[INFO] cloning repository https://github.com/ul/org-tangle-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ul/org-tangle-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ful%2Forg-tangle-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ful%2Forg-tangle-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed64ad7211dcf9fe70f099b48bfa81acc73781a5
[INFO] documenting ul/org-tangle-rs 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%2Ful%2Forg-tangle-rs" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ul/org-tangle-rs 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/ul/org-tangle-rs
[INFO] finished tweaking git repo https://github.com/ul/org-tangle-rs
[INFO] tweaked toml for git repo https://github.com/ul/org-tangle-rs written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ul/org-tangle-rs 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]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v2.28.0
[INFO] [stderr]   Downloaded pest v1.0.0-beta.16
[INFO] [stderr]   Downloaded pest_derive v1.0.0-beta.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] dc99fe323baadd49378a2f84af8645138b45752b96b28c3f708776b206a775e5
[INFO] running `Command { std: "docker" "start" "-a" "dc99fe323baadd49378a2f84af8645138b45752b96b28c3f708776b206a775e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc99fe323baadd49378a2f84af8645138b45752b96b28c3f708776b206a775e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc99fe323baadd49378a2f84af8645138b45752b96b28c3f708776b206a775e5", kill_on_drop: false }`
[INFO] [stdout] dc99fe323baadd49378a2f84af8645138b45752b96b28c3f708776b206a775e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 1ff33ce197f574b35a272cd7e93d2d484d42a5fd43cb236893f9147b689933b5
[INFO] running `Command { std: "docker" "start" "-a" "1ff33ce197f574b35a272cd7e93d2d484d42a5fd43cb236893f9147b689933b5", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking libc v0.2.34
[INFO] [stderr]    Compiling pest v1.0.0-beta.16
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking atty v0.2.3
[INFO] [stderr]     Checking clap v2.28.0
[INFO] [stderr]    Compiling pest_derive v1.0.0-beta.16
[INFO] [stderr]  Documenting org-tangle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(entry_and_modify)]
[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 document `org-tangle`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name org_tangle src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=79fae1a9f73a35a3 -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-9a9e7cf5643a762c.rmeta --extern pest=/opt/rustwide/target/debug/deps/libpest-b3a241fc1e51ef0a.rmeta --extern pest_derive=/opt/rustwide/target/debug/deps/libpest_derive-4462c62e0e4ebcaf.so --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1ff33ce197f574b35a272cd7e93d2d484d42a5fd43cb236893f9147b689933b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ff33ce197f574b35a272cd7e93d2d484d42a5fd43cb236893f9147b689933b5", kill_on_drop: false }`
[INFO] [stdout] 1ff33ce197f574b35a272cd7e93d2d484d42a5fd43cb236893f9147b689933b5