[INFO] cloning repository https://github.com/aredden/renoir-mobile-cli
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/aredden/renoir-mobile-cli" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faredden%2Frenoir-mobile-cli", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faredden%2Frenoir-mobile-cli'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 37505033f3c3f44bedaa01bf7d70a703aac392db
[INFO] documenting aredden/renoir-mobile-cli 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%2Faredden%2Frenoir-mobile-cli" "/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/aredden/renoir-mobile-cli 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/aredden/renoir-mobile-cli
[INFO] finished tweaking git repo https://github.com/aredden/renoir-mobile-cli
[INFO] tweaked toml for git repo https://github.com/aredden/renoir-mobile-cli written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/aredden/renoir-mobile-cli 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 json v0.12.4
[INFO] [stderr]   Downloaded libloading v0.6.5
[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] 997edde0edeb6696ca3075f50f494529f4afe81b7f9e526eb132c8782f6a6aa6
[INFO] running `Command { std: "docker" "start" "-a" "997edde0edeb6696ca3075f50f494529f4afe81b7f9e526eb132c8782f6a6aa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "997edde0edeb6696ca3075f50f494529f4afe81b7f9e526eb132c8782f6a6aa6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "997edde0edeb6696ca3075f50f494529f4afe81b7f9e526eb132c8782f6a6aa6", kill_on_drop: false }`
[INFO] [stdout] 997edde0edeb6696ca3075f50f494529f4afe81b7f9e526eb132c8782f6a6aa6
[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] ae1ebc639750c1e92dcf2c1d88821d5dbdb9eaf9886267d349f7ef4f6f3b7d71
[INFO] running `Command { std: "docker" "start" "-a" "ae1ebc639750c1e92dcf2c1d88821d5dbdb9eaf9886267d349f7ef4f6f3b7d71", kill_on_drop: false }`
[INFO] [stderr]    Compiling renoir-mobile v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking libloading v0.6.5
[INFO] [stderr]  Documenting renoir-mobile 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(assoc_char_funcs)]
[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 `renoir-mobile`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name renoir_mobile src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ba42a9f22acc61c6 -L dependency=/opt/rustwide/target/debug/deps --extern json=/opt/rustwide/target/debug/deps/libjson-d3b01422cf953791.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-dac614a132f67804.rmeta --extern libloading=/opt/rustwide/target/debug/deps/liblibloading-d244b768f1c39061.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ae1ebc639750c1e92dcf2c1d88821d5dbdb9eaf9886267d349f7ef4f6f3b7d71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae1ebc639750c1e92dcf2c1d88821d5dbdb9eaf9886267d349f7ef4f6f3b7d71", kill_on_drop: false }`
[INFO] [stdout] ae1ebc639750c1e92dcf2c1d88821d5dbdb9eaf9886267d349f7ef4f6f3b7d71