[INFO] cloning repository https://github.com/KristonCosta/four-am
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KristonCosta/four-am" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKristonCosta%2Ffour-am", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKristonCosta%2Ffour-am'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c977ccb8a42a73fc0839d4a72dd51409b75e7d3c
[INFO] documenting KristonCosta/four-am 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%2FKristonCosta%2Ffour-am" "/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/KristonCosta/four-am 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/KristonCosta/four-am
[INFO] finished tweaking git repo https://github.com/KristonCosta/four-am
[INFO] tweaked toml for git repo https://github.com/KristonCosta/four-am written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/KristonCosta/four-am 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-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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 463bcb9d03917790251809af436c382bc7b79388876079c40282a00a7e9b6b18
[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" "463bcb9d03917790251809af436c382bc7b79388876079c40282a00a7e9b6b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "463bcb9d03917790251809af436c382bc7b79388876079c40282a00a7e9b6b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "463bcb9d03917790251809af436c382bc7b79388876079c40282a00a7e9b6b18", kill_on_drop: false }`
[INFO] [stdout] 463bcb9d03917790251809af436c382bc7b79388876079c40282a00a7e9b6b18
[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" "+1.46.0" "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] 388b36fff11d67b2704cc3a6f342dcab2a93565aef8bfcf4fb73d304ebbbca50
[INFO] running `Command { std: "docker" "start" "-a" "388b36fff11d67b2704cc3a6f342dcab2a93565aef8bfcf4fb73d304ebbbca50", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling xml-rs v0.8.1
[INFO] [stderr]    Compiling encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling mac v0.1.1
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]    Compiling RustyXML v0.1.1
[INFO] [stderr]     Checking instant v0.1.2
[INFO] [stderr]     Checking array-macro v1.0.4
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling utf-8 v0.6.0
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]    Compiling encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-japanese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-korean v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]    Compiling encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]    Compiling futf v0.1.4
[INFO] [stderr]    Compiling unreachable v0.1.1
[INFO] [stderr]    Compiling four-am v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling stdweb v0.4.20
[INFO] [stderr]     Checking pathfinding v2.0.4
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]    Compiling debug_unreachable v0.1.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.14
[INFO] [stderr]    Compiling tracing-attributes v0.1.7
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]    Compiling paste-impl v0.1.10
[INFO] [stderr]    Compiling specs-derive v0.4.1
[INFO] [stderr]     Checking rusttype v0.8.2
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling encoding v0.2.33
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]    Compiling wayland-scanner v0.23.6
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]    Compiling tendril v0.2.4
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking paste v0.1.10
[INFO] [stderr]     Checking enum-map v0.6.2
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking parking_lot_core v0.7.0
[INFO] [stderr]     Checking x11-dl v2.18.5
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking nix v0.15.0
[INFO] [stderr]     Checking raw-window-handle v0.3.3
[INFO] [stderr]     Checking libudev-sys v0.1.4
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.6
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.4
[INFO] [stderr]    Compiling glow v0.4.0
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking parking_lot v0.10.0
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[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking thiserror v1.0.14
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking legion-core v0.2.1 (https://github.com/TomGillen/legion.git#24091d73)
[INFO] [stderr]    Compiling wayland-client v0.23.6
[INFO] [stderr]    Compiling wayland-protocols v0.23.6
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]     Checking simple_logger v1.6.0
[INFO] [stderr]    Compiling string_cache_codegen v0.3.1
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling html5ever v0.13.1
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]    Compiling string_cache v0.4.0
[INFO] [stderr]    Compiling html5ever-atoms v0.2.2
[INFO] [stderr]     Checking calloop v0.4.4
[INFO] [stderr]     Checking wayland-commons v0.23.6
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]    Compiling stdweb-derive v0.5.3
[INFO] [stderr]     Checking gilrs-core v0.2.5
[INFO] [stderr]     Checking gestalt v0.1.0
[INFO] [stderr]     Checking image v0.22.5
[INFO] [stderr]     Checking image v0.23.3
[INFO] [stderr]     Checking gilrs v0.7.4
[INFO] [stderr]    Compiling lalrpop v0.16.3
[INFO] [stderr]    Compiling stdweb-internal-macros v0.2.9
[INFO] [stderr]     Checking legion-systems v0.2.1 (https://github.com/TomGillen/legion.git#24091d73)
[INFO] [stderr]    Compiling html2runes v1.0.1
[INFO] [stderr]     Checking smithay-client-toolkit v0.6.6
[INFO] [stderr]     Checking golem v0.1.3
[INFO] [stderr]     Checking legion v0.2.1 (https://github.com/TomGillen/legion.git#24091d73)
[INFO] [stderr]     Checking winit v0.20.0
[INFO] [stderr]     Checking glutin v0.22.1
[INFO] [stderr]     Checking platter v0.1.4
[INFO] [stderr]    Compiling webidl v0.8.0
[INFO] [stderr]    Compiling webgl_generator v0.2.0
[INFO] [stderr]    Compiling webgl_stdweb v0.3.0
[INFO] [stderr]     Checking blinds v0.1.2
[INFO] [stderr]     Checking quicksilver v0.4.0-alpha0.2 (https://github.com/ryanisaacg/quicksilver#a2ee77bb)
[INFO] [stderr]  Documenting four-am 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(vec_remove_item)]
[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 `four-am`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name four_am 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 crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-dd430c7c264e2a00.rmeta --extern euclid=/opt/rustwide/target/debug/deps/libeuclid-7598b68e9fd970ab.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-98e4a628e43d19a1.rmeta --extern instant=/opt/rustwide/target/debug/deps/libinstant-56aaccabf3594d25.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-57a7edc7f441d44c.rmeta --extern legion=/opt/rustwide/target/debug/deps/liblegion-2604cc047952aeff.rmeta --extern pathfinding=/opt/rustwide/target/debug/deps/libpathfinding-90982016785eb769.rmeta --extern quicksilver=/opt/rustwide/target/debug/deps/libquicksilver-e4e60b7ae76f66ea.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-8bc0c707c284bea3.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-a71b2caad82a4f79.rmeta --extern rusttype=/opt/rustwide/target/debug/deps/librusttype-2c4de074bc7ea845.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-0772f3cf16643e49.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-bb6a361223cbe5e8.rmeta --extern specs_derive=/opt/rustwide/target/debug/deps/libspecs_derive-e4933d900592395f.so --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "388b36fff11d67b2704cc3a6f342dcab2a93565aef8bfcf4fb73d304ebbbca50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "388b36fff11d67b2704cc3a6f342dcab2a93565aef8bfcf4fb73d304ebbbca50", kill_on_drop: false }`
[INFO] [stdout] 388b36fff11d67b2704cc3a6f342dcab2a93565aef8bfcf4fb73d304ebbbca50