[INFO] fetching crate libdrm 0.0.2...
[INFO] documenting libdrm-0.0.2 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate libdrm 0.0.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate libdrm 0.0.2 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libdrm 0.0.2
[INFO] finished tweaking crates.io crate libdrm 0.0.2
[INFO] tweaked toml for crates.io crate libdrm 0.0.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallvec v0.3.4
[INFO] [stderr]   Downloaded drm-sys v0.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2021-08-01" "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] 3f9fb3d990258a048585e4f4fc5831b43eb1b632686da7e59bfd10deafa3275d
[INFO] running `Command { std: "docker" "start" "-a" "3f9fb3d990258a048585e4f4fc5831b43eb1b632686da7e59bfd10deafa3275d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f9fb3d990258a048585e4f4fc5831b43eb1b632686da7e59bfd10deafa3275d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f9fb3d990258a048585e4f4fc5831b43eb1b632686da7e59bfd10deafa3275d", kill_on_drop: false }`
[INFO] [stdout] 3f9fb3d990258a048585e4f4fc5831b43eb1b632686da7e59bfd10deafa3275d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+beta-2021-08-01" "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] a4bf5bb573a6e5da71c1437e8beaaa553492c8c7533f7eae52183fa5e9853874
[INFO] running `Command { std: "docker" "start" "-a" "a4bf5bb573a6e5da71c1437e8beaaa553492c8c7533f7eae52183fa5e9853874", kill_on_drop: false }`
[INFO] [stderr]    Compiling drm-sys v0.0.3
[INFO] [stderr]     Checking smallvec v0.3.4
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]  Documenting libdrm v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(concat_idents)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(type_ascription)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(conservative_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[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] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 `libdrm`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name libdrm src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern drm_sys=/opt/rustwide/target/debug/deps/libdrm_sys-adad1939e8fa6641.rmeta --extern error_chain=/opt/rustwide/target/debug/deps/liberror_chain-76de9f5b073efec1.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-34f3b748d9af774b.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-527c8d86990a454a.rmeta --cap-lints=warn --crate-version 0.0.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a4bf5bb573a6e5da71c1437e8beaaa553492c8c7533f7eae52183fa5e9853874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4bf5bb573a6e5da71c1437e8beaaa553492c8c7533f7eae52183fa5e9853874", kill_on_drop: false }`
[INFO] [stdout] a4bf5bb573a6e5da71c1437e8beaaa553492c8c7533f7eae52183fa5e9853874
