[INFO] fetching crate arclight 0.0.1...
[INFO] testing arclight-0.0.1 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate arclight 0.0.1 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate arclight 0.0.1 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 arclight 0.0.1
[INFO] finished tweaking crates.io crate arclight 0.0.1
[INFO] tweaked toml for crates.io crate arclight 0.0.1 written to /workspace/builds/worker-5/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] 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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 423fad34f2999003f51aa955742e846ba8bc7bfc6ca92efc8d66e2d3b1dc3247
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "423fad34f2999003f51aa955742e846ba8bc7bfc6ca92efc8d66e2d3b1dc3247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "423fad34f2999003f51aa955742e846ba8bc7bfc6ca92efc8d66e2d3b1dc3247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "423fad34f2999003f51aa955742e846ba8bc7bfc6ca92efc8d66e2d3b1dc3247", kill_on_drop: false }`
[INFO] [stdout] 423fad34f2999003f51aa955742e846ba8bc7bfc6ca92efc8d66e2d3b1dc3247
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d90113c7b551fb0766bb1f20be7f4e2cd010f25bb44b7375e491ab25f39870c1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d90113c7b551fb0766bb1f20be7f4e2cd010f25bb44b7375e491ab25f39870c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling arclight v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generators)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenType` is imported redundantly
[INFO] [stdout]   --> src/Parser.rs:44:13
[INFO] [stdout]    |
[INFO] [stdout] 21 | / enum TokenType {
[INFO] [stdout] 22 | |     New,
[INFO] [stdout] 23 | |     Tab,
[INFO] [stdout] 24 | |     Pass,
[INFO] [stdout] ...  |
[INFO] [stdout] 27 | |     Photon,
[INFO] [stdout] 28 | | }
[INFO] [stdout]    | |_- the item `TokenType` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 44 |           use Parser::TokenType;
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/ArclightSyntaxTree.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arclight` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d90113c7b551fb0766bb1f20be7f4e2cd010f25bb44b7375e491ab25f39870c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d90113c7b551fb0766bb1f20be7f4e2cd010f25bb44b7375e491ab25f39870c1", kill_on_drop: false }`
[INFO] [stdout] d90113c7b551fb0766bb1f20be7f4e2cd010f25bb44b7375e491ab25f39870c1