[INFO] cloning repository https://github.com/qihan-z/bitcoin_network_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qihan-z/bitcoin_network_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqihan-z%2Fbitcoin_network_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqihan-z%2Fbitcoin_network_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f7f6f6c44e3efde6e978ca8660ddee630bd5a1a0
[INFO] checking qihan-z/bitcoin_network_rust against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqihan-z%2Fbitcoin_network_rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/qihan-z/bitcoin_network_rust
[INFO] finished tweaking git repo https://github.com/qihan-z/bitcoin_network_rust
[INFO] tweaked toml for git repo https://github.com/qihan-z/bitcoin_network_rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/qihan-z/bitcoin_network_rust on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/qihan-z/bitcoin_network_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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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_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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90f1f4a7874223ce22865117e263f43d6d6df2921100068d3181b5a97f1024cf
[INFO] running `Command { std: "docker" "start" "-a" "90f1f4a7874223ce22865117e263f43d6d6df2921100068d3181b5a97f1024cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90f1f4a7874223ce22865117e263f43d6d6df2921100068d3181b5a97f1024cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90f1f4a7874223ce22865117e263f43d6d6df2921100068d3181b5a97f1024cf", kill_on_drop: false }`
[INFO] [stdout] 90f1f4a7874223ce22865117e263f43d6d6df2921100068d3181b5a97f1024cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7aa1867337c3ff2b5403143bf933a5fb321301698afd78cc561ebffc092b7f49
[INFO] running `Command { std: "docker" "start" "-a" "7aa1867337c3ff2b5403143bf933a5fb321301698afd78cc561ebffc092b7f49", kill_on_drop: false }`
[INFO] [stderr]     Checking cpufeatures v0.2.9
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking sha2 v0.10.7
[INFO] [stderr]     Checking bitcoin_network_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `Block` is never constructed
[INFO] [stdout]  --> src/block.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Block {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `time`, `data`, and `prev_block_hash` are never read
[INFO] [stdout]  --> src/block.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Block {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     time: u64,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     data: Vec<u8>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     prev_block_hash: Vec<u8>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_hash`, and `new_genesis_block` are never used
[INFO] [stdout]   --> src/block.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Block {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 11 |     fn new(data: &str, prev_block_hash: Vec<u8>) -> Block {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn set_hash(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn new_genesis_block() -> Block {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Block` is never constructed
[INFO] [stdout]  --> src/block.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Block {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `time`, `data`, and `prev_block_hash` are never read
[INFO] [stdout]  --> src/block.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Block {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     time: u64,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     data: Vec<u8>,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     prev_block_hash: Vec<u8>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `set_hash`, and `new_genesis_block` are never used
[INFO] [stdout]   --> src/block.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl Block {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 11 |     fn new(data: &str, prev_block_hash: Vec<u8>) -> Block {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn set_hash(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn new_genesis_block() -> Block {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bitcoin_network_rust` (bin "bitcoin_network_rust") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `bitcoin_network_rust` (bin "bitcoin_network_rust" test) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "7aa1867337c3ff2b5403143bf933a5fb321301698afd78cc561ebffc092b7f49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7aa1867337c3ff2b5403143bf933a5fb321301698afd78cc561ebffc092b7f49", kill_on_drop: false }`
[INFO] [stdout] 7aa1867337c3ff2b5403143bf933a5fb321301698afd78cc561ebffc092b7f49
