[INFO] cloning repository https://github.com/nrxus/advent_of_code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nrxus/advent_of_code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrxus%2Fadvent_of_code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrxus%2Fadvent_of_code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b038001d31bc6171e29bf2ac963c8067bf692333
[INFO] checking nrxus/advent_of_code against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnrxus%2Fadvent_of_code" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nrxus/advent_of_code on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nrxus/advent_of_code
[INFO] finished tweaking git repo https://github.com/nrxus/advent_of_code
[INFO] tweaked toml for git repo https://github.com/nrxus/advent_of_code written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/nrxus/advent_of_code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ee428da1f080fc957d4ca70fabcb98277587eea7e6f863f09dfaee9a0dfe873
[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" "0ee428da1f080fc957d4ca70fabcb98277587eea7e6f863f09dfaee9a0dfe873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ee428da1f080fc957d4ca70fabcb98277587eea7e6f863f09dfaee9a0dfe873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ee428da1f080fc957d4ca70fabcb98277587eea7e6f863f09dfaee9a0dfe873", kill_on_drop: false }`
[INFO] [stdout] 0ee428da1f080fc957d4ca70fabcb98277587eea7e6f863f09dfaee9a0dfe873
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e587a43f3fe63ad635e6b2dd26a73231dae10876b6cdba74d26672e9667c4197
[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" "e587a43f3fe63ad635e6b2dd26a73231dae10876b6cdba74d26672e9667c4197", kill_on_drop: false }`
[INFO] [stderr]     Checking common v0.1.0 (/opt/rustwide/workdir/common)
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]     Checking futures-task v0.3.8
[INFO] [stderr]    Compiling encoding_rs v0.8.20
[INFO] [stderr]     Checking mime v0.3.14
[INFO] [stderr]     Checking intcode v0.1.0 (/opt/rustwide/workdir/intcode)
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]    Compiling time v0.2.23
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]    Compiling cookie v0.14.3
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking socket2 v0.3.17
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking bitvec v0.19.4
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]    Compiling openssl-sys v0.9.51
[INFO] [stderr]     Checking tokio v0.2.23
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking twenty-fifteen v0.1.0 (/opt/rustwide/workdir/2015)
[INFO] [stderr]     Checking twenty-sixteen v0.1.0 (/opt/rustwide/workdir/2016)
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking twenty-twenty v0.1.0 (/opt/rustwide/workdir/2020)
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking enum-map v0.6.4
[INFO] [stderr]     Checking twenty-nineteen v0.1.0 (/opt/rustwide/workdir/2019)
[INFO] [stderr]     Checking pin-project v1.0.2
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking reqwest v0.10.9
[INFO] [stderr]     Checking twenty-eighteen v0.1.0 (/opt/rustwide/workdir/2018)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> 2018/src/twenty_five.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[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 `twenty-eighteen` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e587a43f3fe63ad635e6b2dd26a73231dae10876b6cdba74d26672e9667c4197", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e587a43f3fe63ad635e6b2dd26a73231dae10876b6cdba74d26672e9667c4197", kill_on_drop: false }`
[INFO] [stdout] e587a43f3fe63ad635e6b2dd26a73231dae10876b6cdba74d26672e9667c4197
