[INFO] fetching crate capstan 0.0.2...
[INFO] documenting capstan-0.0.2 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate capstan 0.0.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate capstan 0.0.2 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 crates.io crate capstan 0.0.2
[INFO] finished tweaking crates.io crate capstan 0.0.2
[INFO] tweaked toml for crates.io crate capstan 0.0.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate capstan 0.0.2 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]  Downloading crates ...
[INFO] [stderr]   Downloaded rusty-fork v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 923ded60fb756f8c6e9d89bb989de84f6400cd2bf406a1c91d9c28e0596684d7
[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" "923ded60fb756f8c6e9d89bb989de84f6400cd2bf406a1c91d9c28e0596684d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "923ded60fb756f8c6e9d89bb989de84f6400cd2bf406a1c91d9c28e0596684d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "923ded60fb756f8c6e9d89bb989de84f6400cd2bf406a1c91d9c28e0596684d7", kill_on_drop: false }`
[INFO] [stdout] 923ded60fb756f8c6e9d89bb989de84f6400cd2bf406a1c91d9c28e0596684d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 8db3d3b3673920cb4a91184792043302b0dae990063c175acb4bda8f55818bfb
[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" "8db3d3b3673920cb4a91184792043302b0dae990063c175acb4bda8f55818bfb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.78
[INFO] [stderr]    Compiling syn v1.0.42
[INFO] [stderr]     Checking svg v0.8.0
[INFO] [stderr]     Checking num-complex v0.2.4
[INFO] [stderr]     Checking simba v0.2.1
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking nalgebra v0.22.0
[INFO] [stderr]  Documenting capstan v0.0.2 (/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(is_sorted)]
[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 `capstan`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name capstan 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-8cdc3112b411762b.rmeta --extern approx=/opt/rustwide/target/debug/deps/libapprox-943c1e86cd44432f.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-c750d04568c562b6.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-d5cff3d1fae7b7bf.rmeta --extern svg=/opt/rustwide/target/debug/deps/libsvg-391a8406c375b945.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-7e10d4922ec00ee1.rmeta --cap-lints=warn --crate-version 0.0.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "8db3d3b3673920cb4a91184792043302b0dae990063c175acb4bda8f55818bfb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8db3d3b3673920cb4a91184792043302b0dae990063c175acb4bda8f55818bfb", kill_on_drop: false }`
[INFO] [stdout] 8db3d3b3673920cb4a91184792043302b0dae990063c175acb4bda8f55818bfb
