[INFO] fetching crate rpn_calc_karin 0.1.1...
[INFO] checking rpn_calc_karin-0.1.1 against master#e23ae72ac7a393961886ea62df065ebb6def7d51 for pr-126571
[INFO] extracting crate rpn_calc_karin 0.1.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate rpn_calc_karin 0.1.1 on toolchain e23ae72ac7a393961886ea62df065ebb6def7d51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e23ae72ac7a393961886ea62df065ebb6def7d51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rpn_calc_karin 0.1.1
[INFO] finished tweaking crates.io crate rpn_calc_karin 0.1.1
[INFO] tweaked toml for crates.io crate rpn_calc_karin 0.1.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e23ae72ac7a393961886ea62df065ebb6def7d51" "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" "+e23ae72ac7a393961886ea62df065ebb6def7d51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+e23ae72ac7a393961886ea62df065ebb6def7d51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5477196368fb1ce0af9c7a1b97468e305e31c723a4fd52ece3c6a3ee2d9cc744
[INFO] running `Command { std: "docker" "start" "-a" "5477196368fb1ce0af9c7a1b97468e305e31c723a4fd52ece3c6a3ee2d9cc744", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5477196368fb1ce0af9c7a1b97468e305e31c723a4fd52ece3c6a3ee2d9cc744", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5477196368fb1ce0af9c7a1b97468e305e31c723a4fd52ece3c6a3ee2d9cc744", kill_on_drop: false }`
[INFO] [stdout] 5477196368fb1ce0af9c7a1b97468e305e31c723a4fd52ece3c6a3ee2d9cc744
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+e23ae72ac7a393961886ea62df065ebb6def7d51" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f6b8e747037455fb870e6715322edbc017b66d9689ddf16a241ada9bd2b3580
[INFO] running `Command { std: "docker" "start" "-a" "6f6b8e747037455fb870e6715322edbc017b66d9689ddf16a241ada9bd2b3580", kill_on_drop: false }`
[INFO] [stderr]     Checking rpn_calc_karin v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "6f6b8e747037455fb870e6715322edbc017b66d9689ddf16a241ada9bd2b3580", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f6b8e747037455fb870e6715322edbc017b66d9689ddf16a241ada9bd2b3580", kill_on_drop: false }`
[INFO] [stdout] 6f6b8e747037455fb870e6715322edbc017b66d9689ddf16a241ada9bd2b3580
[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.