[INFO] cloning repository https://github.com/ken-kaneki-9/Blockchain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ken-kaneki-9/Blockchain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fken-kaneki-9%2FBlockchain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fken-kaneki-9%2FBlockchain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9231f86549d773a0c57c7c36c2bac133af55ffdb
[INFO] checking ken-kaneki-9/Blockchain against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fken-kaneki-9%2FBlockchain" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] [stderr] Updating files:  78% (1283/1631)
Updating files:  79% (1289/1631)
Updating files:  80% (1305/1631)
Updating files:  81% (1322/1631)
Updating files:  82% (1338/1631)
Updating files:  83% (1354/1631)
Updating files:  84% (1371/1631)
Updating files:  85% (1387/1631)
Updating files:  86% (1403/1631)
Updating files:  87% (1419/1631)
Updating files:  88% (1436/1631)
Updating files:  89% (1452/1631)
Updating files:  90% (1468/1631)
Updating files:  91% (1485/1631)
Updating files:  92% (1501/1631)
Updating files:  93% (1517/1631)
Updating files:  94% (1534/1631)
Updating files:  95% (1550/1631)
Updating files:  96% (1566/1631)
Updating files:  97% (1583/1631)
Updating files:  98% (1599/1631)
Updating files:  99% (1615/1631)
Updating files: 100% (1631/1631)
Updating files: 100% (1631/1631), done.
[INFO] started tweaking git repo https://github.com/ken-kaneki-9/Blockchain
[INFO] finished tweaking git repo https://github.com/ken-kaneki-9/Blockchain
[INFO] tweaked toml for git repo https://github.com/ken-kaneki-9/Blockchain written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ken-kaneki-9/Blockchain on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ken-kaneki-9/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" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c0af3998e971868164375a7dfb646c9933ddd1a3bdb00fa2041266763dc1eeab" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63
[INFO] running `Command { std: "docker" "start" "4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]    Compiling syn v2.0.101
[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 v0.10.9
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking serde_json v1.0.140
[INFO] [stderr]     Checking bk_simple v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |             fs::write("blockchain.json", serialization);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |             let _ = fs::write("blockchain.json", serialization);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |             fs::write("blockchain.json", serialization);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |             let _ = fs::write("blockchain.json", serialization);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.93s
[INFO] running `Command { std: "docker" "inspect" "4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63", kill_on_drop: false }`
[INFO] [stdout] 4c2cad1bf0a15b06cc2343f5e8ef854bf4cf154552861097b4ee08a0b005fa63
