[INFO] fetching crate arloader 0.1.62...
[INFO] testing arloader-0.1.62 against 1.60.0 for beta-1.61-1
[INFO] extracting crate arloader 0.1.62 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate arloader 0.1.62 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 crates.io crate arloader 0.1.62
[INFO] finished tweaking crates.io crate arloader 0.1.62
[INFO] tweaked toml for crates.io crate arloader 0.1.62 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate crates.io crate arloader 0.1.62 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]  Downloading crates ...
[INFO] [stderr]   Downloaded ed25519-dalek-bip32 v0.2.0
[INFO] [stderr]   Downloaded jsonwebkey v0.3.4
[INFO] [stderr]   Downloaded derivation-path v0.2.0
[INFO] [stderr]   Downloaded solana-logger v1.10.0
[INFO] [stderr]   Downloaded libflate v1.2.0
[INFO] [stderr]   Downloaded pbkdf2 v0.10.1
[INFO] [stderr]   Downloaded uriparse v0.6.4
[INFO] [stderr]   Downloaded solana-sdk v1.10.0
[INFO] [stderr]   Downloaded infer v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c5acd3b54eaba1234b0026d4f3ceeb1ac55389df58fab487309ccc0622749d6
[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" "2c5acd3b54eaba1234b0026d4f3ceeb1ac55389df58fab487309ccc0622749d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c5acd3b54eaba1234b0026d4f3ceeb1ac55389df58fab487309ccc0622749d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c5acd3b54eaba1234b0026d4f3ceeb1ac55389df58fab487309ccc0622749d6", kill_on_drop: false }`
[INFO] [stdout] 2c5acd3b54eaba1234b0026d4f3ceeb1ac55389df58fab487309ccc0622749d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0570c5656ad2c2cb55a71e26e344d0ddd297cce22d9e0d12d618acf7931a7d4
[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" "e0570c5656ad2c2cb55a71e26e344d0ddd297cce22d9e0d12d618acf7931a7d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.90
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[INFO] [stderr]    Compiling ed25519 v1.4.1
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[INFO] [stderr]    Compiling solana-frozen-abi-macro v1.10.0
[INFO] [stderr]    Compiling solana-frozen-abi v1.10.0
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[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling idna v0.2.3
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[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling libsecp256k1-gen-ecmult v0.2.1
[INFO] [stderr]    Compiling libsecp256k1-gen-genmult v0.2.1
[INFO] [stderr]    Compiling solana-logger v1.10.0
[INFO] [stderr]    Compiling libsecp256k1 v0.6.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.79
[INFO] [stderr]    Compiling borsh-derive-internal v0.9.3
[INFO] [stderr]    Compiling borsh-schema-derive-internal v0.9.3
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.79
[INFO] [stderr]    Compiling serde_derive v1.0.136
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[INFO] [stderr]    Compiling tokio-macros v1.7.0
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[INFO] [stderr]    Compiling zeroize v1.5.4
[INFO] [stderr]    Compiling tokio v1.17.0
[INFO] [stderr]    Compiling zerocopy v0.3.0
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling futures-executor v0.3.21
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling tokio-util v0.6.9
[INFO] [stderr]    Compiling tokio-native-tls v0.3.0
[INFO] [stderr]    Compiling h2 v0.3.12
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling serde_bytes v0.11.5
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling block-buffer v0.10.2
[INFO] [stderr]    Compiling crypto-common v0.1.3
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling sha2 v0.9.9
[INFO] [stderr]    Compiling curve25519-dalek v3.2.0
[INFO] [stderr]    Compiling hmac v0.8.1
[INFO] [stderr]    Compiling avro-rs v0.13.0
[INFO] [stderr]    Compiling digest v0.10.3
[INFO] [stderr]    Compiling hmac-drbg v0.3.0
[INFO] [stderr]    Compiling sha2 v0.10.2
[INFO] [stderr]    Compiling sha3 v0.10.1
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling pbkdf2 v0.10.1
[INFO] [stderr]    Compiling yasna v0.4.0
[INFO] [stderr]    Compiling ed25519-dalek v1.0.1
[INFO] [stderr]    Compiling jsonwebkey v0.3.4
[INFO] [stderr]    Compiling ed25519-dalek-bip32 v0.2.0
[INFO] [stderr]    Compiling hyper v0.14.18
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling reqwest v0.11.10
[INFO] [stderr]    Compiling arloader v0.1.62 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:73:1
[INFO] [stdout]    |
[INFO] [stdout] 73 | #![feature(derive_default_enum)]
[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 `arloader` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e0570c5656ad2c2cb55a71e26e344d0ddd297cce22d9e0d12d618acf7931a7d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0570c5656ad2c2cb55a71e26e344d0ddd297cce22d9e0d12d618acf7931a7d4", kill_on_drop: false }`
[INFO] [stdout] e0570c5656ad2c2cb55a71e26e344d0ddd297cce22d9e0d12d618acf7931a7d4