[INFO] updating cached repository https://github.com/Yuhanun/y-lang
[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] 5b626cdac5239bec6fd920327ad31bd04cc2bab7
[INFO] documenting Yuhanun/y-lang against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYuhanun%2Fy-lang" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yuhanun/y-lang on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Yuhanun/y-lang
[INFO] finished tweaking git repo https://github.com/Yuhanun/y-lang
[INFO] tweaked toml for git repo https://github.com/Yuhanun/y-lang written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Yuhanun/y-lang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "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] 79628d93d517e163d8b6c4c1522a638c6c012ea95a60e009a6a395bf472b7346
[INFO] running `Command { std: "docker" "start" "-a" "79628d93d517e163d8b6c4c1522a638c6c012ea95a60e009a6a395bf472b7346", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79628d93d517e163d8b6c4c1522a638c6c012ea95a60e009a6a395bf472b7346", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79628d93d517e163d8b6c4c1522a638c6c012ea95a60e009a6a395bf472b7346", kill_on_drop: false }`
[INFO] [stdout] 79628d93d517e163d8b6c4c1522a638c6c012ea95a60e009a6a395bf472b7346
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f52ffbc0eb5273abb0a9f85bab9443e86361ea3b82ba364bc334e7d992b8145d
[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" "f52ffbc0eb5273abb0a9f85bab9443e86361ea3b82ba364bc334e7d992b8145d", kill_on_drop: false }`
[INFO] [stderr]     Checking y_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting y_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `own_tokens`
[INFO] [stdout]  --> tokenizer/tokens.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     own_tokens: &'a [&'a str],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `delimiters`
[INFO] [stdout]  --> tokenizer/tokens.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     delimiters: &'a [&'a str],
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `last_token_end`
[INFO] [stdout]  --> tokenizer/tokens.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     last_token_end: usize,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.09s
[INFO] running `Command { std: "docker" "inspect" "f52ffbc0eb5273abb0a9f85bab9443e86361ea3b82ba364bc334e7d992b8145d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f52ffbc0eb5273abb0a9f85bab9443e86361ea3b82ba364bc334e7d992b8145d", kill_on_drop: false }`
[INFO] [stdout] f52ffbc0eb5273abb0a9f85bab9443e86361ea3b82ba364bc334e7d992b8145d