[INFO] fetching crate serde_variant 0.1.0...
[INFO] checking serde_variant-0.1.0 against try#d990716b6a1fdde1300748828a9c9e79dfd0b898 for pr-74846
[INFO] extracting crate serde_variant 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate serde_variant 0.1.0 on toolchain d990716b6a1fdde1300748828a9c9e79dfd0b898
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_variant 0.1.0
[INFO] finished tweaking crates.io crate serde_variant 0.1.0
[INFO] tweaked toml for crates.io crate serde_variant 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b99106f1d0ee657c7bd74655816d3fe6edd7c078545bbe82375cad80c018668d
[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" "b99106f1d0ee657c7bd74655816d3fe6edd7c078545bbe82375cad80c018668d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b99106f1d0ee657c7bd74655816d3fe6edd7c078545bbe82375cad80c018668d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b99106f1d0ee657c7bd74655816d3fe6edd7c078545bbe82375cad80c018668d", kill_on_drop: false }`
[INFO] [stdout] b99106f1d0ee657c7bd74655816d3fe6edd7c078545bbe82375cad80c018668d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+d990716b6a1fdde1300748828a9c9e79dfd0b898" "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] 79c4c09212ffa006ae904c95e013425cfdd618e9f28dd59289232e1c469a96e3
[INFO] running `Command { std: "docker" "start" "-a" "79c4c09212ffa006ae904c95e013425cfdd618e9f28dd59289232e1c469a96e3", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking serde_variant v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.43s
[INFO] running `Command { std: "docker" "inspect" "79c4c09212ffa006ae904c95e013425cfdd618e9f28dd59289232e1c469a96e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79c4c09212ffa006ae904c95e013425cfdd618e9f28dd59289232e1c469a96e3", kill_on_drop: false }`
[INFO] [stdout] 79c4c09212ffa006ae904c95e013425cfdd618e9f28dd59289232e1c469a96e3