[INFO] cloning repository https://github.com/fre-hu/mdarray
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fre-hu/mdarray" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffre-hu%2Fmdarray", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffre-hu%2Fmdarray'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c33faa6ec03fdba6039d434cc317d6b1e0bb096f
[INFO] documenting fre-hu/mdarray against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffre-hu%2Fmdarray" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fre-hu/mdarray on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fre-hu/mdarray
[INFO] finished tweaking git repo https://github.com/fre-hu/mdarray
[INFO] tweaked toml for git repo https://github.com/fre-hu/mdarray written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/fre-hu/mdarray already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1.61.0" "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] 821e4080295c43ed597f98bb3e15ba32bd564a97258992223bce7255e1e4c9d9
[INFO] running `Command { std: "docker" "start" "-a" "821e4080295c43ed597f98bb3e15ba32bd564a97258992223bce7255e1e4c9d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "821e4080295c43ed597f98bb3e15ba32bd564a97258992223bce7255e1e4c9d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "821e4080295c43ed597f98bb3e15ba32bd564a97258992223bce7255e1e4c9d9", kill_on_drop: false }`
[INFO] [stdout] 821e4080295c43ed597f98bb3e15ba32bd564a97258992223bce7255e1e4c9d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1.61.0" "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] 71c2cafee40bbfa9ce1472577485f8b3c9bfe223d2850c49b1aaa0367623a20e
[INFO] running `Command { std: "docker" "start" "-a" "71c2cafee40bbfa9ce1472577485f8b3c9bfe223d2850c49b1aaa0367623a20e", kill_on_drop: false }`
[INFO] [stderr]  Documenting mdarray v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:147:1
[INFO] [stdout]     |
[INFO] [stdout] 147 | #![feature(allocator_api)]
[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:148:1
[INFO] [stdout]     |
[INFO] [stdout] 148 | #![feature(generic_associated_types)]
[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:149:1
[INFO] [stdout]     |
[INFO] [stdout] 149 | #![feature(int_roundings)]
[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:150:1
[INFO] [stdout]     |
[INFO] [stdout] 150 | #![feature(marker_trait_attr)]
[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:151:1
[INFO] [stdout]     |
[INFO] [stdout] 151 | #![feature(ptr_metadata)]
[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:152:1
[INFO] [stdout]     |
[INFO] [stdout] 152 | #![feature(slice_range)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 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 document `mdarray`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name mdarray src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d7ae1a6f0161e2a4 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "71c2cafee40bbfa9ce1472577485f8b3c9bfe223d2850c49b1aaa0367623a20e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71c2cafee40bbfa9ce1472577485f8b3c9bfe223d2850c49b1aaa0367623a20e", kill_on_drop: false }`
[INFO] [stdout] 71c2cafee40bbfa9ce1472577485f8b3c9bfe223d2850c49b1aaa0367623a20e