[INFO] cloning repository https://github.com/CathalMullan/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/CathalMullan/advent-of-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCathalMullan%2Fadvent-of-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCathalMullan%2Fadvent-of-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed9454316b6c96408042121460f5e80944f8698e
[INFO] checking CathalMullan/advent-of-code against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCathalMullan%2Fadvent-of-code" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/CathalMullan/advent-of-code on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/CathalMullan/advent-of-code
[INFO] finished tweaking git repo https://github.com/CathalMullan/advent-of-code
[INFO] tweaked toml for git repo https://github.com/CathalMullan/advent-of-code written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/CathalMullan/advent-of-code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 861f0bef5d53fd7a8a1ac97bfb65c29c7f9cce6969a3f75928993f2e23515f38
[INFO] running `Command { std: "docker" "start" "-a" "861f0bef5d53fd7a8a1ac97bfb65c29c7f9cce6969a3f75928993f2e23515f38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "861f0bef5d53fd7a8a1ac97bfb65c29c7f9cce6969a3f75928993f2e23515f38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "861f0bef5d53fd7a8a1ac97bfb65c29c7f9cce6969a3f75928993f2e23515f38", kill_on_drop: false }`
[INFO] [stdout] 861f0bef5d53fd7a8a1ac97bfb65c29c7f9cce6969a3f75928993f2e23515f38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 620d48a8378faf5b233f0392c6a17627d10b4c7b13115dc609784499cfa99dec
[INFO] running `Command { std: "docker" "start" "-a" "620d48a8378faf5b233f0392c6a17627d10b4c7b13115dc609784499cfa99dec", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling proc-macro2 v1.0.42
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling semver v1.0.12
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking futures-io v0.3.21
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking ndarray v0.15.4
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling rstest_macros v0.14.0
[INFO] [stderr]     Checking aoc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: `let` expressions in this position are unstable
[INFO] [stdout]   --> src/bin/2015_08.rs:44:32
[INFO] [stdout]    |
[INFO] [stdout] 44 |             if char == '\\' && let Some(next) = chars.next() && next == 'x' {
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
[INFO] [stdout]    = help: add `#![feature(let_chains)]` to the crate attributes to enable
[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 E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc` (bin "2015_08") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "620d48a8378faf5b233f0392c6a17627d10b4c7b13115dc609784499cfa99dec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "620d48a8378faf5b233f0392c6a17627d10b4c7b13115dc609784499cfa99dec", kill_on_drop: false }`
[INFO] [stdout] 620d48a8378faf5b233f0392c6a17627d10b4c7b13115dc609784499cfa99dec
