[INFO] fetching crate mubleping-rs 0.1.0...
[INFO] testing mubleping-rs-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate mubleping-rs 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate mubleping-rs 0.1.0
[INFO] finished tweaking crates.io crate mubleping-rs 0.1.0
[INFO] tweaked toml for crates.io crate mubleping-rs 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mubleping-rs 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 38034ddca79b16bac0d480d44fb7a067223153f3c51c6c9a1adf769984439ec5
[INFO] running `Command { std: "docker" "start" "-a" "38034ddca79b16bac0d480d44fb7a067223153f3c51c6c9a1adf769984439ec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "38034ddca79b16bac0d480d44fb7a067223153f3c51c6c9a1adf769984439ec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38034ddca79b16bac0d480d44fb7a067223153f3c51c6c9a1adf769984439ec5", kill_on_drop: false }`
[INFO] [stdout] 38034ddca79b16bac0d480d44fb7a067223153f3c51c6c9a1adf769984439ec5
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b3ad724275c1626e408fc8d1271dc6c2be277201249f06ff26c971dc57008f9
[INFO] running `Command { std: "docker" "start" "-a" "3b3ad724275c1626e408fc8d1271dc6c2be277201249f06ff26c971dc57008f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling virtue v0.0.18
[INFO] [stderr]    Compiling unty v0.0.4
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling bincode_derive v2.0.1
[INFO] [stderr]    Compiling bincode v2.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling mubleping-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.50s
[INFO] running `Command { std: "docker" "inspect" "3b3ad724275c1626e408fc8d1271dc6c2be277201249f06ff26c971dc57008f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b3ad724275c1626e408fc8d1271dc6c2be277201249f06ff26c971dc57008f9", kill_on_drop: false }`
[INFO] [stdout] 3b3ad724275c1626e408fc8d1271dc6c2be277201249f06ff26c971dc57008f9
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b05433a077d56955cdafc664ab3461972d5b67e0682530169f834fc6d50f99e
[INFO] running `Command { std: "docker" "start" "-a" "0b05433a077d56955cdafc664ab3461972d5b67e0682530169f834fc6d50f99e", kill_on_drop: false }`
[INFO] [stderr]    Compiling mubleping-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `thread`
[INFO] [stdout]    --> src/lib.rs:132:9
[INFO] [stdout]     |
[INFO] [stdout] 132 |         thread::spawn(|| {
[INFO] [stdout]     |         ^^^^^^ use of unresolved module or unlinked crate `thread`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `thread`, use `cargo add thread` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]     |
[INFO] [stdout]  83 +     use std::thread;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/lib.rs:91:14
[INFO] [stdout]    |
[INFO] [stdout] 91 |         let (size, source) = socket.recv_from(&mut buf).expect("Failed to receive data");
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ping`
[INFO] [stdout]   --> src/lib.rs:93:14
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let (ping, identifier): (u32, u64) = bincode::decode_from_slice(&buf, bincode::config::standard().with_big_endian()).unwrap().0;
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_ping`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mubleping-rs` (lib test) due to 1 previous error; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0b05433a077d56955cdafc664ab3461972d5b67e0682530169f834fc6d50f99e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b05433a077d56955cdafc664ab3461972d5b67e0682530169f834fc6d50f99e", kill_on_drop: false }`
[INFO] [stdout] 0b05433a077d56955cdafc664ab3461972d5b67e0682530169f834fc6d50f99e