[INFO] cloning repository https://github.com/mcoffin/vk-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mcoffin/vk-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcoffin%2Fvk-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcoffin%2Fvk-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f4ce9888705f152a314cbc42fccb45954cd82f2a
[INFO] documenting mcoffin/vk-playground 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%2Fmcoffin%2Fvk-playground" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mcoffin/vk-playground 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/mcoffin/vk-playground
[INFO] finished tweaking git repo https://github.com/mcoffin/vk-playground
[INFO] tweaked toml for git repo https://github.com/mcoffin/vk-playground written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/mcoffin/vk-playground 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 num-complex v0.1.40
[INFO] [stderr]   Downloaded semver v0.2.3
[INFO] [stderr]   Downloaded env_logger v0.4.3
[INFO] [stderr]   Downloaded num-bigint v0.1.40
[INFO] [stderr]   Downloaded shared_library v0.1.7
[INFO] [stderr]   Downloaded num-rational v0.1.39
[INFO] [stderr]   Downloaded vk-sys v0.2.7
[INFO] [stderr]   Downloaded ash v0.18.4
[INFO] [stderr]   Downloaded glfw v0.17.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 1cacdc3925c83b8e6ecfce9e00618f7abe70d1b9e6b47119a3dafa009da58799
[INFO] running `Command { std: "docker" "start" "-a" "1cacdc3925c83b8e6ecfce9e00618f7abe70d1b9e6b47119a3dafa009da58799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cacdc3925c83b8e6ecfce9e00618f7abe70d1b9e6b47119a3dafa009da58799", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cacdc3925c83b8e6ecfce9e00618f7abe70d1b9e6b47119a3dafa009da58799", kill_on_drop: false }`
[INFO] [stdout] 1cacdc3925c83b8e6ecfce9e00618f7abe70d1b9e6b47119a3dafa009da58799
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ebc8077a7327dea8ec26b8ccbd3abad52dc67b30377a8ea0f35860ff52a60f89
[INFO] running `Command { std: "docker" "start" "-a" "ebc8077a7327dea8ec26b8ccbd3abad52dc67b30377a8ea0f35860ff52a60f89", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]     Checking regex-syntax v0.4.1
[INFO] [stderr]     Checking vk-sys v0.2.7
[INFO] [stderr]     Checking num-complex v0.1.40
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking shared_library v0.1.7
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking ash v0.18.4
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking num-bigint v0.1.40
[INFO] [stderr]     Checking num-rational v0.1.39
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]     Checking glfw v0.17.0
[INFO] [stderr]  Documenting vk-playground 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:1:38
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature = "safe_create", feature(conservative_impl_trait, unboxed_closures))]
[INFO] [stdout]   |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/main.rs:388:21
[INFO] [stdout]     |
[INFO] [stdout] 388 |                     (properties.device_type == PhysicalDeviceType::DiscreteGpu && features.geometry_shader != 0)
[INFO] [stdout]     |                     ^                                                                                          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 388 -                     (properties.device_type == PhysicalDeviceType::DiscreteGpu && features.geometry_shader != 0)
[INFO] [stdout] 388 +                     properties.device_type == PhysicalDeviceType::DiscreteGpu && features.geometry_shader != 0
[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; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `vk-playground`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name vk_playground src/main.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="safe_create"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1d5d47662b2052fd -L dependency=/opt/rustwide/target/debug/deps --extern ash=/opt/rustwide/target/debug/deps/libash-aaac83d1cf3f6d4a.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-984871a1c0c22ec9.rmeta --extern glfw=/opt/rustwide/target/debug/deps/libglfw-613ffe02ad1507b4.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-609eda97f6b3ae0b.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-31d53f89032b28f2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ebc8077a7327dea8ec26b8ccbd3abad52dc67b30377a8ea0f35860ff52a60f89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebc8077a7327dea8ec26b8ccbd3abad52dc67b30377a8ea0f35860ff52a60f89", kill_on_drop: false }`
[INFO] [stdout] ebc8077a7327dea8ec26b8ccbd3abad52dc67b30377a8ea0f35860ff52a60f89