[INFO] cloning repository https://github.com/0x7CFE/cortex
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0x7CFE/cortex" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0x7CFE%2Fcortex", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0x7CFE%2Fcortex'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f901670b230530e692eec001e99f5be798989519
[INFO] documenting 0x7CFE/cortex 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%2F0x7CFE%2Fcortex" "/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/0x7CFE/cortex 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/0x7CFE/cortex
[INFO] finished tweaking git repo https://github.com/0x7CFE/cortex
[INFO] tweaked toml for git repo https://github.com/0x7CFE/cortex written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/0x7CFE/cortex 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 vec_map v0.7.0
[INFO] [stderr]   Downloaded num-complex v0.1.37
[INFO] [stderr]   Downloaded rayon v0.7.0
[INFO] [stderr]   Downloaded hound v3.1.0
[INFO] [stderr]   Downloaded deque v0.3.1
[INFO] [stderr]   Downloaded unicode-segmentation v1.1.0
[INFO] [stderr]   Downloaded num_cpus v1.3.0
[INFO] [stderr]   Downloaded rayon-core v1.0.0
[INFO] [stderr]   Downloaded dft v0.5.4
[INFO] [stderr]   Downloaded sample v0.6.2
[INFO] [stderr]   Downloaded byteorder v1.0.0
[INFO] [stderr]   Downloaded bit-vec v0.4.3
[INFO] [stderr]   Downloaded clap v2.23.2
[INFO] [stderr]   Downloaded serde v0.9.14
[INFO] [stderr]   Downloaded serde_derive v0.9.14
[INFO] [stderr]   Downloaded bincode v1.0.0-alpha7
[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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f2acd6155654aba49b7e8c87c2a6a0285e077a030c4ca3b7f602299930d452d
[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" "3f2acd6155654aba49b7e8c87c2a6a0285e077a030c4ca3b7f602299930d452d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f2acd6155654aba49b7e8c87c2a6a0285e077a030c4ca3b7f602299930d452d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f2acd6155654aba49b7e8c87c2a6a0285e077a030c4ca3b7f602299930d452d", kill_on_drop: false }`
[INFO] [stdout] 3f2acd6155654aba49b7e8c87c2a6a0285e077a030c4ca3b7f602299930d452d
[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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c43f8dbd9ed352763fc0cabc720cd1b8f1b5a4fbadb8766aac8b2714be8ea0f5
[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" "c43f8dbd9ed352763fc0cabc720cd1b8f1b5a4fbadb8766aac8b2714be8ea0f5", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking num-traits v0.1.37
[INFO] [stderr]    Compiling rayon-core v1.0.0
[INFO] [stderr]     Checking rustc-serialize v0.3.23
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking unicode-segmentation v1.1.0
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking serde v0.9.14
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking either v1.1.0
[INFO] [stderr]     Checking vec_map v0.7.0
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking bitflags v0.8.2
[INFO] [stderr]     Checking sample v0.6.2
[INFO] [stderr]     Checking bit-vec v0.4.3
[INFO] [stderr]     Checking hound v3.1.0
[INFO] [stderr]    Compiling syn v0.11.10
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking num_cpus v1.3.0
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking clap v2.23.2
[INFO] [stderr]     Checking deque v0.3.1
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.2
[INFO] [stderr]     Checking rayon v0.7.0
[INFO] [stderr]    Compiling serde_derive v0.9.14
[INFO] [stderr]     Checking num-complex v0.1.37
[INFO] [stderr]     Checking dft v0.5.4
[INFO] [stderr]     Checking bincode v1.0.0-alpha7
[INFO] [stderr]  Documenting cortex 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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(btree_range, collections_bound)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `cortex`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name cortex 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 bincode=/opt/rustwide/target/debug/deps/libbincode-87f38978e9096e09.rmeta --extern bit_vec=/opt/rustwide/target/debug/deps/libbit_vec-4d9445ab27dfd3a0.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-ded8e369580a058b.rmeta --extern dft=/opt/rustwide/target/debug/deps/libdft-17c9f3b106e138ef.rmeta --extern hound=/opt/rustwide/target/debug/deps/libhound-f097e4fac360f293.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-b627d0b1400d25d9.rmeta --extern num_complex=/opt/rustwide/target/debug/deps/libnum_complex-f6ab3a25160b77c1.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-d12dcf5024b71879.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-4cf04d11c88a90c0.rmeta --extern sample=/opt/rustwide/target/debug/deps/libsample-e6e296685db66728.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-783cf05dedfe8fbc.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-eb83f7f03e4128ac.so --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "c43f8dbd9ed352763fc0cabc720cd1b8f1b5a4fbadb8766aac8b2714be8ea0f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c43f8dbd9ed352763fc0cabc720cd1b8f1b5a4fbadb8766aac8b2714be8ea0f5", kill_on_drop: false }`
[INFO] [stdout] c43f8dbd9ed352763fc0cabc720cd1b8f1b5a4fbadb8766aac8b2714be8ea0f5