[INFO] cloning repository https://github.com/toftt/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/toftt/aoc-2020" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoftt%2Faoc-2020", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoftt%2Faoc-2020'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08d8872c05eb7cd0e83f47fa39e7ed15b67f904a
[INFO] testing toftt/aoc-2020 against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoftt%2Faoc-2020" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/toftt/aoc-2020 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/toftt/aoc-2020
[INFO] finished tweaking git repo https://github.com/toftt/aoc-2020
[INFO] tweaked toml for git repo https://github.com/toftt/aoc-2020 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/toftt/aoc-2020 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1c158d4a64213b69e81e43d5a7a005434b12ffa5429f4318db9814eeb63ac5ce
[INFO] running `Command { std: "docker" "start" "-a" "1c158d4a64213b69e81e43d5a7a005434b12ffa5429f4318db9814eeb63ac5ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1c158d4a64213b69e81e43d5a7a005434b12ffa5429f4318db9814eeb63ac5ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c158d4a64213b69e81e43d5a7a005434b12ffa5429f4318db9814eeb63ac5ce", kill_on_drop: false }`
[INFO] [stdout] 1c158d4a64213b69e81e43d5a7a005434b12ffa5429f4318db9814eeb63ac5ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2587fd0c5e93334fc9860b01e0a589f6e4b8fae37acb9b27e3a55ededca9f98
[INFO] running `Command { std: "docker" "start" "-a" "b2587fd0c5e93334fc9860b01e0a589f6e4b8fae37acb9b27e3a55ededca9f98", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling ahash v0.2.19
[INFO] [stderr]    Compiling quick-error v2.0.0
[INFO] [stderr]    Compiling dot v0.1.4
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]    Compiling rand_isaac v0.2.0
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling graphlib v0.6.2
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling handlebars v3.5.1
[INFO] [stderr]    Compiling aoc_2020 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable 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 stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(destructuring_assignment)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(iter_advance_by)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Map` in the current scope
[INFO] [stdout]   --> src/solutions/day06.rs:30:22
[INFO] [stdout]    |
[INFO] [stdout] 30 |                     .fold_first(|acc: HashSet<char>, set| acc.union(&set).cloned().collect())
[INFO] [stdout]    |                      ^^^^^^^^^^ method not found in `Map<std::slice::Iter<'_, std::string::String>, [closure@src/solutions/day06.rs:29:26: 29:63]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Map` in the current scope
[INFO] [stdout]   --> src/solutions/day06.rs:44:22
[INFO] [stdout]    |
[INFO] [stdout] 44 |                     .fold_first(|acc: HashSet<char>, set| acc.intersection(&set).cloned().collect())
[INFO] [stdout]    |                      ^^^^^^^^^^ method not found in `Map<std::slice::Iter<'_, std::string::String>, [closure@src/solutions/day06.rs:43:26: 43:63]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b2587fd0c5e93334fc9860b01e0a589f6e4b8fae37acb9b27e3a55ededca9f98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2587fd0c5e93334fc9860b01e0a589f6e4b8fae37acb9b27e3a55ededca9f98", kill_on_drop: false }`
[INFO] [stdout] b2587fd0c5e93334fc9860b01e0a589f6e4b8fae37acb9b27e3a55ededca9f98
