[INFO] cloning repository https://github.com/balajisivaraman/adventofcode-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/balajisivaraman/adventofcode-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbalajisivaraman%2Fadventofcode-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbalajisivaraman%2Fadventofcode-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0dac45d6d30a1753e0edd74f5aa4f51c9d4d39d
[INFO] testing balajisivaraman/adventofcode-rust against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbalajisivaraman%2Fadventofcode-rust" "/workspace/builds/worker-23/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/balajisivaraman/adventofcode-rust on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/balajisivaraman/adventofcode-rust
[INFO] finished tweaking git repo https://github.com/balajisivaraman/adventofcode-rust
[INFO] tweaked toml for git repo https://github.com/balajisivaraman/adventofcode-rust written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate git repo https://github.com/balajisivaraman/adventofcode-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64fe65d64b0e5ecf64217117aff999d5ae103dd1459c7185407e31e1ca1c4044
[INFO] running `Command { std: "docker" "start" "-a" "64fe65d64b0e5ecf64217117aff999d5ae103dd1459c7185407e31e1ca1c4044", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64fe65d64b0e5ecf64217117aff999d5ae103dd1459c7185407e31e1ca1c4044", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64fe65d64b0e5ecf64217117aff999d5ae103dd1459c7185407e31e1ca1c4044", kill_on_drop: false }`
[INFO] [stdout] 64fe65d64b0e5ecf64217117aff999d5ae103dd1459c7185407e31e1ca1c4044
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1eb49915f17bc8f624b84dff01c7d33e5b3901eb74a228aaeada7928104011d1
[INFO] running `Command { std: "docker" "start" "-a" "1eb49915f17bc8f624b84dff01c7d33e5b3901eb74a228aaeada7928104011d1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling adventofcode-rust 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_advance_by)]
[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:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(concat_idents)]
[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:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(option_get_or_insert_default)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `adventofcode-rust` due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "1eb49915f17bc8f624b84dff01c7d33e5b3901eb74a228aaeada7928104011d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eb49915f17bc8f624b84dff01c7d33e5b3901eb74a228aaeada7928104011d1", kill_on_drop: false }`
[INFO] [stdout] 1eb49915f17bc8f624b84dff01c7d33e5b3901eb74a228aaeada7928104011d1