[INFO] fetching crate iota 0.2.3...
[INFO] checking iota-0.2.3 against master#8f359beca4e58bc3ae795a666301a8f47023044c for pr-121545
[INFO] extracting crate iota 0.2.3 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate iota 0.2.3 on toolchain 8f359beca4e58bc3ae795a666301a8f47023044c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate iota 0.2.3
[INFO] finished tweaking crates.io crate iota 0.2.3
[INFO] tweaked toml for crates.io crate iota 0.2.3 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 566923e0e42dfbc0ba4c0a7665ecf500fd3412bd3f286b21f159e99c5636b01f
[INFO] running `Command { std: "docker" "start" "-a" "566923e0e42dfbc0ba4c0a7665ecf500fd3412bd3f286b21f159e99c5636b01f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "566923e0e42dfbc0ba4c0a7665ecf500fd3412bd3f286b21f159e99c5636b01f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "566923e0e42dfbc0ba4c0a7665ecf500fd3412bd3f286b21f159e99c5636b01f", kill_on_drop: false }`
[INFO] [stdout] 566923e0e42dfbc0ba4c0a7665ecf500fd3412bd3f286b21f159e99c5636b01f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3222541ca97075d76d7ce4780b6e58d7dbeb93d198cfe2e9301c6276e6f1477
[INFO] running `Command { std: "docker" "start" "-a" "c3222541ca97075d76d7ce4780b6e58d7dbeb93d198cfe2e9301c6276e6f1477", kill_on_drop: false }`
[INFO] [stderr]     Checking iota v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "c3222541ca97075d76d7ce4780b6e58d7dbeb93d198cfe2e9301c6276e6f1477", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3222541ca97075d76d7ce4780b6e58d7dbeb93d198cfe2e9301c6276e6f1477", kill_on_drop: false }`
[INFO] [stdout] c3222541ca97075d76d7ce4780b6e58d7dbeb93d198cfe2e9301c6276e6f1477
[ERROR] this task or one of its parent failed!
[ERROR] error sending request for url (https://crater.rust-lang.org/agent-api/record-progress): connection closed before message completed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.