[INFO] cloning repository https://github.com/davisschenk/project-euler-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davisschenk/project-euler-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavisschenk%2Fproject-euler-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavisschenk%2Fproject-euler-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e025517516455d8674d9c576434a288adc201987
[INFO] testing davisschenk/project-euler-rust against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavisschenk%2Fproject-euler-rust" "/workspace/builds/worker-24/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-24/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/davisschenk/project-euler-rust 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 git repo https://github.com/davisschenk/project-euler-rust
[INFO] finished tweaking git repo https://github.com/davisschenk/project-euler-rust
[INFO] tweaked toml for git repo https://github.com/davisschenk/project-euler-rust written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate git repo https://github.com/davisschenk/project-euler-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] 6fd067c74792258bcd98375173bfa1199dc26c6b6f27754b5c05417edfc939bf
[INFO] running `Command { std: "docker" "start" "-a" "6fd067c74792258bcd98375173bfa1199dc26c6b6f27754b5c05417edfc939bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6fd067c74792258bcd98375173bfa1199dc26c6b6f27754b5c05417edfc939bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fd067c74792258bcd98375173bfa1199dc26c6b6f27754b5c05417edfc939bf", kill_on_drop: false }`
[INFO] [stdout] 6fd067c74792258bcd98375173bfa1199dc26c6b6f27754b5c05417edfc939bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] 1884db7a748478dfc372f857ea12a1bb48e50b5f73d79c876a6ea83acef234b4
[INFO] running `Command { std: "docker" "start" "-a" "1884db7a748478dfc372f857ea12a1bb48e50b5f73d79c876a6ea83acef234b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling prime v0.1.0 (/opt/rustwide/workdir/pkg/prime)
[INFO] [stdout] warning: constant is never used: `THOUSAND_PRIMES`
[INFO] [stdout]   --> pkg/prime/src/lib.rs:3:1
[INFO] [stdout]    |
[INFO] [stdout] 3  | / const THOUSAND_PRIMES: [u64;168] = [
[INFO] [stdout] 4  | |     2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97,
[INFO] [stdout] 5  | |     101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193,
[INFO] [stdout] 6  | |     197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307,
[INFO] [stdout] ...  |
[INFO] [stdout] 12 | |     937, 941, 947, 953, 967, 971, 977, 983, 991, 997,
[INFO] [stdout] 13 | | ];
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling solver v0.1.0 (/opt/rustwide/workdir/pkg/solver)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> pkg/solver/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_span)]
[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 `solver` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "1884db7a748478dfc372f857ea12a1bb48e50b5f73d79c876a6ea83acef234b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1884db7a748478dfc372f857ea12a1bb48e50b5f73d79c876a6ea83acef234b4", kill_on_drop: false }`
[INFO] [stdout] 1884db7a748478dfc372f857ea12a1bb48e50b5f73d79c876a6ea83acef234b4