[INFO] cloning repository https://github.com/aatifsyed/advent-of-code-2021
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aatifsyed/advent-of-code-2021" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faatifsyed%2Fadvent-of-code-2021", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faatifsyed%2Fadvent-of-code-2021'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8ad2b3954b44e557e485b2ccc4c8efba74fe9d00
[INFO] testing aatifsyed/advent-of-code-2021 against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faatifsyed%2Fadvent-of-code-2021" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/aatifsyed/advent-of-code-2021 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-5/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/aatifsyed/advent-of-code-2021
[INFO] finished tweaking git repo https://github.com/aatifsyed/advent-of-code-2021
[INFO] tweaked toml for git repo https://github.com/aatifsyed/advent-of-code-2021 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/aatifsyed/advent-of-code-2021 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded geographiclib-rs v0.2.0
[INFO] [stderr]   Downloaded rstar v0.8.4
[INFO] [stderr]   Downloaded geo v0.18.0
[INFO] [stderr]   Downloaded recap v0.1.1
[INFO] [stderr]   Downloaded grid v0.6.0
[INFO] [stderr]   Downloaded benchtest v0.1.1
[INFO] [stderr]   Downloaded recap-derive v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] 278f8420eb98456cd000e0a0eda2985ac7507430fcad0b464deb383142473a5a
[INFO] running `Command { std: "docker" "start" "-a" "278f8420eb98456cd000e0a0eda2985ac7507430fcad0b464deb383142473a5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "278f8420eb98456cd000e0a0eda2985ac7507430fcad0b464deb383142473a5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "278f8420eb98456cd000e0a0eda2985ac7507430fcad0b464deb383142473a5a", kill_on_drop: false }`
[INFO] [stdout] 278f8420eb98456cd000e0a0eda2985ac7507430fcad0b464deb383142473a5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "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] cce834fab574d6750dcdcb709cbdaabdbb9a194e3654724cb11248f81eebb747
[INFO] running `Command { std: "docker" "start" "-a" "cce834fab574d6750dcdcb709cbdaabdbb9a194e3654724cb11248f81eebb747", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling no-std-compat v0.4.1
[INFO] [stderr]    Compiling benchtest v0.1.1
[INFO] [stderr]    Compiling strum v0.23.0
[INFO] [stderr]    Compiling array2d v0.2.1
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling geographiclib-rs v0.2.0
[INFO] [stderr]    Compiling matrixmultiply v0.3.2
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling grid v0.6.0
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling ndarray v0.15.4
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling generic-array v0.13.3
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling as-slice v0.1.5
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling heapless v0.6.1
[INFO] [stderr]    Compiling recap-derive v0.1.1
[INFO] [stderr]    Compiling rstar v0.8.4
[INFO] [stderr]    Compiling geo-types v0.7.2
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling geo v0.18.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling envy v0.4.2
[INFO] [stderr]    Compiling recap v0.1.1
[INFO] [stderr]    Compiling advent-of-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / #![feature(
[INFO] [stdout] 3  | |     bool_to_option,
[INFO] [stdout] 4  | |     hash_drain_filter,
[INFO] [stdout] 5  | |     if_let_guard,
[INFO] [stdout] ...  |
[INFO] [stdout] 10 | |     try_blocks
[INFO] [stdout] 11 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `advent-of-code` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "cce834fab574d6750dcdcb709cbdaabdbb9a194e3654724cb11248f81eebb747", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cce834fab574d6750dcdcb709cbdaabdbb9a194e3654724cb11248f81eebb747", kill_on_drop: false }`
[INFO] [stdout] cce834fab574d6750dcdcb709cbdaabdbb9a194e3654724cb11248f81eebb747