[INFO] cloning repository https://github.com/postcss-rs/postcss-icss-utils
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/postcss-rs/postcss-icss-utils" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpostcss-rs%2Fpostcss-icss-utils", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpostcss-rs%2Fpostcss-icss-utils'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ba856b5461585a59f46b14815763159b84d6f397
[INFO] documenting postcss-rs/postcss-icss-utils against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpostcss-rs%2Fpostcss-icss-utils" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/postcss-rs/postcss-icss-utils on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/postcss-rs/postcss-icss-utils
[INFO] finished tweaking git repo https://github.com/postcss-rs/postcss-icss-utils
[INFO] tweaked toml for git repo https://github.com/postcss-rs/postcss-icss-utils written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/postcss-rs/postcss-icss-utils already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "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] e6e958feb33bce366ada8e33a7eb01b6f63bbe985c395fce5b96402c5a05833c
[INFO] running `Command { std: "docker" "start" "-a" "e6e958feb33bce366ada8e33a7eb01b6f63bbe985c395fce5b96402c5a05833c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6e958feb33bce366ada8e33a7eb01b6f63bbe985c395fce5b96402c5a05833c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6e958feb33bce366ada8e33a7eb01b6f63bbe985c395fce5b96402c5a05833c", kill_on_drop: false }`
[INFO] [stdout] e6e958feb33bce366ada8e33a7eb01b6f63bbe985c395fce5b96402c5a05833c
[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" "RUSTDOCFLAGS=--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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] cd05e122f3d4ce0b15d725cefc291403ef36d0283c2e30931131991eda3a8fb0
[INFO] running `Command { std: "docker" "start" "-a" "cd05e122f3d4ce0b15d725cefc291403ef36d0283c2e30931131991eda3a8fb0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling mimalloc-rust-sys v1.7.2
[INFO] [stderr]     Checking ropey v1.3.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking tokenizer v0.0.2 (https://github.com/postcss-rs/postcss-rs#ce4cca57)
[INFO] [stderr]     Checking mimalloc-rust v0.1.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/mimalloc-rust-0.1.1/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[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 `mimalloc-rust` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "cd05e122f3d4ce0b15d725cefc291403ef36d0283c2e30931131991eda3a8fb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cd05e122f3d4ce0b15d725cefc291403ef36d0283c2e30931131991eda3a8fb0", kill_on_drop: false }`
[INFO] [stdout] cd05e122f3d4ce0b15d725cefc291403ef36d0283c2e30931131991eda3a8fb0