[INFO] fetching crate host-chain 0.3.12...
[INFO] checking host-chain-0.3.12 against try#88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c for pr-154887
[INFO] extracting crate host-chain 0.3.12 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate host-chain 0.3.12
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate host-chain 0.3.12
[INFO] tweaked toml for crates.io crate host-chain 0.3.12 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate host-chain 0.3.12 on toolchain 88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate host-chain 0.3.12 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" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d498e83bdefc376655d9870701ac1c77acd03d9fa882b3b2a64c32def5439fe
[INFO] running `Command { std: "docker" "start" "-a" "8d498e83bdefc376655d9870701ac1c77acd03d9fa882b3b2a64c32def5439fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d498e83bdefc376655d9870701ac1c77acd03d9fa882b3b2a64c32def5439fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d498e83bdefc376655d9870701ac1c77acd03d9fa882b3b2a64c32def5439fe", kill_on_drop: false }`
[INFO] [stdout] 8d498e83bdefc376655d9870701ac1c77acd03d9fa882b3b2a64c32def5439fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+88b8a1c6e3a6f6f8a2ed6b6a9a74e0ef1862f72c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afa910c6dbbcdc71cc24e7be9752bd9873541798bc386df7aac2063e4d751be2
[INFO] running `Command { std: "docker" "start" "-a" "afa910c6dbbcdc71cc24e7be9752bd9873541798bc386df7aac2063e4d751be2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.183
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[INFO] [stderr]    Compiling derive_more-impl v2.1.1
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[INFO] [stderr]     Checking rand v0.10.0
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[INFO] [stderr]     Checking jiff v0.2.23
[INFO] [stderr]     Checking tracing-subscriber v0.3.23
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[INFO] [stderr]    Compiling zstd-safe v7.2.4
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[INFO] [stderr]     Checking smoldot v0.21.0
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[INFO] [stderr]     Checking host-chain v0.3.12 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `layer::SubscriberExt`
[INFO] [stdout]  --> tests/tracing_spans.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tracing_subscriber::{layer::SubscriberExt, Layer};
[INFO] [stdout]   |                          ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EventCapture` is never constructed
[INFO] [stdout]   --> tests/tracing_spans.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct EventCapture {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MessageCapture` is never constructed
[INFO] [stdout]   --> tests/tracing_spans.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 | struct MessageCapture {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 51s
[INFO] running `Command { std: "docker" "inspect" "afa910c6dbbcdc71cc24e7be9752bd9873541798bc386df7aac2063e4d751be2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afa910c6dbbcdc71cc24e7be9752bd9873541798bc386df7aac2063e4d751be2", kill_on_drop: false }`
[INFO] [stdout] afa910c6dbbcdc71cc24e7be9752bd9873541798bc386df7aac2063e4d751be2