[INFO] fetching crate kcp-tokio 0.3.4...
[INFO] building kcp-tokio-0.3.4 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate kcp-tokio 0.3.4 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate kcp-tokio 0.3.4
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate kcp-tokio 0.3.4
[INFO] tweaked toml for crates.io crate kcp-tokio 0.3.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate kcp-tokio 0.3.4 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate kcp-tokio 0.3.4 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v4.5.42
[INFO] [stderr]   Downloaded clap_builder v4.5.42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a38be232653c32f06b7c35f9f770da153a8dbc81be5fe9d15ad531954e77624
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[INFO] [stdout] d921d624bec012238158e40c5cc7f8ac9be1316452c1d0dde32430984934759e
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[INFO] [stderr]    Compiling smallvec v1.15.1
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[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling pin-project v1.1.10
[INFO] [stderr]    Compiling tracing v0.1.41
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[INFO] [stderr]    Compiling kcp-tokio v0.3.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `start_background_tasks_unconnected` is never used
[INFO] [stdout]    --> src/async_kcp/stream.rs:283:14
[INFO] [stdout]     |
[INFO] [stdout]  42 | impl KcpStream {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 283 |     async fn start_background_tasks_unconnected(&mut self) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.97s
[INFO] running `Command { std: "docker" "inspect" "d921d624bec012238158e40c5cc7f8ac9be1316452c1d0dde32430984934759e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d921d624bec012238158e40c5cc7f8ac9be1316452c1d0dde32430984934759e", kill_on_drop: false }`
[INFO] [stdout] d921d624bec012238158e40c5cc7f8ac9be1316452c1d0dde32430984934759e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2c68444c809c8fcb4aaffbdfde02be88e63d542c5e14ebd6b674d08253bb874
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[INFO] [stderr]    Compiling kcp-tokio v0.3.4 (/opt/rustwide/workdir)
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[INFO] [stdout] warning: method `start_background_tasks_unconnected` is never used
[INFO] [stdout]    --> src/async_kcp/stream.rs:283:14
[INFO] [stdout]     |
[INFO] [stdout]  42 | impl KcpStream {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 283 |     async fn start_background_tasks_unconnected(&mut self) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.5.1
[INFO] [stdout] warning: field `connections` is never read
[INFO] [stdout]   --> examples/perf_test_server.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct ServerStats {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] 21 |     connections: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ServerStats` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `debug`
[INFO] [stdout]  --> tests/simple_echo_debug.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tracing::{debug, info};
[INFO] [stdout]   |               ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `start_background_tasks_unconnected` is never used
[INFO] [stdout]    --> src/async_kcp/stream.rs:283:14
[INFO] [stdout]     |
[INFO] [stdout]  42 | impl KcpStream {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 283 |     async fn start_background_tasks_unconnected(&mut self) -> Result<()> {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 41.73s
[INFO] running `Command { std: "docker" "inspect" "e2c68444c809c8fcb4aaffbdfde02be88e63d542c5e14ebd6b674d08253bb874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2c68444c809c8fcb4aaffbdfde02be88e63d542c5e14ebd6b674d08253bb874", kill_on_drop: false }`
[INFO] [stdout] e2c68444c809c8fcb4aaffbdfde02be88e63d542c5e14ebd6b674d08253bb874