[INFO] cloning repository https://github.com/Ch4s3/rust_guessing_game
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ch4s3/rust_guessing_game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCh4s3%2Frust_guessing_game", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCh4s3%2Frust_guessing_game'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7256f51d5100c30369ecc1028113411494d5fe3e
[INFO] checking Ch4s3/rust_guessing_game against master#e22b61bff0bdd08be7665607cb7be3748c8a35d2 for pr-74627
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCh4s3%2Frust_guessing_game" "/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/Ch4s3/rust_guessing_game on toolchain e22b61bff0bdd08be7665607cb7be3748c8a35d2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Ch4s3/rust_guessing_game
[INFO] finished tweaking git repo https://github.com/Ch4s3/rust_guessing_game
[INFO] tweaked toml for git repo https://github.com/Ch4s3/rust_guessing_game written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Ch4s3/rust_guessing_game already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "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[INFO] the lockfile is outdated, regenerating it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" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4cb4562af0cf3c9f12f3803da2a2d8973ad4c7ac22538a3451d48e867c91b208
[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" "4cb4562af0cf3c9f12f3803da2a2d8973ad4c7ac22538a3451d48e867c91b208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4cb4562af0cf3c9f12f3803da2a2d8973ad4c7ac22538a3451d48e867c91b208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cb4562af0cf3c9f12f3803da2a2d8973ad4c7ac22538a3451d48e867c91b208", kill_on_drop: false }`
[INFO] [stdout] 4cb4562af0cf3c9f12f3803da2a2d8973ad4c7ac22538a3451d48e867c91b208
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+e22b61bff0bdd08be7665607cb7be3748c8a35d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2e76aecb4efe6f7f7018a50d814de7f1498e0982c62f24dc716bbb9c449755d
[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" "f2e76aecb4efe6f7f7018a50d814de7f1498e0982c62f24dc716bbb9c449755d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.06s
[INFO] running `Command { std: "docker" "inspect" "f2e76aecb4efe6f7f7018a50d814de7f1498e0982c62f24dc716bbb9c449755d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2e76aecb4efe6f7f7018a50d814de7f1498e0982c62f24dc716bbb9c449755d", kill_on_drop: false }`
[INFO] [stdout] f2e76aecb4efe6f7f7018a50d814de7f1498e0982c62f24dc716bbb9c449755d