[INFO] cloning repository https://github.com/undo-lang/vm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/undo-lang/vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundo-lang%2Fvm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundo-lang%2Fvm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4bf14ccbf65b8ddcffce65240c67c02730071b2
[INFO] checking undo-lang/vm against try#81275a1445c7502a974118e0c69b795ab60be991 for pr-80243
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundo-lang%2Fvm" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/undo-lang/vm on toolchain 81275a1445c7502a974118e0c69b795ab60be991
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/undo-lang/vm
[INFO] finished tweaking git repo https://github.com/undo-lang/vm
[INFO] tweaked toml for git repo https://github.com/undo-lang/vm written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/undo-lang/vm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "metadata" "--no-deps" "--format-version=1", 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] 46451de7aeea3bdd14e09123b6afb6e1b974cca43ad7fc1a91a7f8194c8086b4
[INFO] running `Command { std: "docker" "start" "-a" "46451de7aeea3bdd14e09123b6afb6e1b974cca43ad7fc1a91a7f8194c8086b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46451de7aeea3bdd14e09123b6afb6e1b974cca43ad7fc1a91a7f8194c8086b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46451de7aeea3bdd14e09123b6afb6e1b974cca43ad7fc1a91a7f8194c8086b4", kill_on_drop: false }`
[INFO] [stdout] 46451de7aeea3bdd14e09123b6afb6e1b974cca43ad7fc1a91a7f8194c8086b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+81275a1445c7502a974118e0c69b795ab60be991" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1eb56b8abcb160397db5a6ea08bff7ee04dc5e6bfeb2c8f0c5cd846e088fcc36
[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" "1eb56b8abcb160397db5a6ea08bff7ee04dc5e6bfeb2c8f0c5cd846e088fcc36", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling serde_derive v1.0.100
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]     Checking serde_json v1.0.3
[INFO] [stderr]     Checking undo-vm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.92s
[INFO] running `Command { std: "docker" "inspect" "1eb56b8abcb160397db5a6ea08bff7ee04dc5e6bfeb2c8f0c5cd846e088fcc36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eb56b8abcb160397db5a6ea08bff7ee04dc5e6bfeb2c8f0c5cd846e088fcc36", kill_on_drop: false }`
[INFO] [stdout] 1eb56b8abcb160397db5a6ea08bff7ee04dc5e6bfeb2c8f0c5cd846e088fcc36