[INFO] fetching crate multiplexed-connection 0.4.0...
[INFO] checking multiplexed-connection-0.4.0 against master#19dd9535408db0f1ff3d16613619076aef524d19 for pr-115950
[INFO] extracting crate multiplexed-connection 0.4.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate multiplexed-connection 0.4.0 on toolchain 19dd9535408db0f1ff3d16613619076aef524d19
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate multiplexed-connection 0.4.0
[INFO] finished tweaking crates.io crate multiplexed-connection 0.4.0
[INFO] tweaked toml for crates.io crate multiplexed-connection 0.4.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate multiplexed-connection 0.4.0 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" "+19dd9535408db0f1ff3d16613619076aef524d19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-log v0.1.2
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[INFO] [stderr]   Downloaded jsonrpc-derive v18.0.0
[INFO] [stderr]   Downloaded jsonrpc-core-client v18.0.0
[INFO] [stderr]   Downloaded async-stream-impl v0.3.2
[INFO] [stderr]   Downloaded vte_generate_state_changes v0.1.1
[INFO] [stderr]   Downloaded tracing-attributes v0.1.19
[INFO] [stderr]   Downloaded mio v0.8.0
[INFO] [stderr]   Downloaded vte v0.10.1
[INFO] [stderr]   Downloaded tracing v0.1.31
[INFO] [stderr]   Downloaded tracing-subscriber v0.3.9
[INFO] [stderr]   Downloaded rstest v0.12.0
[INFO] [stderr]   Downloaded cs-utils v0.14.0
[INFO] [stderr]   Downloaded tracing-core v0.1.22
[INFO] [stderr]   Downloaded jsonrpc-pubsub v18.0.0
[INFO] [stderr]   Downloaded jsonrpc-client-transports v18.0.0
[INFO] [stderr]   Downloaded anyhow v1.0.54
[INFO] [stderr]   Downloaded async-stream v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37172472b11c6027a316181acbf35fccc0347cece5d3e8f786c8a59ac04fb50e
[INFO] running `Command { std: "docker" "start" "-a" "37172472b11c6027a316181acbf35fccc0347cece5d3e8f786c8a59ac04fb50e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37172472b11c6027a316181acbf35fccc0347cece5d3e8f786c8a59ac04fb50e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37172472b11c6027a316181acbf35fccc0347cece5d3e8f786c8a59ac04fb50e", kill_on_drop: false }`
[INFO] [stdout] 37172472b11c6027a316181acbf35fccc0347cece5d3e8f786c8a59ac04fb50e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+19dd9535408db0f1ff3d16613619076aef524d19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cab1eba9545685430714e907d14b546f17102f6ec3f410924be8a95595434915
[INFO] running `Command { std: "docker" "start" "-a" "cab1eba9545685430714e907d14b546f17102f6ec3f410924be8a95595434915", kill_on_drop: false }`
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[INFO] [stderr]     Checking multiplexed-connection v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `off_data` is never used
[INFO] [stdout]   --> src/multiplexed_connection/rpc/rpc_channel/remote_rpc_channel_event.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl RemoteRpcChannelEvent {
[INFO] [stdout]    | -------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 53 |     pub fn off_data(&mut self, data_source: TDataReader) -> Result<()> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.27s
[INFO] running `Command { std: "docker" "inspect" "cab1eba9545685430714e907d14b546f17102f6ec3f410924be8a95595434915", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cab1eba9545685430714e907d14b546f17102f6ec3f410924be8a95595434915", kill_on_drop: false }`
[INFO] [stdout] cab1eba9545685430714e907d14b546f17102f6ec3f410924be8a95595434915