[INFO] fetching crate art_exercise_2019 0.1.0...
[INFO] checking art_exercise_2019-0.1.0 against master#0a8629bff642c3c3b84bb644c0099194f063b627 for pr-86231
[INFO] extracting crate art_exercise_2019 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate art_exercise_2019 0.1.0 on toolchain 0a8629bff642c3c3b84bb644c0099194f063b627
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0a8629bff642c3c3b84bb644c0099194f063b627" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate art_exercise_2019 0.1.0
[INFO] finished tweaking crates.io crate art_exercise_2019 0.1.0
[INFO] tweaked toml for crates.io crate art_exercise_2019 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0a8629bff642c3c3b84bb644c0099194f063b627" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0a8629bff642c3c3b84bb644c0099194f063b627" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+0a8629bff642c3c3b84bb644c0099194f063b627" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb88dce96c623d39f0bc3cbb4d1756a1d37ca3144e99d950419d96d033a70e15
[INFO] running `Command { std: "docker" "start" "-a" "fb88dce96c623d39f0bc3cbb4d1756a1d37ca3144e99d950419d96d033a70e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb88dce96c623d39f0bc3cbb4d1756a1d37ca3144e99d950419d96d033a70e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb88dce96c623d39f0bc3cbb4d1756a1d37ca3144e99d950419d96d033a70e15", kill_on_drop: false }`
[INFO] [stdout] fb88dce96c623d39f0bc3cbb4d1756a1d37ca3144e99d950419d96d033a70e15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+0a8629bff642c3c3b84bb644c0099194f063b627" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c142a62c18b1d6ef2a2e551351e1c849ab997bd19c0ceef4c4d58f115e48a44f
[INFO] running `Command { std: "docker" "start" "-a" "c142a62c18b1d6ef2a2e551351e1c849ab997bd19c0ceef4c4d58f115e48a44f", kill_on_drop: false }`
[INFO] [stderr]     Checking art_exercise_2019 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "c142a62c18b1d6ef2a2e551351e1c849ab997bd19c0ceef4c4d58f115e48a44f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c142a62c18b1d6ef2a2e551351e1c849ab997bd19c0ceef4c4d58f115e48a44f", kill_on_drop: false }`
[INFO] [stdout] c142a62c18b1d6ef2a2e551351e1c849ab997bd19c0ceef4c4d58f115e48a44f