[INFO] cloning repository https://github.com/hashkid/peer-discovery
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hashkid/peer-discovery" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhashkid%2Fpeer-discovery", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhashkid%2Fpeer-discovery'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b131a26fd2db7195c0f12baf8c792d63d8d5449e
[INFO] checking hashkid/peer-discovery against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhashkid%2Fpeer-discovery" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hashkid/peer-discovery
[INFO] finished tweaking git repo https://github.com/hashkid/peer-discovery
[INFO] tweaked toml for git repo https://github.com/hashkid/peer-discovery written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hashkid/peer-discovery on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hashkid/peer-discovery 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0bfad9d8315aec56afb00103520dd24f594ad54c107e3428479b1320587639af
[INFO] running `Command { std: "docker" "start" "-a" "0bfad9d8315aec56afb00103520dd24f594ad54c107e3428479b1320587639af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0bfad9d8315aec56afb00103520dd24f594ad54c107e3428479b1320587639af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bfad9d8315aec56afb00103520dd24f594ad54c107e3428479b1320587639af", kill_on_drop: false }`
[INFO] [stdout] 0bfad9d8315aec56afb00103520dd24f594ad54c107e3428479b1320587639af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c31ffb8311d89171c45472fa7e62d74800a32a286920c2724d7c5294e52f7d5
[INFO] running `Command { std: "docker" "start" "-a" "9c31ffb8311d89171c45472fa7e62d74800a32a286920c2724d7c5294e52f7d5", kill_on_drop: false }`
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[INFO] [stderr]     Checking peer_discover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `env::args`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env::args, num::NonZeroUsize, str::FromStr, time::Duration};
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `GetRecordOk`, `RecordKey`, and `Record`
[INFO] [stdout]  --> src/main.rs:3:89
[INFO] [stdout]   |
[INFO] [stdout] 3 | use libp2p::{futures::StreamExt, identify, identity::Keypair, kad::{store::MemoryStore, GetRecordOk, Record, RecordKey}, noise, swarm::{N...
[INFO] [stdout]   |                                                                                         ^^^^^^^^^^^  ^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `env::args`
[INFO] [stdout]  --> src/main.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{env::args, num::NonZeroUsize, str::FromStr, time::Duration};
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `GetRecordOk`, `RecordKey`, and `Record`
[INFO] [stdout]  --> src/main.rs:3:89
[INFO] [stdout]   |
[INFO] [stdout] 3 | use libp2p::{futures::StreamExt, identify, identity::Keypair, kad::{store::MemoryStore, GetRecordOk, Record, RecordKey}, noise, swarm::{N...
[INFO] [stdout]   |                                                                                         ^^^^^^^^^^^  ^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to_search`
[INFO] [stdout]   --> src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let to_search = PeerId::random();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_to_search`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `discover` is never used
[INFO] [stdout]    --> src/main.rs:150:4
[INFO] [stdout]     |
[INFO] [stdout] 150 | fn discover(swarm: &mut Swarm<DiscoveryBehaviour>, to_search: PeerId) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `put` is never used
[INFO] [stdout]    --> src/main.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn put(swarm: &mut Swarm<DiscoveryBehaviour>) {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<SwarmBuilder<libp2p::builder::phase::provider::Tokio, libp2p::builder::phase::swarm::SwarmPhase<impl libp2p::builder::phase::AuthenticatedMultiplexedTransport, DiscoveryBehaviour>>, Infallible>
[INFO] [stdout]   --> src/main.rs:18:21
[INFO] [stdout]    |
[INFO] [stdout] 18 |       let mut swarm = if args.len() >= 2 {
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 19 | |             SwarmBuilder::with_new_identity()
[INFO] [stdout] 20 | |         } else {
[INFO] [stdout] 21 | |             let keypair = Keypair::ed25519_from_bytes([1; 32]).expect("error key");
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |         }).expect("failed build swarm")
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `to_search`
[INFO] [stdout]   --> src/main.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     let to_search = PeerId::random();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_to_search`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `discover` is never used
[INFO] [stdout]    --> src/main.rs:150:4
[INFO] [stdout]     |
[INFO] [stdout] 150 | fn discover(swarm: &mut Swarm<DiscoveryBehaviour>, to_search: PeerId) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `put` is never used
[INFO] [stdout]    --> src/main.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn put(swarm: &mut Swarm<DiscoveryBehaviour>) {
[INFO] [stdout]     |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<SwarmBuilder<libp2p::builder::phase::provider::Tokio, libp2p::builder::phase::swarm::SwarmPhase<impl libp2p::builder::phase::AuthenticatedMultiplexedTransport, DiscoveryBehaviour>>, Infallible>
[INFO] [stdout]   --> src/main.rs:18:21
[INFO] [stdout]    |
[INFO] [stdout] 18 |       let mut swarm = if args.len() >= 2 {
[INFO] [stdout]    |  _____________________^
[INFO] [stdout] 19 | |             SwarmBuilder::with_new_identity()
[INFO] [stdout] 20 | |         } else {
[INFO] [stdout] 21 | |             let keypair = Keypair::ed25519_from_bytes([1; 32]).expect("error key");
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |         }).expect("failed build swarm")
[INFO] [stdout]    | |__________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `peer_discover` (bin "peer_discover") due to 1 previous error; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `peer_discover` (bin "peer_discover" test) due to 1 previous error; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9c31ffb8311d89171c45472fa7e62d74800a32a286920c2724d7c5294e52f7d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c31ffb8311d89171c45472fa7e62d74800a32a286920c2724d7c5294e52f7d5", kill_on_drop: false }`
[INFO] [stdout] 9c31ffb8311d89171c45472fa7e62d74800a32a286920c2724d7c5294e52f7d5
