[INFO] fetching crate diffin 0.0.0...
[INFO] checking diffin-0.0.0 against master#4e1f5d90bca45207605a88e39b1f76abcdb85d2f for pr-123962
[INFO] extracting crate diffin 0.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate diffin 0.0.0 on toolchain 4e1f5d90bca45207605a88e39b1f76abcdb85d2f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e1f5d90bca45207605a88e39b1f76abcdb85d2f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate diffin 0.0.0
[INFO] finished tweaking crates.io crate diffin 0.0.0
[INFO] tweaked toml for crates.io crate diffin 0.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4e1f5d90bca45207605a88e39b1f76abcdb85d2f" "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" "+4e1f5d90bca45207605a88e39b1f76abcdb85d2f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+4e1f5d90bca45207605a88e39b1f76abcdb85d2f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ead381eb9c1a39dff30a1dca159189fc0e16c572b692e9324c0cbef6f086828e
[INFO] running `Command { std: "docker" "start" "-a" "ead381eb9c1a39dff30a1dca159189fc0e16c572b692e9324c0cbef6f086828e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ead381eb9c1a39dff30a1dca159189fc0e16c572b692e9324c0cbef6f086828e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ead381eb9c1a39dff30a1dca159189fc0e16c572b692e9324c0cbef6f086828e", kill_on_drop: false }`
[INFO] [stdout] ead381eb9c1a39dff30a1dca159189fc0e16c572b692e9324c0cbef6f086828e
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+4e1f5d90bca45207605a88e39b1f76abcdb85d2f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe45896e020b0d56260301c857cc1baa5f2bc54d6a5750c4cb4e7040a7c474d8
[INFO] running `Command { std: "docker" "start" "-a" "fe45896e020b0d56260301c857cc1baa5f2bc54d6a5750c4cb4e7040a7c474d8", kill_on_drop: false }`
[INFO] [stderr]     Checking diffin v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] running `Command { std: "docker" "inspect" "fe45896e020b0d56260301c857cc1baa5f2bc54d6a5750c4cb4e7040a7c474d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe45896e020b0d56260301c857cc1baa5f2bc54d6a5750c4cb4e7040a7c474d8", kill_on_drop: false }`
[INFO] [stdout] fe45896e020b0d56260301c857cc1baa5f2bc54d6a5750c4cb4e7040a7c474d8
[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.