[INFO] fetching crate json_config 0.1.4...
[INFO] checking json_config-0.1.4 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate json_config 0.1.4 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate json_config 0.1.4 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate json_config 0.1.4
[INFO] finished tweaking crates.io crate json_config 0.1.4
[INFO] tweaked toml for crates.io crate json_config 0.1.4 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84fa427eeed5beb470b3eec9feebebe16766912c7edf4282717c6bad3d96181b
[INFO] running `Command { std: "docker" "start" "-a" "84fa427eeed5beb470b3eec9feebebe16766912c7edf4282717c6bad3d96181b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84fa427eeed5beb470b3eec9feebebe16766912c7edf4282717c6bad3d96181b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84fa427eeed5beb470b3eec9feebebe16766912c7edf4282717c6bad3d96181b", kill_on_drop: false }`
[INFO] [stdout] 84fa427eeed5beb470b3eec9feebebe16766912c7edf4282717c6bad3d96181b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 480d449b8950fe02af894673903fbb5ded74906704fe255df13b822df596417d
[INFO] running `Command { std: "docker" "start" "-a" "480d449b8950fe02af894673903fbb5ded74906704fe255df13b822df596417d", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking json_config v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.97s
[INFO] running `Command { std: "docker" "inspect" "480d449b8950fe02af894673903fbb5ded74906704fe255df13b822df596417d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "480d449b8950fe02af894673903fbb5ded74906704fe255df13b822df596417d", kill_on_drop: false }`
[INFO] [stdout] 480d449b8950fe02af894673903fbb5ded74906704fe255df13b822df596417d