[INFO] fetching crate castaway 0.2.1...
[INFO] documenting castaway-0.2.1 against try#6fd27704e643b25711e6a97ec2b04873b411b97d for pr-96676
[INFO] extracting crate castaway 0.2.1 into /workspace/builds/worker-57/source
[INFO] validating manifest of crates.io crate castaway 0.2.1 on toolchain 6fd27704e643b25711e6a97ec2b04873b411b97d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate castaway 0.2.1
[INFO] finished tweaking crates.io crate castaway 0.2.1
[INFO] tweaked toml for crates.io crate castaway 0.2.1 written to /workspace/builds/worker-57/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ea0c5cc5fd33e8269abb6385a0a67745346d6a92f00f1e3627f3521c95e8137
[INFO] running `Command { std: "docker" "start" "-a" "1ea0c5cc5fd33e8269abb6385a0a67745346d6a92f00f1e3627f3521c95e8137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ea0c5cc5fd33e8269abb6385a0a67745346d6a92f00f1e3627f3521c95e8137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ea0c5cc5fd33e8269abb6385a0a67745346d6a92f00f1e3627f3521c95e8137", kill_on_drop: false }`
[INFO] [stdout] 1ea0c5cc5fd33e8269abb6385a0a67745346d6a92f00f1e3627f3521c95e8137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-57/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=forbid" "-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" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c00be55062f65a591c571104ea0f90a4767402828aaf2dd1c6ee1eadca933084
[INFO] running `Command { std: "docker" "start" "-a" "c00be55062f65a591c571104ea0f90a4767402828aaf2dd1c6ee1eadca933084", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]  Documenting castaway v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]  --> src/lifetime_free.rs:5:29
[INFO] [stdout]   |
[INFO] [stdout] 5 | /// This trait is used by [`cast!`] to determine what casts are legal on values
[INFO] [stdout]   |                             ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[deny(rustdoc::macro_rules_fallback)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `castaway`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name castaway src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a2274726bfe08ec6 -L dependency=/opt/rustwide/target/debug/deps --extern rustversion=/opt/rustwide/target/debug/deps/librustversion-e67a322b869b9b50.so --cap-lints=forbid --crate-version 0.2.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c00be55062f65a591c571104ea0f90a4767402828aaf2dd1c6ee1eadca933084", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c00be55062f65a591c571104ea0f90a4767402828aaf2dd1c6ee1eadca933084", kill_on_drop: false }`
[INFO] [stdout] c00be55062f65a591c571104ea0f90a4767402828aaf2dd1c6ee1eadca933084