[INFO] cloning repository https://github.com/angauber/gomoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/angauber/gomoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fangauber%2Fgomoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fangauber%2Fgomoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66289db98ffefad4bc4b6127edfee57ecd247fd8
[INFO] testing angauber/gomoku against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fangauber%2Fgomoku" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/angauber/gomoku on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/angauber/gomoku
[INFO] finished tweaking git repo https://github.com/angauber/gomoku
[INFO] tweaked toml for git repo https://github.com/angauber/gomoku written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/angauber/gomoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 346e62b76b82bfab4ec852d6c353bacde4e8f1dec18cbe8785e4329b4b1306f6
[INFO] running `Command { std: "docker" "start" "-a" "346e62b76b82bfab4ec852d6c353bacde4e8f1dec18cbe8785e4329b4b1306f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "346e62b76b82bfab4ec852d6c353bacde4e8f1dec18cbe8785e4329b4b1306f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "346e62b76b82bfab4ec852d6c353bacde4e8f1dec18cbe8785e4329b4b1306f6", kill_on_drop: false }`
[INFO] [stdout] 346e62b76b82bfab4ec852d6c353bacde4e8f1dec18cbe8785e4329b4b1306f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df79f1028c205b43c7704d572b3ac7f66f10971fddf35c7364c0c35fca6dd5eb
[INFO] running `Command { std: "docker" "start" "-a" "df79f1028c205b43c7704d572b3ac7f66f10971fddf35c7364c0c35fca6dd5eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling funty v1.2.0
[INFO] [stderr]    Compiling strum v0.22.0
[INFO] [stderr]    Compiling wyz v0.4.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling bitvec v0.22.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling strum_macros v0.22.0
[INFO] [stderr]    Compiling gomoku 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(binary_heap_into_iter_sorted)]
[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 `gomoku` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "df79f1028c205b43c7704d572b3ac7f66f10971fddf35c7364c0c35fca6dd5eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df79f1028c205b43c7704d572b3ac7f66f10971fddf35c7364c0c35fca6dd5eb", kill_on_drop: false }`
[INFO] [stdout] df79f1028c205b43c7704d572b3ac7f66f10971fddf35c7364c0c35fca6dd5eb