[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 beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmcoffin%2Fvk-playground" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mcoffin/vk-playground on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", 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-9/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" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-rational v0.1.39
[INFO] [stderr]   Downloaded num-complex v0.1.40
[INFO] [stderr]   Downloaded nom v1.2.4
[INFO] [stderr]   Downloaded shared_library v0.1.7
[INFO] [stderr]   Downloaded semver v0.2.3
[INFO] [stderr]   Downloaded num-bigint v0.1.40
[INFO] [stderr]   Downloaded ash v0.18.4
[INFO] [stderr]   Downloaded vk-sys v0.2.7
[INFO] [stderr]   Downloaded glfw v0.17.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 826e9dbfd7e191d468c956c999a37f8669acf17e9ee7f48d3ba9a7c267549d15
[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" "826e9dbfd7e191d468c956c999a37f8669acf17e9ee7f48d3ba9a7c267549d15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "826e9dbfd7e191d468c956c999a37f8669acf17e9ee7f48d3ba9a7c267549d15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "826e9dbfd7e191d468c956c999a37f8669acf17e9ee7f48d3ba9a7c267549d15", kill_on_drop: false }`
[INFO] [stdout] 826e9dbfd7e191d468c956c999a37f8669acf17e9ee7f48d3ba9a7c267549d15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac0cc6526615a7fca4a507558fa8ce534c36b866150cf1f230fedcb9234c3366
[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" "ac0cc6526615a7fca4a507558fa8ce534c36b866150cf1f230fedcb9234c3366", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.30
[INFO] [stderr]     Checking nom v1.2.4
[INFO] [stderr]     Checking vk-sys v0.2.7
[INFO] [stderr]     Checking num-complex v0.1.40
[INFO] [stderr]     Checking thread_local v0.3.4
[INFO] [stderr]     Checking semver v0.2.3
[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 env_logger v0.4.3
[INFO] [stderr]     Checking num-rational v0.1.39
[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 beta 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] 
[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 `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 --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern ash=/opt/rustwide/target/debug/deps/libash-cfb112ca05c0b4e5.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-02892cb06e3ff4eb.rmeta --extern glfw=/opt/rustwide/target/debug/deps/libglfw-e66d7de681e7c7eb.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-b655fcdafb8e3d6a.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-e8073698be3683f7.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "ac0cc6526615a7fca4a507558fa8ce534c36b866150cf1f230fedcb9234c3366", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac0cc6526615a7fca4a507558fa8ce534c36b866150cf1f230fedcb9234c3366", kill_on_drop: false }`
[INFO] [stdout] ac0cc6526615a7fca4a507558fa8ce534c36b866150cf1f230fedcb9234c3366