[INFO] fetching crate spongedown 0.4.1...
[INFO] documenting spongedown-0.4.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate spongedown 0.4.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate spongedown 0.4.1 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 spongedown 0.4.1
[INFO] finished tweaking crates.io crate spongedown 0.4.1
[INFO] tweaked toml for crates.io crate spongedown 0.4.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate spongedown 0.4.1 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 file v1.1.2
[INFO] [stderr]   Downloaded xml-rs v0.8.2
[INFO] [stderr]   Downloaded sauron_vdom v0.24.0
[INFO] [stderr]   Downloaded sauron v0.24.0
[INFO] [stderr]   Downloaded ncollide2d v0.19.2
[INFO] [stderr]   Downloaded svgbob v0.5.0-alpha.4
[INFO] [stderr]   Downloaded url_path v0.1.3
[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] [stdout] eb431fe03efccf6c43ca9cfa3e95077cf7dcc10a48ec9266f76d594a49084979
[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" "eb431fe03efccf6c43ca9cfa3e95077cf7dcc10a48ec9266f76d594a49084979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb431fe03efccf6c43ca9cfa3e95077cf7dcc10a48ec9266f76d594a49084979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb431fe03efccf6c43ca9cfa3e95077cf7dcc10a48ec9266f76d594a49084979", kill_on_drop: false }`
[INFO] [stdout] eb431fe03efccf6c43ca9cfa3e95077cf7dcc10a48ec9266f76d594a49084979
[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] [stdout] 0e853ff165d6cfd6eb983acbaa57980789a4b1d3927cdc213d7fbe12ff78358d
[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" "0e853ff165d6cfd6eb983acbaa57980789a4b1d3927cdc213d7fbe12ff78358d", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking ordermap v0.3.5
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]     Checking xml-rs v0.8.2
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]     Checking downcast-rs v1.1.1
[INFO] [stderr]     Checking typed-arena v1.7.0
[INFO] [stderr]     Checking pom v3.1.0
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]     Checking file v1.1.2
[INFO] [stderr]     Checking url_path v0.1.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking twoway v0.2.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking sauron_vdom v0.24.0
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking bit-set v0.5.1
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking plist v0.5.5
[INFO] [stderr]     Checking nalgebra v0.18.1
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]     Checking fancy-regex v0.3.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.15
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking thiserror v1.0.15
[INFO] [stderr]     Checking sauron v0.24.0
[INFO] [stderr]     Checking comrak v0.7.0
[INFO] [stderr]     Checking syntect v4.1.1
[INFO] [stderr]     Checking ncollide2d v0.19.2
[INFO] [stderr]     Checking svgbob v0.5.0-alpha.4
[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/svgbob-0.5.0-alpha.4/src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(is_sorted)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/svgbob-0.5.0-alpha.4/src/lib.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[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 compile `svgbob`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "0e853ff165d6cfd6eb983acbaa57980789a4b1d3927cdc213d7fbe12ff78358d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e853ff165d6cfd6eb983acbaa57980789a4b1d3927cdc213d7fbe12ff78358d", kill_on_drop: false }`
[INFO] [stdout] 0e853ff165d6cfd6eb983acbaa57980789a4b1d3927cdc213d7fbe12ff78358d