[INFO] cloning repository https://github.com/amschel99/POW
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amschel99/POW" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famschel99%2FPOW", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famschel99%2FPOW'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5ede213cf357269a714d7f093d0d8633a4301bd6
[INFO] checking amschel99/POW/5ede213cf357269a714d7f093d0d8633a4301bd6 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famschel99%2FPOW" "/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/amschel99/POW on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amschel99/POW
[INFO] finished tweaking git repo https://github.com/amschel99/POW
[INFO] tweaked toml for git repo https://github.com/amschel99/POW written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/amschel99/POW 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2518ef08b52513cd381f28313836072e1ad39900f4827152c6c9863a01ec0fd1
[INFO] running `Command { std: "docker" "start" "-a" "2518ef08b52513cd381f28313836072e1ad39900f4827152c6c9863a01ec0fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2518ef08b52513cd381f28313836072e1ad39900f4827152c6c9863a01ec0fd1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2518ef08b52513cd381f28313836072e1ad39900f4827152c6c9863a01ec0fd1", kill_on_drop: false }`
[INFO] [stdout] 2518ef08b52513cd381f28313836072e1ad39900f4827152c6c9863a01ec0fd1
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 27ea64419cf8031e7c7cb2ca6f5602b74cb199bec336e0fe730cc1f3fb26d19e
[INFO] running `Command { std: "docker" "start" "-a" "27ea64419cf8031e7c7cb2ca6f5602b74cb199bec336e0fe730cc1f3fb26d19e", kill_on_drop: false }`
[INFO] [stderr]     Checking pow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `hash`, `previous`, `message`, `nonce`, and `metadata` are never read
[INFO] [stdout]   --> src/block/mod.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct Block {
[INFO] [stdout]    |        ----- fields in this struct
[INFO] [stdout] 10 |     hash: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     previous: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 12 |     message: Option<Message>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 13 |     nonce: Option<String>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 14 |     metadata: Option<String>,
[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]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `add_block` is never used
[INFO] [stdout]   --> src/block/mod.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Blockchain {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn add_block(&mut self, block: Block) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `sender`, `receiver`, `amount`, `timestamp`, `signature`, and `metadata` are never read
[INFO] [stdout]  --> src/message/mod.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Message {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 3 |     sender: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 4 |     receiver: String,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 5 |     amount: u128,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 6 |     timestamp: String,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 7 |     signature: String,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 8 |     metadata: Option<String>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Block` is never constructed
[INFO] [stdout]  --> src/block/mod.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Block {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Blockchain` is never constructed
[INFO] [stdout]   --> src/block/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Blockchain {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `add_block`, and `genesis_block` are never used
[INFO] [stdout]   --> src/block/mod.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Blockchain {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 22 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn add_block(&mut self, block: Block) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     fn genesis_block() -> Block {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IsBlock` is never used
[INFO] [stdout]   --> src/block/mod.rs:44:11
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub trait IsBlock {
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `launch_blockchain` is never used
[INFO] [stdout]   --> src/block/mod.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub fn launch_blockchain() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Message` is never constructed
[INFO] [stdout]  --> src/message/mod.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Message {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "27ea64419cf8031e7c7cb2ca6f5602b74cb199bec336e0fe730cc1f3fb26d19e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27ea64419cf8031e7c7cb2ca6f5602b74cb199bec336e0fe730cc1f3fb26d19e", kill_on_drop: false }`
[INFO] [stdout] 27ea64419cf8031e7c7cb2ca6f5602b74cb199bec336e0fe730cc1f3fb26d19e