[INFO] cloning repository https://github.com/Geal/generator_nom
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Geal/generator_nom" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeal%2Fgenerator_nom", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeal%2Fgenerator_nom'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7ac3c969ea2ec78bb5b735c2611959b2baaef0e
[INFO] documenting Geal/generator_nom against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGeal%2Fgenerator_nom" "/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/Geal/generator_nom on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Geal/generator_nom
[INFO] finished tweaking git repo https://github.com/Geal/generator_nom
[INFO] tweaked toml for git repo https://github.com/Geal/generator_nom written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Geal/generator_nom already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/sozu-proxy/circular`
[INFO] [stderr]     Updating git repository `https://github.com/rust-av/flavors`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nom v3.2.0
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d25118a3d3212cf24d15cd2bcc7651904d29e1afb6a0e7abc9628e5bbf28fa7
[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" "5d25118a3d3212cf24d15cd2bcc7651904d29e1afb6a0e7abc9628e5bbf28fa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d25118a3d3212cf24d15cd2bcc7651904d29e1afb6a0e7abc9628e5bbf28fa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d25118a3d3212cf24d15cd2bcc7651904d29e1afb6a0e7abc9628e5bbf28fa7", kill_on_drop: false }`
[INFO] [stdout] 5d25118a3d3212cf24d15cd2bcc7651904d29e1afb6a0e7abc9628e5bbf28fa7
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ccf2acb83812dc4fbe3f9db7066fcddf993a015371c9b41a9fb7f840dd1c8d45
[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" "ccf2acb83812dc4fbe3f9db7066fcddf993a015371c9b41a9fb7f840dd1c8d45", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]     Checking circular v0.2.0 (https://github.com/sozu-proxy/circular#3f4a7b6c)
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking nom v3.2.0
[INFO] [stderr]     Checking flavors v0.2.0 (https://github.com/rust-av/flavors#a210b120)
[INFO] [stderr]  Documenting generator_nom v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(generators, generator_trait)]
[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 `generator_nom`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name generator_nom src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern circular=/opt/rustwide/target/debug/deps/libcircular-32d9923213142dcb.rmeta --extern flavors=/opt/rustwide/target/debug/deps/libflavors-bb3432181e7681df.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-3062fd4c0fa221d6.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "ccf2acb83812dc4fbe3f9db7066fcddf993a015371c9b41a9fb7f840dd1c8d45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccf2acb83812dc4fbe3f9db7066fcddf993a015371c9b41a9fb7f840dd1c8d45", kill_on_drop: false }`
[INFO] [stdout] ccf2acb83812dc4fbe3f9db7066fcddf993a015371c9b41a9fb7f840dd1c8d45
