[INFO] cloning repository https://github.com/frublox/mobi-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frublox/mobi-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrublox%2Fmobi-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrublox%2Fmobi-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4c59cdb0b614d4e9ce5650710ce3fe2290751bf8
[INFO] documenting frublox/mobi-rust 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%2Ffrublox%2Fmobi-rust" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/frublox/mobi-rust 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/frublox/mobi-rust
[INFO] finished tweaking git repo https://github.com/frublox/mobi-rust
[INFO] tweaked toml for git repo https://github.com/frublox/mobi-rust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/frublox/mobi-rust 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 debug_print v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 646cc5529be5fbebe6f4e4fcbe2db6f0795b92af2835c75bb66889807deeb90b
[INFO] running `Command { std: "docker" "start" "-a" "646cc5529be5fbebe6f4e4fcbe2db6f0795b92af2835c75bb66889807deeb90b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "646cc5529be5fbebe6f4e4fcbe2db6f0795b92af2835c75bb66889807deeb90b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "646cc5529be5fbebe6f4e4fcbe2db6f0795b92af2835c75bb66889807deeb90b", kill_on_drop: false }`
[INFO] [stdout] 646cc5529be5fbebe6f4e4fcbe2db6f0795b92af2835c75bb66889807deeb90b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 47d2ae61bf7ba0d6a00784f20a3fdb8e80ded966d573baf2b6bd5b0814777a15
[INFO] running `Command { std: "docker" "start" "-a" "47d2ae61bf7ba0d6a00784f20a3fdb8e80ded966d573baf2b6bd5b0814777a15", kill_on_drop: false }`
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking debug_print v1.0.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]  Documenting mobi 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(thread_spawn_unchecked)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]    --> src/mobi.rs:129:18
[INFO] [stdout]     |
[INFO] [stdout] 129 | /// wiki page at https://wiki.mobileread.com/wiki/MOBI.
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://wiki.mobileread.com/wiki/MOBI.>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout]     = note: bare URLs are not automatically turned into clickable links
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `mobi`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name mobi src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ae25c2d82ad77a3c -L dependency=/opt/rustwide/target/debug/deps --extern bit_vec=/opt/rustwide/target/debug/deps/libbit_vec-1fb26c74ecd114a1.rmeta --extern debug_print=/opt/rustwide/target/debug/deps/libdebug_print-e15c7b8aba1a64a9.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-d54e68bcf3a1a4c6.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "47d2ae61bf7ba0d6a00784f20a3fdb8e80ded966d573baf2b6bd5b0814777a15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47d2ae61bf7ba0d6a00784f20a3fdb8e80ded966d573baf2b6bd5b0814777a15", kill_on_drop: false }`
[INFO] [stdout] 47d2ae61bf7ba0d6a00784f20a3fdb8e80ded966d573baf2b6bd5b0814777a15