[INFO] cloning repository https://github.com/wangzhf/crates-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wangzhf/crates-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangzhf%2Fcrates-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangzhf%2Fcrates-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40ae52fc1c53cf1576e1bfc5e9261dd905b13b11
[INFO] checking wangzhf/crates-learning against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwangzhf%2Fcrates-learning" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wangzhf/crates-learning on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wangzhf/crates-learning
[INFO] removed workspace from git repo https://github.com/wangzhf/crates-learning
[INFO] finished tweaking git repo https://github.com/wangzhf/crates-learning
[INFO] tweaked toml for git repo https://github.com/wangzhf/crates-learning written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/wangzhf/crates-learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a99cd910043b9b95ab5a1d0e81068c7c74f4b71a17633ef21c96f2e6a1cf19f
[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" "3a99cd910043b9b95ab5a1d0e81068c7c74f4b71a17633ef21c96f2e6a1cf19f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a99cd910043b9b95ab5a1d0e81068c7c74f4b71a17633ef21c96f2e6a1cf19f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a99cd910043b9b95ab5a1d0e81068c7c74f4b71a17633ef21c96f2e6a1cf19f", kill_on_drop: false }`
[INFO] [stdout] 3a99cd910043b9b95ab5a1d0e81068c7c74f4b71a17633ef21c96f2e6a1cf19f
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 61d55661d11d4489b6b3beb2e51f3ff4a597ef12a88a0ca712b8c16cd84de670
[INFO] running `Command { std: "docker" "start" "-a" "61d55661d11d4489b6b3beb2e51f3ff4a597ef12a88a0ca712b8c16cd84de670", kill_on_drop: false }`
[INFO] [stderr]     Checking crates-learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "61d55661d11d4489b6b3beb2e51f3ff4a597ef12a88a0ca712b8c16cd84de670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61d55661d11d4489b6b3beb2e51f3ff4a597ef12a88a0ca712b8c16cd84de670", kill_on_drop: false }`
[INFO] [stdout] 61d55661d11d4489b6b3beb2e51f3ff4a597ef12a88a0ca712b8c16cd84de670