[INFO] fetching crate com 0.2.0...
[INFO] checking com-0.2.0 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate com 0.2.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate com 0.2.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate com 0.2.0
[INFO] finished tweaking crates.io crate com 0.2.0
[INFO] tweaked toml for crates.io crate com 0.2.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f73c0766e74019bcae48c656ee162a3c45756fc5a0b1d3e282517c22cf90db0a
[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" "f73c0766e74019bcae48c656ee162a3c45756fc5a0b1d3e282517c22cf90db0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f73c0766e74019bcae48c656ee162a3c45756fc5a0b1d3e282517c22cf90db0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f73c0766e74019bcae48c656ee162a3c45756fc5a0b1d3e282517c22cf90db0a", kill_on_drop: false }`
[INFO] [stdout] f73c0766e74019bcae48c656ee162a3c45756fc5a0b1d3e282517c22cf90db0a
[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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 845f1c2418e0a362d1bbd93ba204d39a73d6f9cecbb3d8ba2aa7cd6491230cbd
[INFO] running `Command { std: "docker" "start" "-a" "845f1c2418e0a362d1bbd93ba204d39a73d6f9cecbb3d8ba2aa7cd6491230cbd", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]    Compiling com_macros_support v0.2.0
[INFO] [stderr]    Compiling com_macros v0.2.0
[INFO] [stderr]     Checking com v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.94s
[INFO] running `Command { std: "docker" "inspect" "845f1c2418e0a362d1bbd93ba204d39a73d6f9cecbb3d8ba2aa7cd6491230cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "845f1c2418e0a362d1bbd93ba204d39a73d6f9cecbb3d8ba2aa7cd6491230cbd", kill_on_drop: false }`
[INFO] [stdout] 845f1c2418e0a362d1bbd93ba204d39a73d6f9cecbb3d8ba2aa7cd6491230cbd
