self) -> Hash {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn genesis() -> Self {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `hash` is never used
[INFO] [stdout]   --> src/models/transaction.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl Transaction {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 44 |     pub fn hash(&self) -> Hash {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SyntacticValidation` is never used
[INFO] [stdout]  --> src/models/syntactic_validation.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait SyntacticValidation {
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLOCK_DIFFICULTY` is never used
[INFO] [stdout]  --> src/config.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub const BLOCK_DIFFICULTY: usize = 1;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COIN_DECIMALS` is never used
[INFO] [stdout]  --> src/config.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub const COIN_DECIMALS: usize = 6;
[INFO] [stdout]   |           ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COINBASE_REWARD` is never used
[INFO] [stdout]  --> src/config.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const COINBASE_REWARD: U256 = uint!(1000000_U256);
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mine_block` is never used
[INFO] [stdout]  --> src/miner/mod.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn mine_block(block: &mut Block) -> &mut Block {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_valid_blockhash` is never used
[INFO] [stdout]   --> src/miner/mod.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn is_valid_blockhash(hash: &Hash) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `db` is never read
[INFO] [stdout]  --> src/storage/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct BlockchainDB {
[INFO] [stdout]   |            ------------ field in this struct
[INFO] [stdout] 6 |     db: Db,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `save_block`, `save_tx`, `get_block`, and `get_tx` are never used
[INFO] [stdout]   --> src/storage/mod.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl BlockchainDB {
[INFO] [stdout]    | ----------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn save_block(&self, block: &Block) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn save_tx(&self, tx: &Transaction) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_block(&self, hash: &Hash) -> Option<Block> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn get_tx(&self, hash: &Hash) -> Option<Transaction> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `hash` and `genesis` are never used
[INFO] [stdout]   --> src/models/block.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Block {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 18 |     pub fn hash(&self) -> Hash {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn genesis() -> Self {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `hash` is never used
[INFO] [stdout]   --> src/models/transaction.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl Transaction {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 44 |     pub fn hash(&self) -> Hash {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `SyntacticValidation` is never used
[INFO] [stdout]  --> src/models/syntactic_validation.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait SyntacticValidation {
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLOCK_DIFFICULTY` is never used
[INFO] [stdout]  --> src/config.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub const BLOCK_DIFFICULTY: usize = 1;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COIN_DECIMALS` is never used
[INFO] [stdout]  --> src/config.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub const COIN_DECIMALS: usize = 6;
[INFO] [stdout]   |           ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `COINBASE_REWARD` is never used
[INFO] [stdout]  --> src/config.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const COINBASE_REWARD: U256 = uint!(1000000_U256);
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mine_block` is never used
[INFO] [stdout]  --> src/miner/mod.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn mine_block(block: &mut Block) -> &mut Block {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_valid_blockhash` is never used
[INFO] [stdout]   --> src/miner/mod.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn is_valid_blockhash(hash: &Hash) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `db` is never read
[INFO] [stdout]  --> src/storage/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct BlockchainDB {
[INFO] [stdout]   |            ------------ field in this struct
[INFO] [stdout] 6 |     db: Db,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `save_block`, `save_tx`, `get_block`, and `get_tx` are never used
[INFO] [stdout]   --> src/storage/mod.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl BlockchainDB {
[INFO] [stdout]    | ----------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub fn save_block(&self, block: &Block) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn save_tx(&self, tx: &Transaction) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn get_block(&self, hash: &Hash) -> Option<Block> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn get_tx(&self, hash: &Hash) -> Option<Transaction> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 27s
[INFO] running `Command { std: "docker" "inspect" "04c063a17f808aa7a5b69acc130fba7cd353cf0f2d934d07a94c9cdc1f6d0c0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04c063a17f808aa7a5b69acc130fba7cd353cf0f2d934d07a94c9cdc1f6d0c0c", kill_on_drop: false }`
[INFO] [stdout] 04c063a17f808aa7a5b69acc130fba7cd353cf0f2d934d07a94c9cdc1f6d0c0c
