[INFO] cloning repository https://github.com/hfcredidio/aoc_2020
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hfcredidio/aoc_2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhfcredidio%2Faoc_2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhfcredidio%2Faoc_2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6d383047782ceea59e53e308037e610f7737b7ca
[INFO] testing hfcredidio/aoc_2020 against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhfcredidio%2Faoc_2020" "/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/hfcredidio/aoc_2020 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hfcredidio/aoc_2020
[INFO] finished tweaking git repo https://github.com/hfcredidio/aoc_2020
[INFO] tweaked toml for git repo https://github.com/hfcredidio/aoc_2020 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/hfcredidio/aoc_2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "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] d3ee5b122ee5e58578e8fea3d4660275b34a355e645b83fcc60238e8a569745e
[INFO] running `Command { std: "docker" "start" "-a" "d3ee5b122ee5e58578e8fea3d4660275b34a355e645b83fcc60238e8a569745e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3ee5b122ee5e58578e8fea3d4660275b34a355e645b83fcc60238e8a569745e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3ee5b122ee5e58578e8fea3d4660275b34a355e645b83fcc60238e8a569745e", kill_on_drop: false }`
[INFO] [stdout] d3ee5b122ee5e58578e8fea3d4660275b34a355e645b83fcc60238e8a569745e
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b86e9b5085aa250c5060809c982488a1f7ba67ed7d3e94fc2861541bca37a3f2
[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" "b86e9b5085aa250c5060809c982488a1f7ba67ed7d3e94fc2861541bca37a3f2", kill_on_drop: false }`
[INFO] [stderr]    Compiling aoc_2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iterator_fold_self)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(peekable_next_if)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Filter` in the current scope
[INFO] [stdout]   --> src/day16.rs:98:10
[INFO] [stdout]    |
[INFO] [stdout] 98 |         .fold_first(|acc, fields| {
[INFO] [stdout]    |          ^^^^^^^^^^ method not found in `Filter<Map<std::slice::Iter<'_, Vec<u64>>, [closure@src/day16.rs:91:14: 96:10]>, [closure@src/day16.rs:97:17: 97:76]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Map` in the current scope
[INFO] [stdout]   --> src/day6.rs:13:10
[INFO] [stdout]    |
[INFO] [stdout] 13 |         .fold_first(|acc, x| acc.intersection(&x).copied().collect())
[INFO] [stdout]    |          ^^^^^^^^^^ method not found in `Map<std::str::Lines<'_>, for<'r> fn(&'r str) -> HashSet<char> {unique_chars}>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc_2020` due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "b86e9b5085aa250c5060809c982488a1f7ba67ed7d3e94fc2861541bca37a3f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b86e9b5085aa250c5060809c982488a1f7ba67ed7d3e94fc2861541bca37a3f2", kill_on_drop: false }`
[INFO] [stdout] b86e9b5085aa250c5060809c982488a1f7ba67ed7d3e94fc2861541bca37a3f2
