[INFO] fetching crate components-arena 2.1.5...
[INFO] testing components-arena-2.1.5 against 1.60.0 for beta-1.61-1
[INFO] extracting crate components-arena 2.1.5 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate components-arena 2.1.5 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 components-arena 2.1.5
[INFO] finished tweaking crates.io crate components-arena 2.1.5
[INFO] tweaked toml for crates.io crate components-arena 2.1.5 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate crates.io crate components-arena 2.1.5 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 enum-ordinalize v3.1.10
[INFO] [stderr]   Downloaded macro-attr-2018 v1.1.1
[INFO] [stderr]   Downloaded generics v0.3.2
[INFO] [stderr]   Downloaded phantom-type v0.3.1
[INFO] [stderr]   Downloaded educe v0.4.18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ff7299fad7b58edf7ec56f51c0946c1164c604d143421e6f42846f15ce36903f
[INFO] running `Command { std: "docker" "start" "-a" "ff7299fad7b58edf7ec56f51c0946c1164c604d143421e6f42846f15ce36903f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff7299fad7b58edf7ec56f51c0946c1164c604d143421e6f42846f15ce36903f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff7299fad7b58edf7ec56f51c0946c1164c604d143421e6f42846f15ce36903f", kill_on_drop: false }`
[INFO] [stdout] ff7299fad7b58edf7ec56f51c0946c1164c604d143421e6f42846f15ce36903f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] e1ab754f87f8b0b7234df4f15c32308db88c1eefd1bdd45f9e1c6b207dd98449
[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" "e1ab754f87f8b0b7234df4f15c32308db88c1eefd1bdd45f9e1c6b207dd98449", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling generics v0.3.2
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling enum-ordinalize v3.1.10
[INFO] [stderr]    Compiling educe v0.4.18
[INFO] [stderr]    Compiling phantom-type v0.3.1
[INFO] [stderr]    Compiling components-arena v2.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:32
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![cfg_attr(feature="nightly", feature(const_fn_trait_bound))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:32
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![cfg_attr(feature="nightly", feature(try_reserve))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `components-arena` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "e1ab754f87f8b0b7234df4f15c32308db88c1eefd1bdd45f9e1c6b207dd98449", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1ab754f87f8b0b7234df4f15c32308db88c1eefd1bdd45f9e1c6b207dd98449", kill_on_drop: false }`
[INFO] [stdout] e1ab754f87f8b0b7234df4f15c32308db88c1eefd1bdd45f9e1c6b207dd98449