[INFO] cloning repository https://github.com/cartelansky/Blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cartelansky/Blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcartelansky%2FBlockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcartelansky%2FBlockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6eb7dd0cca57fa88541b7a6dd76842fdd099513
[INFO] checking cartelansky/Blockchain against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcartelansky%2FBlockchain" "/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/cartelansky/Blockchain on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cartelansky/Blockchain
[INFO] finished tweaking git repo https://github.com/cartelansky/Blockchain
[INFO] tweaked toml for git repo https://github.com/cartelansky/Blockchain written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cartelansky/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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6fe58465d0765da4ad7a89c06435fb6aa73eb357721055a1f428f676f8e6612
[INFO] running `Command { std: "docker" "start" "-a" "f6fe58465d0765da4ad7a89c06435fb6aa73eb357721055a1f428f676f8e6612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6fe58465d0765da4ad7a89c06435fb6aa73eb357721055a1f428f676f8e6612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6fe58465d0765da4ad7a89c06435fb6aa73eb357721055a1f428f676f8e6612", kill_on_drop: false }`
[INFO] [stdout] f6fe58465d0765da4ad7a89c06435fb6aa73eb357721055a1f428f676f8e6612
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3164d756db547cb8c72a1c0a12a9e559abe9e3fdc061454e1b6573b4062e3ec2
[INFO] running `Command { std: "docker" "start" "-a" "3164d756db547cb8c72a1c0a12a9e559abe9e3fdc061454e1b6573b4062e3ec2", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]     Checking cpufeatures v0.2.12
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking tokio v1.36.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]     Checking chrono v0.4.34
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking sha256 v1.5.0
[INFO] [stderr]     Checking blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `hash` is never read
[INFO] [stdout]   --> src/block.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut hash = String::new();
[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: value assigned to `hash` is never read
[INFO] [stdout]   --> src/block.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut hash = String::new();
[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: fields `index`, `timestamp`, `transaction`, `previous_hash`, and `nonce` are never read
[INFO] [stdout]   --> src/block.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Block {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 16 |     index: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 17 |     timestamp: DateTime<Utc>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 18 |     transaction: Vec<Transaction>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 19 |     pub hash: String,
[INFO] [stdout] 20 |     previous_hash: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 21 |     nonce: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `index`, `timestamp`, `transaction`, `previous_hash`, and `nonce` are never read
[INFO] [stdout]   --> src/block.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Block {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 16 |     index: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 17 |     timestamp: DateTime<Utc>,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 18 |     transaction: Vec<Transaction>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 19 |     pub hash: String,
[INFO] [stdout] 20 |     previous_hash: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 21 |     nonce: u64,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Block` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sender`, `receive`, and `amount` are never read
[INFO] [stdout]   --> src/block.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub struct Transaction {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 56 |     sender: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 57 |     receive: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 58 |     amount: u64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transaction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sender`, `receive`, and `amount` are never read
[INFO] [stdout]   --> src/block.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub struct Transaction {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 56 |     sender: String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 57 |     receive: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 58 |     amount: u64,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transaction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.54s
[INFO] running `Command { std: "docker" "inspect" "3164d756db547cb8c72a1c0a12a9e559abe9e3fdc061454e1b6573b4062e3ec2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3164d756db547cb8c72a1c0a12a9e559abe9e3fdc061454e1b6573b4062e3ec2", kill_on_drop: false }`
[INFO] [stdout] 3164d756db547cb8c72a1c0a12a9e559abe9e3fdc061454e1b6573b4062e3ec2