[INFO] fetching crate aces 0.0.13...
[INFO] testing aces-0.0.13 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate aces 0.0.13 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate aces 0.0.13 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate aces 0.0.13
[INFO] finished tweaking crates.io crate aces 0.0.13
[INFO] tweaked toml for crates.io crate aces 0.0.13 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2eeddad571f0cf5f8aa96dd92d7a33826f3f5138e4a447269adceb5d61a2440f
[INFO] running `Command { std: "docker" "start" "-a" "2eeddad571f0cf5f8aa96dd92d7a33826f3f5138e4a447269adceb5d61a2440f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2eeddad571f0cf5f8aa96dd92d7a33826f3f5138e4a447269adceb5d61a2440f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eeddad571f0cf5f8aa96dd92d7a33826f3f5138e4a447269adceb5d61a2440f", kill_on_drop: false }`
[INFO] [stdout] 2eeddad571f0cf5f8aa96dd92d7a33826f3f5138e4a447269adceb5d61a2440f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 033b4a6af6af0fe6730f728f35161548013052aa0f60054e008199b76daf0ee2
[INFO] running `Command { std: "docker" "start" "-a" "033b4a6af6af0fe6730f728f35161548013052aa0f60054e008199b76daf0ee2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling varisat-formula v0.2.2
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling vec_mut_scan v0.3.0
[INFO] [stderr]    Compiling leb128 v0.2.5
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling varisat v0.2.2
[INFO] [stderr]    Compiling colored v1.9.3
[INFO] [stderr]    Compiling varisat-internal-proof v0.2.2
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling fern v0.6.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling ordered-float v2.10.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling partial_ref_derive v0.3.3
[INFO] [stderr]    Compiling varisat-internal-macros v0.2.2
[INFO] [stderr]    Compiling partial_ref v0.3.3
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling varisat-dimacs v0.2.2
[INFO] [stderr]    Compiling varisat-checker v0.2.2
[INFO] [stderr]    Compiling string_cache v0.8.4
[INFO] [stderr]    Compiling aces v0.0.13 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(bool_to_option)]
[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 `aces` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "033b4a6af6af0fe6730f728f35161548013052aa0f60054e008199b76daf0ee2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "033b4a6af6af0fe6730f728f35161548013052aa0f60054e008199b76daf0ee2", kill_on_drop: false }`
[INFO] [stdout] 033b4a6af6af0fe6730f728f35161548013052aa0f60054e008199b76daf0ee2