[INFO] fetching crate buildrs_playground 0.0.2...
[INFO] checking buildrs_playground-0.0.2 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate buildrs_playground 0.0.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate buildrs_playground 0.0.2 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 buildrs_playground 0.0.2
[INFO] finished tweaking crates.io crate buildrs_playground 0.0.2
[INFO] tweaked toml for crates.io crate buildrs_playground 0.0.2 written to /workspace/builds/worker-4/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] 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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] d6a4077ba93f10f6df4cac06445b4c4d5dbc99720500d2d9d19b58db3aeb2b9a
[INFO] running `Command { std: "docker" "start" "-a" "d6a4077ba93f10f6df4cac06445b4c4d5dbc99720500d2d9d19b58db3aeb2b9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d6a4077ba93f10f6df4cac06445b4c4d5dbc99720500d2d9d19b58db3aeb2b9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6a4077ba93f10f6df4cac06445b4c4d5dbc99720500d2d9d19b58db3aeb2b9a", kill_on_drop: false }`
[INFO] [stdout] d6a4077ba93f10f6df4cac06445b4c4d5dbc99720500d2d9d19b58db3aeb2b9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] a592723449c6cc5b8145b6f7e9189eba981524f005e2a4d6a648e6b7117d8fab
[INFO] running `Command { std: "docker" "start" "-a" "a592723449c6cc5b8145b6f7e9189eba981524f005e2a4d6a648e6b7117d8fab", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling buildrs_playground v0.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: build.rs
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.64s
[INFO] running `Command { std: "docker" "inspect" "a592723449c6cc5b8145b6f7e9189eba981524f005e2a4d6a648e6b7117d8fab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a592723449c6cc5b8145b6f7e9189eba981524f005e2a4d6a648e6b7117d8fab", kill_on_drop: false }`
[INFO] [stdout] a592723449c6cc5b8145b6f7e9189eba981524f005e2a4d6a648e6b7117d8fab