[INFO] cloning repository https://github.com/porglezomp/vcd-view
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/porglezomp/vcd-view" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fporglezomp%2Fvcd-view", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fporglezomp%2Fvcd-view'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8832ef659fed6b0f841ea70a4dc330ee7bed8398
[INFO] documenting porglezomp/vcd-view 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%2Fporglezomp%2Fvcd-view" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/porglezomp/vcd-view 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/porglezomp/vcd-view
[INFO] finished tweaking git repo https://github.com/porglezomp/vcd-view
[INFO] tweaked toml for git repo https://github.com/porglezomp/vcd-view written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/porglezomp/vcd-view 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 web-view v0.2.1
[INFO] [stderr]   Downloaded webview-sys v0.1.0
[INFO] [stderr]   Downloaded vcd v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] [stdout] e21fe7363e6d713a3b507881759d1e99204e74baa179a84cad9bc626f5bb73ef
[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" "e21fe7363e6d713a3b507881759d1e99204e74baa179a84cad9bc626f5bb73ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e21fe7363e6d713a3b507881759d1e99204e74baa179a84cad9bc626f5bb73ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e21fe7363e6d713a3b507881759d1e99204e74baa179a84cad9bc626f5bb73ef", kill_on_drop: false }`
[INFO] [stdout] e21fe7363e6d713a3b507881759d1e99204e74baa179a84cad9bc626f5bb73ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 74e62e920ea7591211c440fe7958f443118d52c650da173bbc7924f879d4a37a
[INFO] running `Command { std: "docker" "start" "-a" "74e62e920ea7591211c440fe7958f443118d52c650da173bbc7924f879d4a37a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.22
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking urlencoding v1.0.0
[INFO] [stderr]     Checking vcd v0.4.0
[INFO] [stderr]     Checking term_size v0.3.1
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]    Compiling webview-sys v0.1.0
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking web-view v0.2.1
[INFO] [stderr]  Documenting vcd-view v0.2.0 (/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(nll)]
[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 `vcd-view`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name vcd_view src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=0954e8d7f31e694c -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-f6f622a2efa3354a.rmeta --extern vcd=/opt/rustwide/target/debug/deps/libvcd-9bf67a9847fbb1fe.rmeta --extern web_view=/opt/rustwide/target/debug/deps/libweb_view-3fd0b38f2db3779d.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "74e62e920ea7591211c440fe7958f443118d52c650da173bbc7924f879d4a37a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74e62e920ea7591211c440fe7958f443118d52c650da173bbc7924f879d4a37a", kill_on_drop: false }`
[INFO] [stdout] 74e62e920ea7591211c440fe7958f443118d52c650da173bbc7924f879d4a37a