[INFO] cloning repository https://github.com/crumblingstatue/wldmania
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crumblingstatue/wldmania" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fwldmania", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fwldmania'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4db98b7192f56bdfaa1833e1ef4d8cc73cfbe880
[INFO] documenting crumblingstatue/wldmania against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrumblingstatue%2Fwldmania" "/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/crumblingstatue/wldmania on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crumblingstatue/wldmania
[INFO] finished tweaking git repo https://github.com/crumblingstatue/wldmania
[INFO] tweaked toml for git repo https://github.com/crumblingstatue/wldmania written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/crumblingstatue/wldmania already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bidir-map v1.0.0
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "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] 55f0762f82ffd2817aa2b04ce8efb94e05daf7b38274d24fe41653eef8907e8a
[INFO] running `Command { std: "docker" "start" "-a" "55f0762f82ffd2817aa2b04ce8efb94e05daf7b38274d24fe41653eef8907e8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "55f0762f82ffd2817aa2b04ce8efb94e05daf7b38274d24fe41653eef8907e8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55f0762f82ffd2817aa2b04ce8efb94e05daf7b38274d24fe41653eef8907e8a", kill_on_drop: false }`
[INFO] [stdout] 55f0762f82ffd2817aa2b04ce8efb94e05daf7b38274d24fe41653eef8907e8a
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "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] b90fb09b747b8d1050c11348e3fc7d49b52732e00e03ee9bb88048525537f22b
[INFO] running `Command { std: "docker" "start" "-a" "b90fb09b747b8d1050c11348e3fc7d49b52732e00e03ee9bb88048525537f22b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]     Checking bidir-map v1.0.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]  Documenting wldmania 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:1:1
[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 `wldmania`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name wldmania src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern ansi_term=/opt/rustwide/target/debug/deps/libansi_term-4180737bb07af6bb.rmeta --extern bidir_map=/opt/rustwide/target/debug/deps/libbidir_map-b45d8215bc8ed650.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-364c148656283980.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-2b67e64c435b8b2a.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a1c846d99c3eb67d.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "b90fb09b747b8d1050c11348e3fc7d49b52732e00e03ee9bb88048525537f22b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b90fb09b747b8d1050c11348e3fc7d49b52732e00e03ee9bb88048525537f22b", kill_on_drop: false }`
[INFO] [stdout] b90fb09b747b8d1050c11348e3fc7d49b52732e00e03ee9bb88048525537f22b
