[INFO] fetching crate scanlan_sudoku 0.1.0...
[INFO] testing scanlan_sudoku-0.1.0 against 1.69.0 for beta-1.70-1
[INFO] extracting crate scanlan_sudoku 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate scanlan_sudoku 0.1.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scanlan_sudoku 0.1.0
[INFO] finished tweaking crates.io crate scanlan_sudoku 0.1.0
[INFO] tweaked toml for crates.io crate scanlan_sudoku 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate scanlan_sudoku 0.1.0 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" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a148e977d34161c0f7896190f5684f0fcf252295bb1dd0d118ec6580e2946350
[INFO] running `Command { std: "docker" "start" "-a" "a148e977d34161c0f7896190f5684f0fcf252295bb1dd0d118ec6580e2946350", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a148e977d34161c0f7896190f5684f0fcf252295bb1dd0d118ec6580e2946350", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a148e977d34161c0f7896190f5684f0fcf252295bb1dd0d118ec6580e2946350", kill_on_drop: false }`
[INFO] [stdout] a148e977d34161c0f7896190f5684f0fcf252295bb1dd0d118ec6580e2946350
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b70055fefe566ea9a7e09d78a0fd410be7fbc6056b29e842dd280c8beb697d1c
[INFO] running `Command { std: "docker" "start" "-a" "b70055fefe566ea9a7e09d78a0fd410be7fbc6056b29e842dd280c8beb697d1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling regex-syntax v0.7.1
[INFO] [stderr]    Compiling aho-corasick v1.0.1
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling regex v1.8.1
[INFO] [stderr]    Compiling scanlan_sudoku v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_flatten)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scanlan_sudoku` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b70055fefe566ea9a7e09d78a0fd410be7fbc6056b29e842dd280c8beb697d1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b70055fefe566ea9a7e09d78a0fd410be7fbc6056b29e842dd280c8beb697d1c", kill_on_drop: false }`
[INFO] [stdout] b70055fefe566ea9a7e09d78a0fd410be7fbc6056b29e842dd280c8beb697d1c
