[INFO] fetching crate u-plus 1.0.0...
[INFO] documenting u-plus-1.0.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate u-plus 1.0.0 into /workspace/builds/worker-17/source
[INFO] validating manifest of crates.io crate u-plus 1.0.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate u-plus 1.0.0
[INFO] finished tweaking crates.io crate u-plus 1.0.0
[INFO] tweaked toml for crates.io crate u-plus 1.0.0 written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d4d10d38a3aac906b3c2b1b41b20e71a6d43b202992af4da0df885525dd08d0c
[INFO] running `Command { std: "docker" "start" "-a" "d4d10d38a3aac906b3c2b1b41b20e71a6d43b202992af4da0df885525dd08d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4d10d38a3aac906b3c2b1b41b20e71a6d43b202992af4da0df885525dd08d0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4d10d38a3aac906b3c2b1b41b20e71a6d43b202992af4da0df885525dd08d0c", kill_on_drop: false }`
[INFO] [stdout] d4d10d38a3aac906b3c2b1b41b20e71a6d43b202992af4da0df885525dd08d0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 882e95ae001ee91a7b328e9b4336fee6b58230af3bfd71a4cb8a1357213990eb
[INFO] running `Command { std: "docker" "start" "-a" "882e95ae001ee91a7b328e9b4336fee6b58230af3bfd71a4cb8a1357213990eb", kill_on_drop: false }`
[INFO] [stderr]  Documenting u-plus v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: const trait impls are experimental
[INFO] [stdout]   --> src/lib.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl const Add<u32> for U {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: const trait impls are experimental
[INFO] [stdout]   --> src/lib.rs:26:6
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl const Add<f32> for U {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: const trait impls are experimental
[INFO] [stdout]   --> src/lib.rs:43:6
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl const Add<f64> for U {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `u-plus`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name u_plus src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bb6c1979a357a9b9 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "882e95ae001ee91a7b328e9b4336fee6b58230af3bfd71a4cb8a1357213990eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "882e95ae001ee91a7b328e9b4336fee6b58230af3bfd71a4cb8a1357213990eb", kill_on_drop: false }`
[INFO] [stdout] 882e95ae001ee91a7b328e9b4336fee6b58230af3bfd71a4cb8a1357213990eb