[INFO] cloning repository https://github.com/zakrad/blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zakrad/blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzakrad%2Fblockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzakrad%2Fblockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a8305f6bda9aa39325bc7f00b6bc1ff1c8ced34f
[INFO] checking zakrad/blockchain against master#a5db378dc14a40dd1580c27fb8362156446382c3 for pr-136490
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzakrad%2Fblockchain" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zakrad/blockchain on toolchain a5db378dc14a40dd1580c27fb8362156446382c3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a5db378dc14a40dd1580c27fb8362156446382c3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zakrad/blockchain
[INFO] finished tweaking git repo https://github.com/zakrad/blockchain
[INFO] tweaked toml for git repo https://github.com/zakrad/blockchain written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zakrad/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" "+a5db378dc14a40dd1580c27fb8362156446382c3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+a5db378dc14a40dd1580c27fb8362156446382c3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bdaa2e5973dac80997604f71e00774d723aa10a4b78d32b6b780c0b3eb2d3edf
[INFO] running `Command { std: "docker" "start" "-a" "bdaa2e5973dac80997604f71e00774d723aa10a4b78d32b6b780c0b3eb2d3edf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bdaa2e5973dac80997604f71e00774d723aa10a4b78d32b6b780c0b3eb2d3edf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdaa2e5973dac80997604f71e00774d723aa10a4b78d32b6b780c0b3eb2d3edf", kill_on_drop: false }`
[INFO] [stdout] bdaa2e5973dac80997604f71e00774d723aa10a4b78d32b6b780c0b3eb2d3edf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+a5db378dc14a40dd1580c27fb8362156446382c3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ebe18e102ff09386556450c3337f033f62a68d6796d8c0c8ee0b7d7e8a5c654
[INFO] running `Command { std: "docker" "start" "-a" "1ebe18e102ff09386556450c3337f033f62a68d6796d8c0c8ee0b7d7e8a5c654", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.124
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking generic-array v0.9.1
[INFO] [stderr]     Checking digest v0.7.6
[INFO] [stderr]     Checking sha2 v0.7.1
[INFO] [stderr]     Checking blockchain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `Chain` in `blockchain`
[INFO] [stdout]   --> src/main.rs:23:33
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut chain = blockchain::Chain::new(miner_addr.trim().to_string(), diff);
[INFO] [stdout]    |                                 ^^^^^ could not find `Chain` in `blockchain`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these structs
[INFO] [stdout]    |
[INFO] [stdout] 4  + use crate::io::Chain;
[INFO] [stdout]    |
[INFO] [stdout] 4  + use std::io::Chain;
[INFO] [stdout]    |
[INFO] [stdout] 4  + use std::iter::Chain;
[INFO] [stdout]    |
[INFO] [stdout] 4  + use core::iter::Chain;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `Chain`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 23 -     let mut chain = blockchain::Chain::new(miner_addr.trim().to_string(), diff);
[INFO] [stdout] 23 +     let mut chain = Chain::new(miner_addr.trim().to_string(), diff);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/main.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{Read, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `blockchain` (bin "blockchain" test) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0433]: failed to resolve: could not find `Chain` in `blockchain`
[INFO] [stdout]   --> src/main.rs:23:33
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut chain = blockchain::Chain::new(miner_addr.trim().to_string(), diff);
[INFO] [stdout]    |                                 ^^^^^ could not find `Chain` in `blockchain`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these structs
[INFO] [stdout]    |
[INFO] [stdout] 4  + use crate::io::Chain;
[INFO] [stdout]    |
[INFO] [stdout] 4  + use std::io::Chain;
[INFO] [stdout]    |
[INFO] [stdout] 4  + use std::iter::Chain;
[INFO] [stdout]    |
[INFO] [stdout] 4  + use core::iter::Chain;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `Chain`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 23 -     let mut chain = blockchain::Chain::new(miner_addr.trim().to_string(), diff);
[INFO] [stdout] 23 +     let mut chain = Chain::new(miner_addr.trim().to_string(), diff);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/main.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{Read, Write};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `blockchain` (bin "blockchain") due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1ebe18e102ff09386556450c3337f033f62a68d6796d8c0c8ee0b7d7e8a5c654", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ebe18e102ff09386556450c3337f033f62a68d6796d8c0c8ee0b7d7e8a5c654", kill_on_drop: false }`
[INFO] [stdout] 1ebe18e102ff09386556450c3337f033f62a68d6796d8c0c8ee0b7d7e8a5c654