[INFO] cloning repository https://github.com/dunkelstern/bookrss
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dunkelstern/bookrss" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdunkelstern%2Fbookrss", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdunkelstern%2Fbookrss'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 97b86f47d56ff9e5f6fdffe537876b2015916bbd
[INFO] documenting dunkelstern/bookrss against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdunkelstern%2Fbookrss" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dunkelstern/bookrss on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dunkelstern/bookrss
[INFO] finished tweaking git repo https://github.com/dunkelstern/bookrss
[INFO] tweaked toml for git repo https://github.com/dunkelstern/bookrss written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/dunkelstern/bookrss already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded diesel_derives v1.1.0
[INFO] [stderr]   Downloaded shellexpand v1.0.0
[INFO] [stderr]   Downloaded tera v0.10.10
[INFO] [stderr]   Downloaded diesel v1.1.1
[INFO] [stderr]   Downloaded config v0.8.0
[INFO] [stderr]   Downloaded num-traits v0.2.0
[INFO] [stderr]   Downloaded derive_builder_core v0.2.0
[INFO] [stderr]   Downloaded derive_builder v0.5.1
[INFO] [stderr]   Downloaded crossbeam-epoch v0.3.0
[INFO] [stderr]   Downloaded rusqlite v0.13.0
[INFO] [stderr]   Downloaded serde-hjson v0.8.1
[INFO] [stderr]   Downloaded r2d2_sqlite v0.5.0
[INFO] [stderr]   Downloaded rss v1.3.0
[INFO] [stderr]   Downloaded quick-xml v0.10.1
[INFO] [stderr]   Downloaded libsqlite3-sys v0.9.1
[INFO] [stderr]   Downloaded clap v2.30.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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-2020-08-29" "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] 14854f05e7754d2bdab0fe138a0bf536e99906fd3eb9aaaa0dc0a247c99f5d60
[INFO] running `Command { std: "docker" "start" "-a" "14854f05e7754d2bdab0fe138a0bf536e99906fd3eb9aaaa0dc0a247c99f5d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14854f05e7754d2bdab0fe138a0bf536e99906fd3eb9aaaa0dc0a247c99f5d60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14854f05e7754d2bdab0fe138a0bf536e99906fd3eb9aaaa0dc0a247c99f5d60", kill_on_drop: false }`
[INFO] [stdout] 14854f05e7754d2bdab0fe138a0bf536e99906fd3eb9aaaa0dc0a247c99f5d60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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-2020-08-29" "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] e933c33b1eece3d4a33359f850476ec437caefb535891481d0d424b97393f4fd
[INFO] running `Command { std: "docker" "start" "-a" "e933c33b1eece3d4a33359f850476ec437caefb535891481d0d424b97393f4fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]     Checking num-traits v0.2.0
[INFO] [stderr]    Compiling yansi v0.3.4
[INFO] [stderr]    Compiling cc v1.0.4
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling untrusted v0.5.1
[INFO] [stderr]     Checking unidecode v0.2.0
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]    Compiling serde v1.0.27
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/yansi-0.3.4/src/lib.rs:1:32
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature="nightly", feature(const_atomic_bool_new))]
[INFO] [stdout]   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling httparse v1.2.4
[INFO] [stderr]     Checking pear v0.0.12
[INFO] [stderr]    Compiling ordermap v0.2.13
[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 compile `yansi`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e933c33b1eece3d4a33359f850476ec437caefb535891481d0d424b97393f4fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e933c33b1eece3d4a33359f850476ec437caefb535891481d0d424b97393f4fd", kill_on_drop: false }`
[INFO] [stdout] e933c33b1eece3d4a33359f850476ec437caefb535891481d0d424b97393f4fd