[INFO] fetching crate arraymap 0.1.1...
[INFO] checking arraymap-0.1.1 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate arraymap 0.1.1 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate arraymap 0.1.1 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate arraymap 0.1.1
[INFO] finished tweaking crates.io crate arraymap 0.1.1
[INFO] tweaked toml for crates.io crate arraymap 0.1.1 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f1cdd816ea15c5870da2c76c3d8945f037a47c74971c1f4f7b2d81674ef33e9
[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" "8f1cdd816ea15c5870da2c76c3d8945f037a47c74971c1f4f7b2d81674ef33e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f1cdd816ea15c5870da2c76c3d8945f037a47c74971c1f4f7b2d81674ef33e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f1cdd816ea15c5870da2c76c3d8945f037a47c74971c1f4f7b2d81674ef33e9", kill_on_drop: false }`
[INFO] [stdout] 8f1cdd816ea15c5870da2c76c3d8945f037a47c74971c1f4f7b2d81674ef33e9
[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=forbid" "-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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 5a9b818ea5b5adc7537900e0fa9b7ab0591bbfce7ac7edcbdcd5a3c582599946
[INFO] running `Command { std: "docker" "start" "-a" "5a9b818ea5b5adc7537900e0fa9b7ab0591bbfce7ac7edcbdcd5a3c582599946", kill_on_drop: false }`
[INFO] [stderr]     Checking arraymap v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable library feature 'array_map'
[INFO] [stdout]   --> src/lib.rs:53:25
[INFO] [stdout]    |
[INFO] [stdout] 53 |         assert_eq!(x, x.map(|_| unreachable!()));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #75243 <https://github.com/rust-lang/rust/issues/75243> for more information
[INFO] [stdout]    = help: add `#![feature(array_map)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ArrayMap`
[INFO] [stdout]   --> src/lib.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     use ArrayMap;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arraymap`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "5a9b818ea5b5adc7537900e0fa9b7ab0591bbfce7ac7edcbdcd5a3c582599946", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a9b818ea5b5adc7537900e0fa9b7ab0591bbfce7ac7edcbdcd5a3c582599946", kill_on_drop: false }`
[INFO] [stdout] 5a9b818ea5b5adc7537900e0fa9b7ab0591bbfce7ac7edcbdcd5a3c582599946