[INFO] fetching crate screwsat 2.1.5...
[INFO] checking screwsat-2.1.5 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate screwsat 2.1.5 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate screwsat 2.1.5 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate screwsat 2.1.5
[INFO] finished tweaking crates.io crate screwsat 2.1.5
[INFO] tweaked toml for crates.io crate screwsat 2.1.5 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate screwsat 2.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f88998a14bb975aabeeff6b472b6ad2c86f02b6596028f17de94ca19919091f1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f88998a14bb975aabeeff6b472b6ad2c86f02b6596028f17de94ca19919091f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f88998a14bb975aabeeff6b472b6ad2c86f02b6596028f17de94ca19919091f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f88998a14bb975aabeeff6b472b6ad2c86f02b6596028f17de94ca19919091f1", kill_on_drop: false }`
[INFO] [stdout] f88998a14bb975aabeeff6b472b6ad2c86f02b6596028f17de94ca19919091f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be00d120447f14d0c1e0ff8a2b93783a992adc6fc1a6bddd49fe65855f006423
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "be00d120447f14d0c1e0ff8a2b93783a992adc6fc1a6bddd49fe65855f006423", kill_on_drop: false }`
[INFO] [stderr]     Checking screwsat v2.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.94s
[INFO] running `Command { std: "docker" "inspect" "be00d120447f14d0c1e0ff8a2b93783a992adc6fc1a6bddd49fe65855f006423", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be00d120447f14d0c1e0ff8a2b93783a992adc6fc1a6bddd49fe65855f006423", kill_on_drop: false }`
[INFO] [stdout] be00d120447f14d0c1e0ff8a2b93783a992adc6fc1a6bddd49fe65855f006423