[INFO] fetching crate mudrs-milk 0.0.0...
[INFO] checking mudrs-milk-0.0.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate mudrs-milk 0.0.0 into /workspace/builds/worker-20/source
[INFO] validating manifest of crates.io crate mudrs-milk 0.0.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mudrs-milk 0.0.0
[INFO] finished tweaking crates.io crate mudrs-milk 0.0.0
[INFO] tweaked toml for crates.io crate mudrs-milk 0.0.0 written to /workspace/builds/worker-20/source/Cargo.toml
[INFO] crate crates.io crate mudrs-milk 0.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d071db08e17bd70e9556e4a47e7ab7b1b4f011a032c65799d96142a94e0cb411
[INFO] running `Command { std: "docker" "start" "-a" "d071db08e17bd70e9556e4a47e7ab7b1b4f011a032c65799d96142a94e0cb411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d071db08e17bd70e9556e4a47e7ab7b1b4f011a032c65799d96142a94e0cb411", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d071db08e17bd70e9556e4a47e7ab7b1b4f011a032c65799d96142a94e0cb411", kill_on_drop: false }`
[INFO] [stdout] d071db08e17bd70e9556e4a47e7ab7b1b4f011a032c65799d96142a94e0cb411
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-20/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 909f652df0642f9385f2ac424fcb811cf99d012af14fe3c564c5a2e5d800fa83
[INFO] running `Command { std: "docker" "start" "-a" "909f652df0642f9385f2ac424fcb811cf99d012af14fe3c564c5a2e5d800fa83", kill_on_drop: false }`
[INFO] [stderr]     Checking mudrs-milk v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "909f652df0642f9385f2ac424fcb811cf99d012af14fe3c564c5a2e5d800fa83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "909f652df0642f9385f2ac424fcb811cf99d012af14fe3c564c5a2e5d800fa83", kill_on_drop: false }`
[INFO] [stdout] 909f652df0642f9385f2ac424fcb811cf99d012af14fe3c564c5a2e5d800fa83