[INFO] cloning repository https://github.com/71e6fd52/bk2d-server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/71e6fd52/bk2d-server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F71e6fd52%2Fbk2d-server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F71e6fd52%2Fbk2d-server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a8956c15b4edc6fa3a2f19d75c38924f1b6655d
[INFO] testing 71e6fd52/bk2d-server against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F71e6fd52%2Fbk2d-server" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/71e6fd52/bk2d-server on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/71e6fd52/bk2d-server
[INFO] finished tweaking git repo https://github.com/71e6fd52/bk2d-server
[INFO] tweaked toml for git repo https://github.com/71e6fd52/bk2d-server written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/71e6fd52/bk2d-server already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "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] 5461155b7fecc72e1237154736dbf35a814077665cba7dd0b38b107f85cb6d81
[INFO] running `Command { std: "docker" "start" "-a" "5461155b7fecc72e1237154736dbf35a814077665cba7dd0b38b107f85cb6d81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5461155b7fecc72e1237154736dbf35a814077665cba7dd0b38b107f85cb6d81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5461155b7fecc72e1237154736dbf35a814077665cba7dd0b38b107f85cb6d81", kill_on_drop: false }`
[INFO] [stdout] 5461155b7fecc72e1237154736dbf35a814077665cba7dd0b38b107f85cb6d81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--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] eb5e807881022bfa1704b294dc19ac168c9859e2d4872461f3e1a1ddc7aebbd8
[INFO] running `Command { std: "docker" "start" "-a" "eb5e807881022bfa1704b294dc19ac168c9859e2d4872461f3e1a1ddc7aebbd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling async-lock v2.4.0
[INFO] [stderr]    Compiling socket2 v0.4.4
[INFO] [stderr]    Compiling lexpr-macros v0.2.1
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.8
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling lexpr v0.2.6
[INFO] [stderr]    Compiling polling v2.2.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling async-io v1.6.0
[INFO] [stderr]    Compiling async-global-executor v2.0.2
[INFO] [stderr]    Compiling serde-lexpr v0.1.2
[INFO] [stderr]    Compiling async-std v1.10.0
[INFO] [stderr]    Compiling futures-executor v0.3.21
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling bk2d v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'int_abs_diff'
[INFO] [stdout]   --> src/utils.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |         (self.0.abs_diff(other.0) + self.1.abs_diff(other.1)).into()
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #89492 <https://github.com/rust-lang/rust/issues/89492> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'int_abs_diff'
[INFO] [stdout]   --> src/utils.rs:30:44
[INFO] [stdout]    |
[INFO] [stdout] 30 |         (self.0.abs_diff(other.0) + self.1.abs_diff(other.1)).into()
[INFO] [stdout]    |                                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #89492 <https://github.com/rust-lang/rust/issues/89492> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bk2d` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "eb5e807881022bfa1704b294dc19ac168c9859e2d4872461f3e1a1ddc7aebbd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb5e807881022bfa1704b294dc19ac168c9859e2d4872461f3e1a1ddc7aebbd8", kill_on_drop: false }`
[INFO] [stdout] eb5e807881022bfa1704b294dc19ac168c9859e2d4872461f3e1a1ddc7aebbd8