[INFO] cloning repository https://github.com/nebulaeandstars/conway
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nebulaeandstars/conway" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebulaeandstars%2Fconway", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebulaeandstars%2Fconway'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e854a1cd609d3fb7d7c74518db7ff8e0a598af39
[INFO] documenting nebulaeandstars/conway against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnebulaeandstars%2Fconway" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nebulaeandstars/conway on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nebulaeandstars/conway
[INFO] finished tweaking git repo https://github.com/nebulaeandstars/conway
[INFO] tweaked toml for git repo https://github.com/nebulaeandstars/conway written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/nebulaeandstars/conway already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cc v1.0.68
[INFO] [stderr]   Downloaded thiserror v1.0.25
[INFO] [stderr]   Downloaded bytemuck v1.5.1
[INFO] [stderr]   Downloaded gif v0.11.2
[INFO] [stderr]   Downloaded wayland-commons v0.28.5
[INFO] [stderr]   Downloaded wayland-scanner v0.28.5
[INFO] [stderr]   Downloaded wayland-sys v0.28.5
[INFO] [stderr]   Downloaded wayland-egl v0.28.5
[INFO] [stderr]   Downloaded pistoncore-glutin_window v0.68.2
[INFO] [stderr]   Downloaded lock_api v0.4.4
[INFO] [stderr]   Downloaded once_cell v1.7.2
[INFO] [stderr]   Downloaded syn v1.0.73
[INFO] [stderr]   Downloaded thiserror-impl v1.0.25
[INFO] [stderr]   Downloaded wayland-protocols v0.28.5
[INFO] [stderr]   Downloaded libc v0.2.96
[INFO] [stderr]   Downloaded libloading v0.7.0
[INFO] [stderr]   Downloaded redox_syscall v0.2.8
[INFO] [stderr]   Downloaded proc-macro2 v1.0.27
[INFO] [stderr]   Downloaded wayland-cursor v0.28.5
[INFO] [stderr]   Downloaded wayland-client v0.28.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "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] 378fb98c46fe8e4062b63e124201e6689895f27db89a34fbfcd7a0527fb030b3
[INFO] running `Command { std: "docker" "start" "-a" "378fb98c46fe8e4062b63e124201e6689895f27db89a34fbfcd7a0527fb030b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "378fb98c46fe8e4062b63e124201e6689895f27db89a34fbfcd7a0527fb030b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "378fb98c46fe8e4062b63e124201e6689895f27db89a34fbfcd7a0527fb030b3", kill_on_drop: false }`
[INFO] [stdout] 378fb98c46fe8e4062b63e124201e6689895f27db89a34fbfcd7a0527fb030b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d6f8b6b44cd5cda70e1236910e43aefd966b7e9a43627c2b6e2bbe6b80782c8
[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" "2d6f8b6b44cd5cda70e1236910e43aefd966b7e9a43627c2b6e2bbe6b80782c8", kill_on_drop: false }`
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking libloading v0.7.0
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking libloading v0.6.7
[INFO] [stderr]    Compiling wayland-sys v0.28.5
[INFO] [stderr]    Compiling nom v6.1.2
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking nix v0.18.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking shared_library v0.1.9
[INFO] [stderr]     Checking crc32fast v1.2.1
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling gl_generator v0.13.1
[INFO] [stderr]     Checking x11-dl v2.18.5
[INFO] [stderr]     Checking andrew v0.3.1
[INFO] [stderr]     Checking piston2d-graphics v0.39.0
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking dlib v0.4.2
[INFO] [stderr]     Checking osmesa-sys v0.1.2
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking rand_core v0.6.2
[INFO] [stderr]     Checking dlib v0.5.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling wayland-scanner v0.28.5
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking rand v0.8.3
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.7
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.5
[INFO] [stderr]    Compiling gl v0.13.0
[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 wayland-commons v0.28.5
[INFO] [stderr]     Checking calloop v0.6.5
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]     Checking wayland-cursor v0.28.5
[INFO] [stderr]     Checking wayland-egl v0.28.5
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.77.0
[INFO] [stderr]     Checking pistoncore-input v1.0.0
[INFO] [stderr]     Checking pistoncore-window v0.47.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.52.0
[INFO] [stderr]     Checking piston v0.52.1
[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 pistoncore-glutin_window v0.68.2
[INFO] [stderr]  Documenting conway 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `conway`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name conway src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=3eca2340c3a7d184 -L dependency=/opt/rustwide/target/debug/deps --extern piston=/opt/rustwide/target/debug/deps/libpiston-66836c191f91d3dc.rmeta --extern graphics=/opt/rustwide/target/debug/deps/libgraphics-a84e8635412fb793.rmeta --extern opengl_graphics=/opt/rustwide/target/debug/deps/libopengl_graphics-5523ecdeb660ce3d.rmeta --extern glutin_window=/opt/rustwide/target/debug/deps/libglutin_window-fe34539bb0af8bef.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-9e875ae115340140.rmeta --extern rayon=/opt/rustwide/target/debug/deps/librayon-db0e86f5d7891cf8.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2d6f8b6b44cd5cda70e1236910e43aefd966b7e9a43627c2b6e2bbe6b80782c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d6f8b6b44cd5cda70e1236910e43aefd966b7e9a43627c2b6e2bbe6b80782c8", kill_on_drop: false }`
[INFO] [stdout] 2d6f8b6b44cd5cda70e1236910e43aefd966b7e9a43627c2b6e2bbe6b80782c8