[INFO] fetching crate rtsam 0.1.2...
[INFO] documenting rtsam-0.1.2 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate rtsam 0.1.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rtsam 0.1.2 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 crates.io crate rtsam 0.1.2
[INFO] finished tweaking crates.io crate rtsam 0.1.2
[INFO] tweaked toml for crates.io crate rtsam 0.1.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 4f6733305835c6d83a2a1d90445e5031d43be0df85cd44d62ea0e7232b0a227d
[INFO] running `Command { std: "docker" "start" "-a" "4f6733305835c6d83a2a1d90445e5031d43be0df85cd44d62ea0e7232b0a227d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f6733305835c6d83a2a1d90445e5031d43be0df85cd44d62ea0e7232b0a227d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f6733305835c6d83a2a1d90445e5031d43be0df85cd44d62ea0e7232b0a227d", kill_on_drop: false }`
[INFO] [stdout] 4f6733305835c6d83a2a1d90445e5031d43be0df85cd44d62ea0e7232b0a227d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] c5ed624f8aa0b8895e7e6835f296f169b9fd519f0937c625521a4e22dda62e37
[INFO] running `Command { std: "docker" "start" "-a" "c5ed624f8aa0b8895e7e6835f296f169b9fd519f0937c625521a4e22dda62e37", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking alga v0.8.2
[INFO] [stderr]     Checking num-rational v0.2.4
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking nalgebra v0.17.3
[INFO] [stderr]  Documenting rtsam v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(alloc)]
[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] [stderr] error: Could not document `rtsam`.
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name rtsam src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern alga=/opt/rustwide/target/debug/deps/libalga-a44de9c91e315afc.rmeta --extern approx=/opt/rustwide/target/debug/deps/libapprox-e3593897222b367c.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-48bf9a7e0e78d393.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-5bd218f3382143a1.rmeta --extern typenum=/opt/rustwide/target/debug/deps/libtypenum-4a7cf65fa49a8e89.rmeta --cap-lints=warn --crate-version 0.1.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "c5ed624f8aa0b8895e7e6835f296f169b9fd519f0937c625521a4e22dda62e37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5ed624f8aa0b8895e7e6835f296f169b9fd519f0937c625521a4e22dda62e37", kill_on_drop: false }`
[INFO] [stdout] c5ed624f8aa0b8895e7e6835f296f169b9fd519f0937c625521a4e22dda62e37