[INFO] cloning repository https://github.com/vi/mal-rust-vi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vi/mal-rust-vi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Fmal-rust-vi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Fmal-rust-vi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 086546da3a47ce9ab8155f919be32e940b925db3
[INFO] documenting vi/mal-rust-vi against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvi%2Fmal-rust-vi" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vi/mal-rust-vi on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/vi/mal-rust-vi
[INFO] finished tweaking git repo https://github.com/vi/mal-rust-vi
[INFO] tweaked toml for git repo https://github.com/vi/mal-rust-vi written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/vi/mal-rust-vi already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d74da813241751176f38e0ea58926d30f0f165c7c00a8362f3856fac01a96846
[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" "d74da813241751176f38e0ea58926d30f0f165c7c00a8362f3856fac01a96846", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d74da813241751176f38e0ea58926d30f0f165c7c00a8362f3856fac01a96846", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d74da813241751176f38e0ea58926d30f0f165c7c00a8362f3856fac01a96846", kill_on_drop: false }`
[INFO] [stdout] d74da813241751176f38e0ea58926d30f0f165c7c00a8362f3856fac01a96846
[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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f710e4e26c4ba62d91deb95a98fe44c8ff4648c61eca9efd40bdb3d11d72cf5d
[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" "f710e4e26c4ba62d91deb95a98fe44c8ff4648c61eca9efd40bdb3d11d72cf5d", kill_on_drop: false }`
[INFO] [stderr]     Checking unescape v0.1.0
[INFO] [stderr]  Documenting malvi_step0 v0.1.0 (/opt/rustwide/workdir/step0)
[INFO] [stderr]    Compiling pest v2.0.1
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]     Checking slab_typesafe v0.1.2
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling im-rc v12.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> step0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_blocks)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 document `malvi_step0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name malvi_step0 step0/src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f710e4e26c4ba62d91deb95a98fe44c8ff4648c61eca9efd40bdb3d11d72cf5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f710e4e26c4ba62d91deb95a98fe44c8ff4648c61eca9efd40bdb3d11d72cf5d", kill_on_drop: false }`
[INFO] [stdout] f710e4e26c4ba62d91deb95a98fe44c8ff4648c61eca9efd40bdb3d11d72cf5d
