[INFO] cloning repository https://github.com/seansfkelley/terrain-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/seansfkelley/terrain-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseansfkelley%2Fterrain-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseansfkelley%2Fterrain-generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af734a187617c3b69b381788bf0b91fafd91d3fd
[INFO] documenting seansfkelley/terrain-generator against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseansfkelley%2Fterrain-generator" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/seansfkelley/terrain-generator on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/seansfkelley/terrain-generator
[INFO] finished tweaking git repo https://github.com/seansfkelley/terrain-generator
[INFO] tweaked toml for git repo https://github.com/seansfkelley/terrain-generator written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/seansfkelley/terrain-generator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50ec1dd32853fda4ea5cac811820230bcace08dcb61738af5fe6d064d2f569d3
[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" "50ec1dd32853fda4ea5cac811820230bcace08dcb61738af5fe6d064d2f569d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50ec1dd32853fda4ea5cac811820230bcace08dcb61738af5fe6d064d2f569d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50ec1dd32853fda4ea5cac811820230bcace08dcb61738af5fe6d064d2f569d3", kill_on_drop: false }`
[INFO] [stdout] 50ec1dd32853fda4ea5cac811820230bcace08dcb61738af5fe6d064d2f569d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f74007f994a3eafd088221b370c1fcbc79b8d4f39fd928cbc4344cbf558f99aa
[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" "f74007f994a3eafd088221b370c1fcbc79b8d4f39fd928cbc4344cbf558f99aa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking either v1.3.0
[INFO] [stderr]    Compiling log v0.3.8
[INFO] [stderr]     Checking scoped_threadpool v0.1.8
[INFO] [stderr]     Checking wavefront_obj v5.1.0
[INFO] [stderr]     Checking rand v0.3.17
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking num_cpus v1.7.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking inflate v0.3.3
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]    Compiling cmake v0.1.26
[INFO] [stderr]    Compiling xml-rs v0.6.2
[INFO] [stderr]    Compiling rayon-core v1.2.1
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking deflate v0.7.17
[INFO] [stderr]     Checking num-complex v0.1.40
[INFO] [stderr]     Checking multimap v0.4.0
[INFO] [stderr]     Checking semver v0.2.3
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking coco v0.1.1
[INFO] [stderr]    Compiling glfw-sys v3.2.2
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]    Compiling gl_generator v0.5.5
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking num-rational v0.1.39
[INFO] [stderr]     Checking env_logger v0.3.5
[INFO] [stderr]     Checking png v0.11.0
[INFO] [stderr]     Checking quickcheck v0.2.27
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]    Compiling gl v0.6.3
[INFO] [stderr]     Checking glm v0.2.3
[INFO] [stderr]     Checking jpeg-decoder v0.1.13
[INFO] [stderr]     Checking glfw v0.18.0 (https://github.com/bjz/glfw-rs.git#3bc2f8b2)
[INFO] [stderr]     Checking image v0.17.0
[INFO] [stderr]  Documenting terrain-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(libc)]
[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 `terrain-generator`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name terrain_generator 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 env_logger=/opt/rustwide/target/debug/deps/libenv_logger-bdabf22b7ed02685.rmeta --extern gl=/opt/rustwide/target/debug/deps/libgl-46e148e48e0afeb9.rmeta --extern glfw=/opt/rustwide/target/debug/deps/libglfw-85507c7094390233.rmeta --extern glm=/opt/rustwide/target/debug/deps/libglm-412a6e7458e46392.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-eb00aeabc42a8b12.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-a6e057a3d279a270.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-30a1e68538203258.rmeta --extern multimap=/opt/rustwide/target/debug/deps/libmultimap-09563764c9452664.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-c32e7d4d521f1c7f.rmeta --extern wavefront_obj=/opt/rustwide/target/debug/deps/libwavefront_obj-2217c2f2b3bbbd9c.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f74007f994a3eafd088221b370c1fcbc79b8d4f39fd928cbc4344cbf558f99aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f74007f994a3eafd088221b370c1fcbc79b8d4f39fd928cbc4344cbf558f99aa", kill_on_drop: false }`
[INFO] [stdout] f74007f994a3eafd088221b370c1fcbc79b8d4f39fd928cbc4344cbf558f99aa