[INFO] cloning repository https://github.com/jeffrey-xiao/kademlia-dht-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeffrey-xiao/kademlia-dht-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffrey-xiao%2Fkademlia-dht-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffrey-xiao%2Fkademlia-dht-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7b233696cecb4555f0ab47e65e0bfbc306e66336
[INFO] checking jeffrey-xiao/kademlia-dht-rs against master#092a284ba0421695f2032c947765429fd7095796 for pr-139763
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffrey-xiao%2Fkademlia-dht-rs" "/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/jeffrey-xiao/kademlia-dht-rs on toolchain 092a284ba0421695f2032c947765429fd7095796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+092a284ba0421695f2032c947765429fd7095796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jeffrey-xiao/kademlia-dht-rs
[INFO] finished tweaking git repo https://github.com/jeffrey-xiao/kademlia-dht-rs
[INFO] tweaked toml for git repo https://github.com/jeffrey-xiao/kademlia-dht-rs written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+092a284ba0421695f2032c947765429fd7095796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 71 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v0.9.2 (available: v2.0.1)
[INFO] [stderr]       Adding num-bigint v0.1.45 (available: v0.4.6)
[INFO] [stderr]       Adding rand v0.4.6 (available: v0.9.0)
[INFO] [stderr]       Adding sha3 v0.7.3 (available: v0.10.8)
[INFO] [stderr]       Adding simplelog v0.5.3 (available: v0.12.2)
[INFO] [stderr]       Adding time v0.1.45 (available: v0.3.41)
[INFO] [stderr]       Adding wasi v0.10.0+wasi-snapshot-preview1 (available: v0.10.2+wasi-snapshot-preview1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+092a284ba0421695f2032c947765429fd7095796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simplelog v0.5.3
[INFO] [stderr]   Downloaded num-bigint v0.1.45
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+092a284ba0421695f2032c947765429fd7095796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b89d9e5a3e7f5f09ebefd5cddcaeebc1b3cf605f5eaa9700e50f2f2f8b767852
[INFO] running `Command { std: "docker" "start" "-a" "b89d9e5a3e7f5f09ebefd5cddcaeebc1b3cf605f5eaa9700e50f2f2f8b767852", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b89d9e5a3e7f5f09ebefd5cddcaeebc1b3cf605f5eaa9700e50f2f2f8b767852", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b89d9e5a3e7f5f09ebefd5cddcaeebc1b3cf605f5eaa9700e50f2f2f8b767852", kill_on_drop: false }`
[INFO] [stdout] b89d9e5a3e7f5f09ebefd5cddcaeebc1b3cf605f5eaa9700e50f2f2f8b767852
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+092a284ba0421695f2032c947765429fd7095796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42a0574e2ab9837b931df1d643163e0666aef3560a0a56828b4c0175b2fd7849
[INFO] running `Command { std: "docker" "start" "-a" "42a0574e2ab9837b931df1d643163e0666aef3560a0a56828b4c0175b2fd7849", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling typenum v1.18.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking iana-time-zone v0.1.63
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stderr]     Checking arrayref v0.3.9
[INFO] [stderr]     Checking keccak v0.1.5
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking block-buffer v0.3.3
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling num-bigint v0.1.45
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]     Checking generic-array v0.9.1
[INFO] [stderr]     Checking digest v0.7.6
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking sha3 v0.7.3
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking chrono v0.4.40
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]     Checking bincode v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking kademlia-dht v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]   --> src/node/mod.rs:11:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | use log::{debug, info, log, warn};
[INFO] [stdout]    |                        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]  --> src/protocol.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use log::{log, warn};
[INFO] [stdout]   |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]  --> src/storage.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use log::{info, log};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]   --> src/node/mod.rs:11:24
[INFO] [stdout]    |
[INFO] [stdout] 11 | use log::{debug, info, log, warn};
[INFO] [stdout]    |                        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]  --> src/protocol.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use log::{log, warn};
[INFO] [stdout]   |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]  --> src/storage.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use log::{info, log};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/routing.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         mem::replace(&mut self.nodes, old_bucket);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let _ = mem::replace(&mut self.nodes, old_bucket);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/routing.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |         mem::replace(&mut self.nodes, old_bucket);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let _ = mem::replace(&mut self.nodes, old_bucket);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]  --> src/main.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log::{info, log};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `log`
[INFO] [stdout]  --> src/main.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use log::{info, log};
[INFO] [stdout]   |                 ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.53s
[INFO] running `Command { std: "docker" "inspect" "42a0574e2ab9837b931df1d643163e0666aef3560a0a56828b4c0175b2fd7849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42a0574e2ab9837b931df1d643163e0666aef3560a0a56828b4c0175b2fd7849", kill_on_drop: false }`
[INFO] [stdout] 42a0574e2ab9837b931df1d643163e0666aef3560a0a56828b4c0175b2fd7849