[INFO] cloning repository https://github.com/ischaaf/aoc-solution
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ischaaf/aoc-solution" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fischaaf%2Faoc-solution", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fischaaf%2Faoc-solution'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 316b75f13bf8e980073cccb2c11987f2b1b06f1e
[INFO] checking ischaaf/aoc-solution against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fischaaf%2Faoc-solution" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ischaaf/aoc-solution 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/ischaaf/aoc-solution
[INFO] finished tweaking git repo https://github.com/ischaaf/aoc-solution
[INFO] tweaked toml for git repo https://github.com/ischaaf/aoc-solution written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/ischaaf/aoc-solution 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.19
[INFO] [stderr]   Downloaded html2md v0.2.10
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.19
[INFO] [stderr]   Downloaded aocf v0.1.8
[INFO] [stderr]   Downloaded reqwest v0.10.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 478da25dc36cb98c118e545fdbe69b0951e8523ae8e789886e27cc4de24f7a40
[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" "478da25dc36cb98c118e545fdbe69b0951e8523ae8e789886e27cc4de24f7a40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "478da25dc36cb98c118e545fdbe69b0951e8523ae8e789886e27cc4de24f7a40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "478da25dc36cb98c118e545fdbe69b0951e8523ae8e789886e27cc4de24f7a40", kill_on_drop: false }`
[INFO] [stdout] 478da25dc36cb98c118e545fdbe69b0951e8523ae8e789886e27cc4de24f7a40
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 2fd400e3c400f09b765b835fc8351b0132e04dc7d86e8cfc200dd5117c51a234
[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" "2fd400e3c400f09b765b835fc8351b0132e04dc7d86e8cfc200dd5117c51a234", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.53
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling native-tls v0.2.6
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling libsqlite3-sys v0.18.0
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking net2 v0.2.36
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking socket2 v0.3.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking phf_shared v0.8.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking backtrace v0.3.55
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking tokio v0.2.23
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling pin-project-internal v1.0.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling diesel_derives v1.4.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking pin-project v1.0.2
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking diesel v1.4.5
[INFO] [stderr]     Checking xml5ever v0.16.1
[INFO] [stderr]     Checking markup5ever_rcdom v0.1.0
[INFO] [stderr]     Checking html2md v0.2.10
[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 aocf v0.1.8
[INFO] [stderr]     Checking aoc-solution 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iterator_fold_self)]
[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/day/day_06.rs:29:22
[INFO] [stdout]    |
[INFO] [stdout] 29 |                     .fold_first(|acc, n| acc.intersection(&n).cloned().collect::<HashSet<char>>())
[INFO] [stdout]    |                      ^^^^^^^^^^ method not found in `Map<std::str::Lines<'_>, [closure@src/day/day_06.rs:28:26: 28:66]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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-solution` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0599]: no method named `fold_first` found for struct `Map` in the current scope
[INFO] [stdout]   --> src/day/day_06.rs:29:22
[INFO] [stdout]    |
[INFO] [stdout] 29 |                     .fold_first(|acc, n| acc.intersection(&n).cloned().collect::<HashSet<char>>())
[INFO] [stdout]    |                      ^^^^^^^^^^ method not found in `Map<std::str::Lines<'_>, [closure@src/day/day_06.rs:28:26: 28:66]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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: build failed
[INFO] running `Command { std: "docker" "inspect" "2fd400e3c400f09b765b835fc8351b0132e04dc7d86e8cfc200dd5117c51a234", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fd400e3c400f09b765b835fc8351b0132e04dc7d86e8cfc200dd5117c51a234", kill_on_drop: false }`
[INFO] [stdout] 2fd400e3c400f09b765b835fc8351b0132e04dc7d86e8cfc200dd5117c51a234
