[INFO] cloning repository https://github.com/twilco/kosmonaut
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/twilco/kosmonaut" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwilco%2Fkosmonaut", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwilco%2Fkosmonaut'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a1cbbdadf07e0af6143fe534457a9043aeaf502f
[INFO] documenting twilco/kosmonaut against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftwilco%2Fkosmonaut" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/twilco/kosmonaut on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-7/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/twilco/kosmonaut
[INFO] finished tweaking git repo https://github.com/twilco/kosmonaut
[INFO] tweaked toml for git repo https://github.com/twilco/kosmonaut written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/twilco/kosmonaut already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 816c75286471d85a8903eaf5369c99fbbd5802f44f3c4555d40f095aa29ab0cf
[INFO] running `Command { std: "docker" "start" "-a" "816c75286471d85a8903eaf5369c99fbbd5802f44f3c4555d40f095aa29ab0cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "816c75286471d85a8903eaf5369c99fbbd5802f44f3c4555d40f095aa29ab0cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "816c75286471d85a8903eaf5369c99fbbd5802f44f3c4555d40f095aa29ab0cf", kill_on_drop: false }`
[INFO] [stdout] 816c75286471d85a8903eaf5369c99fbbd5802f44f3c4555d40f095aa29ab0cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fdc1cec2bd4fc517334fdfd47856d1ec8707ee6d2637b2c9f377b8345385ab10
[INFO] running `Command { std: "docker" "start" "-a" "fdc1cec2bd4fc517334fdfd47856d1ec8707ee6d2637b2c9f377b8345385ab10", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling syn v1.0.63
[INFO] [stderr]     Checking ident_case v1.0.1
[INFO] [stderr]     Checking smallbitvec v2.5.0
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]    Compiling curl-sys v0.4.44+curl-7.77.0
[INFO] [stderr]    Compiling servo-fontconfig-sys v5.0.1
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]     Checking dtoa-short v0.3.3
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]    Compiling pathfinder_simd v0.5.0
[INFO] [stderr]    Compiling wayland-scanner v0.28.5
[INFO] [stderr]    Compiling gl v0.1.0 (/opt/rustwide/workdir/components/gl)
[INFO] [stderr]    Compiling freetype-sys v0.11.0
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]     Checking pathfinder_geometry v0.5.1
[INFO] [stderr]    Compiling wayland-client v0.28.5
[INFO] [stderr]    Compiling wayland-protocols v0.28.5
[INFO] [stderr]     Checking xcursor v0.3.3
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking nix v0.18.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking x11-dl v2.18.5
[INFO] [stderr]     Checking memmap2 v0.1.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking libz-sys v1.1.2
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking openssl-sys v0.9.60
[INFO] [stderr]     Checking libnghttp2-sys v0.1.6+1.43.0
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking polling v2.0.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking freetype v0.5.1
[INFO] [stderr]     Checking accountable-refcell v0.2.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking servo-fontconfig v0.5.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]     Checking font-kit v0.9.0 (https://github.com/twilco/font-kit#36dbce30)
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking glutin_glx_sys v0.1.7
[INFO] [stderr]     Checking darling_core v0.12.3
[INFO] [stderr]     Checking calloop v0.6.5
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]     Checking wayland-commons v0.28.5
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]     Checking cli v0.1.0 (/opt/rustwide/workdir/components/cli)
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking wayland-cursor v0.28.5
[INFO] [stderr]     Checking wayland-egl v0.28.5
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling derive_more v0.99.11
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.5
[INFO] [stderr]    Compiling tracing-attributes v0.1.14
[INFO] [stderr]    Compiling enum_dispatch v0.3.5
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]    Compiling darling_macro v0.12.3
[INFO] [stderr]    Compiling curl v0.4.38
[INFO] [stderr]    Compiling isahc v1.4.0
[INFO] [stderr]    Compiling darling v0.12.3
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking derive_builder_core v0.10.0
[INFO] [stderr]     Checking tracing v0.1.25
[INFO] [stderr]     Checking pin-project v1.0.5
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]    Compiling derive_builder_macro v0.10.0
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]     Checking derive_builder v0.10.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking app_units v0.7.1
[INFO] [stderr]     Checking primitives v0.1.0 (/opt/rustwide/workdir/components/primitives)
[INFO] [stderr]    Compiling markup5ever v0.10.0
[INFO] [stderr]     Checking kosmonaut_selectors v0.1.0 (/opt/rustwide/workdir/components/kosmonaut_selectors)
[INFO] [stderr]     Checking style v0.1.0 (/opt/rustwide/workdir/components/style)
[INFO] [stderr]     Checking dom v0.1.0 (/opt/rustwide/workdir/components/dom)
[INFO] [stderr]     Checking smithay-client-toolkit v0.12.3
[INFO] [stderr]     Checking winit v0.24.0
[INFO] [stderr]     Checking glutin v0.26.0
[INFO] [stderr]     Checking layout v0.1.0 (/opt/rustwide/workdir/components/layout)
[INFO] [stderr]     Checking display_list v0.1.0 (/opt/rustwide/workdir/components/display_list)
[INFO] [stderr]     Checking gfx v0.1.0 (/opt/rustwide/workdir/components/gfx)
[INFO] [stderr]  Documenting kosmonaut 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(destructuring_assignment)]
[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(type_name_of_val)]
[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 `kosmonaut`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name kosmonaut 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 cli=/opt/rustwide/target/debug/deps/libcli-398bd4e3cb2145b6.rmeta --extern cssparser=/opt/rustwide/target/debug/deps/libcssparser-e6e22b4c8bdeb8cd.rmeta --extern display_list=/opt/rustwide/target/debug/deps/libdisplay_list-4a0ffd9cef10ccfa.rmeta --extern dom=/opt/rustwide/target/debug/deps/libdom-415ac667decde5a5.rmeta --extern gfx=/opt/rustwide/target/debug/deps/libgfx-ac20b5ffb2453ff5.rmeta --extern gl=/opt/rustwide/target/debug/deps/libgl-df78939133ab4b7d.rmeta --extern glutin=/opt/rustwide/target/debug/deps/libglutin-e8a43b4ceb14876a.rmeta --extern html5ever=/opt/rustwide/target/debug/deps/libhtml5ever-90253d67d15a7930.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-94b3040fe52bc91d.rmeta --extern isahc=/opt/rustwide/target/debug/deps/libisahc-28ef291a40588edf.rmeta --extern kosmonaut_selectors=/opt/rustwide/target/debug/deps/libkosmonaut_selectors-a602c3dfe4f5e068.rmeta --extern layout=/opt/rustwide/target/debug/deps/liblayout-cd12a078b4166fa7.rmeta --extern primitives=/opt/rustwide/target/debug/deps/libprimitives-6e979e6ed5eadf2a.rmeta --extern style=/opt/rustwide/target/debug/deps/libstyle-56715116657491dd.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-c473fd15d9ddf341.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "fdc1cec2bd4fc517334fdfd47856d1ec8707ee6d2637b2c9f377b8345385ab10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdc1cec2bd4fc517334fdfd47856d1ec8707ee6d2637b2c9f377b8345385ab10", kill_on_drop: false }`
[INFO] [stdout] fdc1cec2bd4fc517334fdfd47856d1ec8707ee6d2637b2c9f377b8345385ab10
