[INFO] fetching crate substrate-serializer 1.0.0...
[INFO] checking substrate-serializer-1.0.0 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate substrate-serializer 1.0.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate substrate-serializer 1.0.0 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate substrate-serializer 1.0.0
[INFO] finished tweaking crates.io crate substrate-serializer 1.0.0
[INFO] tweaked toml for crates.io crate substrate-serializer 1.0.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0af67dd822dca0eba0946a6b8918c824c2da83218e7608a3b3a176447dea0325
[INFO] running `Command { std: "docker" "start" "-a" "0af67dd822dca0eba0946a6b8918c824c2da83218e7608a3b3a176447dea0325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0af67dd822dca0eba0946a6b8918c824c2da83218e7608a3b3a176447dea0325", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0af67dd822dca0eba0946a6b8918c824c2da83218e7608a3b3a176447dea0325", kill_on_drop: false }`
[INFO] [stdout] 0af67dd822dca0eba0946a6b8918c824c2da83218e7608a3b3a176447dea0325
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b5dbccc72a5bbdc2adf7d43e573645b94509704e67d47eca0699be2b0759d95
[INFO] running `Command { std: "docker" "start" "-a" "3b5dbccc72a5bbdc2adf7d43e573645b94509704e67d47eca0699be2b0759d95", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking substrate-serializer v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.16s
[INFO] running `Command { std: "docker" "inspect" "3b5dbccc72a5bbdc2adf7d43e573645b94509704e67d47eca0699be2b0759d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b5dbccc72a5bbdc2adf7d43e573645b94509704e67d47eca0699be2b0759d95", kill_on_drop: false }`
[INFO] [stdout] 3b5dbccc72a5bbdc2adf7d43e573645b94509704e67d47eca0699be2b0759d95