[INFO] updating cached repository https://github.com/kmBlaine/yucon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b45c3783ed4fd6b7323734d8f2d699161d623ca0
[INFO] documenting kmBlaine/yucon against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FkmBlaine%2Fyucon" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kmBlaine/yucon on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kmBlaine/yucon
[INFO] finished tweaking git repo https://github.com/kmBlaine/yucon
[INFO] tweaked toml for git repo https://github.com/kmBlaine/yucon written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/kmBlaine/yucon already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea0085bea28a35169ccc65d85987bec8bf48d548f380c354659eccc47a60353a
[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" "ea0085bea28a35169ccc65d85987bec8bf48d548f380c354659eccc47a60353a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea0085bea28a35169ccc65d85987bec8bf48d548f380c354659eccc47a60353a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea0085bea28a35169ccc65d85987bec8bf48d548f380c354659eccc47a60353a", kill_on_drop: false }`
[INFO] [stdout] ea0085bea28a35169ccc65d85987bec8bf48d548f380c354659eccc47a60353a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2164ae6d8df993a35d682a8b5c35345c103a6e873a66d041d18765fbea781fb7
[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" "2164ae6d8df993a35d682a8b5c35345c103a6e873a66d041d18765fbea781fb7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Documenting yucon v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0252]: the name `Write` is defined multiple times
[INFO] [stdout]   --> src/runtime/mod.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | use std::fmt::Write;
[INFO] [stdout]    |     --------------- previous import of the trait `Write` here
[INFO] [stdout] ...
[INFO] [stdout] 46 | use std::io::Write;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^ `Write` reimported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Write` must be defined only once in the type namespace of this module
[INFO] [stdout] help: you can use `as` to change the binding name of the import
[INFO] [stdout]    |
[INFO] [stdout] 46 | use std::io::Write as OtherWrite;
[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 E0252`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `yucon`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name yucon 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 --cap-lints=forbid` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "2164ae6d8df993a35d682a8b5c35345c103a6e873a66d041d18765fbea781fb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2164ae6d8df993a35d682a8b5c35345c103a6e873a66d041d18765fbea781fb7", kill_on_drop: false }`
[INFO] [stdout] 2164ae6d8df993a35d682a8b5c35345c103a6e873a66d041d18765fbea781fb7