[INFO] cloning repository https://github.com/frewsxcv/toggle-grayscale
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/frewsxcv/toggle-grayscale" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrewsxcv%2Ftoggle-grayscale", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffrewsxcv%2Ftoggle-grayscale'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8b0a783af016216237421d592ba3a154c5e542f5
[INFO] documenting frewsxcv/toggle-grayscale 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%2Ffrewsxcv%2Ftoggle-grayscale" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/frewsxcv/toggle-grayscale 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/frewsxcv/toggle-grayscale
[INFO] finished tweaking git repo https://github.com/frewsxcv/toggle-grayscale
[INFO] tweaked toml for git repo https://github.com/frewsxcv/toggle-grayscale written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/frewsxcv/toggle-grayscale 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]  Downloading crates ...
[INFO] [stderr]   Downloaded sysbar v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 8feef750df59cd3b72c7965e9b3966d9ec6872aa9c8e8f22ee15772c0b74d5ce
[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" "8feef750df59cd3b72c7965e9b3966d9ec6872aa9c8e8f22ee15772c0b74d5ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8feef750df59cd3b72c7965e9b3966d9ec6872aa9c8e8f22ee15772c0b74d5ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8feef750df59cd3b72c7965e9b3966d9ec6872aa9c8e8f22ee15772c0b74d5ce", kill_on_drop: false }`
[INFO] [stdout] 8feef750df59cd3b72c7965e9b3966d9ec6872aa9c8e8f22ee15772c0b74d5ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 90341e8326be17554220e556acce11ae3cddcb3080890d5736249b25f7b392e3
[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" "90341e8326be17554220e556acce11ae3cddcb3080890d5736249b25f7b392e3", kill_on_drop: false }`
[INFO] [stderr]     Checking sysbar v0.2.0
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `SysbarImpl`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/sysbar-0.2.0/src/lib.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 |         Sysbar(SysbarImpl::new(name))
[INFO] [stdout]    |                ^^^^^^^^^^ use of undeclared type or module `SysbarImpl`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `SysbarImpl` in this scope
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/sysbar-0.2.0/src/lib.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Sysbar(SysbarImpl);
[INFO] [stdout]   |                   ^^^^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sysbar`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "90341e8326be17554220e556acce11ae3cddcb3080890d5736249b25f7b392e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90341e8326be17554220e556acce11ae3cddcb3080890d5736249b25f7b392e3", kill_on_drop: false }`
[INFO] [stdout] 90341e8326be17554220e556acce11ae3cddcb3080890d5736249b25f7b392e3