[INFO] cloning repository https://github.com/nwoeanhinnogaehr/flow-synth
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nwoeanhinnogaehr/flow-synth" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnwoeanhinnogaehr%2Fflow-synth", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnwoeanhinnogaehr%2Fflow-synth'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2dc911b383ab53eeae1ebfae59c031aa360a349f
[INFO] documenting nwoeanhinnogaehr/flow-synth against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnwoeanhinnogaehr%2Fflow-synth" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nwoeanhinnogaehr/flow-synth on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nwoeanhinnogaehr/flow-synth
[INFO] finished tweaking git repo https://github.com/nwoeanhinnogaehr/flow-synth
[INFO] tweaked toml for git repo https://github.com/nwoeanhinnogaehr/flow-synth written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/nwoeanhinnogaehr/flow-synth already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4e1a948415db3b8a226b820abc8f9bcaad46290aeed018b743ed5f96a6b71bc1
[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" "4e1a948415db3b8a226b820abc8f9bcaad46290aeed018b743ed5f96a6b71bc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4e1a948415db3b8a226b820abc8f9bcaad46290aeed018b743ed5f96a6b71bc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e1a948415db3b8a226b820abc8f9bcaad46290aeed018b743ed5f96a6b71bc1", kill_on_drop: false }`
[INFO] [stdout] 4e1a948415db3b8a226b820abc8f9bcaad46290aeed018b743ed5f96a6b71bc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 936406895cf79390ff7f73906f0717599a9047398af565f5887934e3b570d3cb
[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" "936406895cf79390ff7f73906f0717599a9047398af565f5887934e3b570d3cb", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling libloading v0.5.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.30
[INFO] [stderr]    Compiling nfd v0.0.4
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]     Checking libloading v0.4.3
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking stb_truetype v0.2.6
[INFO] [stderr]     Checking x11-dl v2.18.3
[INFO] [stderr]    Compiling wayland-scanner v0.21.13
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]     Checking futures-core-preview v0.2.3
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling derivative v1.0.2
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking twox-hash v1.4.1
[INFO] [stderr]     Checking crossbeam v0.7.1
[INFO] [stderr]     Checking notify v4.0.12
[INFO] [stderr]     Checking jack-sys v0.2.0
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]     Checking futures-channel-preview v0.2.2
[INFO] [stderr]     Checking futures-io-preview v0.2.2
[INFO] [stderr]     Checking rusttype v0.7.7
[INFO] [stderr]     Checking jack v0.6.0
[INFO] [stderr]     Checking futures-sink-preview v0.2.2
[INFO] [stderr]     Checking dlib v0.4.1
[INFO] [stderr]     Checking num-bigint v0.2.2
[INFO] [stderr]     Checking wayland-sys v0.21.13
[INFO] [stderr]     Checking futures-util-preview v0.2.2
[INFO] [stderr]     Checking backtrace v0.3.32
[INFO] [stderr]     Checking ndarray v0.12.1
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking glyph_brush_layout v0.1.6
[INFO] [stderr]     Checking glyph_brush v0.5.3
[INFO] [stderr]    Compiling wayland-client v0.21.13
[INFO] [stderr]    Compiling wayland-protocols v0.21.13
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.3
[INFO] [stderr]    Compiling gfx_gl v0.6.0
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.5
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking futures-executor-preview v0.2.2
[INFO] [stderr]     Checking futures-stable-preview v0.2.3
[INFO] [stderr]     Checking futures-async-runtime-preview v0.2.3
[INFO] [stderr]     Checking futures-preview v0.2.2
[INFO] [stderr]     Checking wayland-commons v0.21.13
[INFO] [stderr]     Checking gfx_core v0.9.1
[INFO] [stderr]     Checking ron v0.5.1
[INFO] [stderr]     Checking gfx v0.18.1
[INFO] [stderr]     Checking gfx_device_gl v0.16.1
[INFO] [stderr]     Checking gfx_glyph v0.15.0
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]     Checking winit v0.19.1
[INFO] [stderr]     Checking glutin v0.21.0
[INFO] [stderr]     Checking gfx_window_glutin v0.31.0
[INFO] [stderr]  Documenting flow-synth 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(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(plugin)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_fn)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(generators)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(generator_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(libc)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(drain_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(nll)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(arbitrary_self_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(never_type)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(async_await)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(atomic_min_max)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 13 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 `flow-synth`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name flow_synth 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 cassowary=/opt/rustwide/target/debug/deps/libcassowary-45151972c7a98fdb.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-ceab43ef5710dc52.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-40c45720c34a3f0b.rmeta --extern gfx=/opt/rustwide/target/debug/deps/libgfx-a897deaf499f2e9b.rmeta --extern gfx_device_gl=/opt/rustwide/target/debug/deps/libgfx_device_gl-0ed88680cc26bf16.rmeta --extern gfx_glyph=/opt/rustwide/target/debug/deps/libgfx_glyph-103f588077e616b0.rmeta --extern gfx_window_glutin=/opt/rustwide/target/debug/deps/libgfx_window_glutin-455788ab933d24bd.rmeta --extern glutin=/opt/rustwide/target/debug/deps/libglutin-87886e265eaa166e.rmeta --extern jack=/opt/rustwide/target/debug/deps/libjack-827f15568d991f97.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-cb9b6bbc8b26f66e.rmeta --extern nfd=/opt/rustwide/target/debug/deps/libnfd-1ed3c39a09e2968d.rmeta --extern notify=/opt/rustwide/target/debug/deps/libnotify-631616622115c6fc.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-d9797cf2736f3d5a.rmeta --extern ron=/opt/rustwide/target/debug/deps/libron-ce519170a47b3520.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-4c9a55af21664bfb.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-f4805cf8ee5a5fe7.so --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "936406895cf79390ff7f73906f0717599a9047398af565f5887934e3b570d3cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "936406895cf79390ff7f73906f0717599a9047398af565f5887934e3b570d3cb", kill_on_drop: false }`
[INFO] [stdout] 936406895cf79390ff7f73906f0717599a9047398af565f5887934e3b570d3cb
