[INFO] fetching crate arranged 0.1.2...
[INFO] documenting arranged-0.1.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate arranged 0.1.2 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate arranged 0.1.2 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-12/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate arranged 0.1.2
[INFO] finished tweaking crates.io crate arranged 0.1.2
[INFO] tweaked toml for crates.io crate arranged 0.1.2 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arith_traits v0.2.0
[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" "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" "+1.61.0" "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] c0bfb7c51ed9bad856f6f2bce42febf8ba0ecbe582fb9ed1092fbe0bb76fa1f7
[INFO] running `Command { std: "docker" "start" "-a" "c0bfb7c51ed9bad856f6f2bce42febf8ba0ecbe582fb9ed1092fbe0bb76fa1f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0bfb7c51ed9bad856f6f2bce42febf8ba0ecbe582fb9ed1092fbe0bb76fa1f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0bfb7c51ed9bad856f6f2bce42febf8ba0ecbe582fb9ed1092fbe0bb76fa1f7", kill_on_drop: false }`
[INFO] [stdout] c0bfb7c51ed9bad856f6f2bce42febf8ba0ecbe582fb9ed1092fbe0bb76fa1f7
[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" "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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", 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] c1412f2e86cdf54cde97b39b0556fc0a9bc41157f0c8fac1f041ffaec308472e
[INFO] running `Command { std: "docker" "start" "-a" "c1412f2e86cdf54cde97b39b0556fc0a9bc41157f0c8fac1f041ffaec308472e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking num-complex v0.4.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking arith_traits v0.2.0
[INFO] [stderr]  Documenting arranged v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / #![feature(
[INFO] [stdout] 2  | |     associated_type_bounds,
[INFO] [stdout] 3  | |     backtrace,
[INFO] [stdout] 4  | |     const_convert,
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | |     unchecked_math
[INFO] [stdout] 14 | | )]
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `arranged`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name arranged src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=69b48bb4d5972e30 -L dependency=/opt/rustwide/target/debug/deps --extern arith_traits=/opt/rustwide/target/debug/deps/libarith_traits-cf7394a5fce94ef0.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-f204dffd313cdfd5.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-e2b505227539d712.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-319fbcaa4ea4e01f.rmeta --cap-lints=warn --crate-version 0.1.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "c1412f2e86cdf54cde97b39b0556fc0a9bc41157f0c8fac1f041ffaec308472e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1412f2e86cdf54cde97b39b0556fc0a9bc41157f0c8fac1f041ffaec308472e", kill_on_drop: false }`
[INFO] [stdout] c1412f2e86cdf54cde97b39b0556fc0a9bc41157f0c8fac1f041ffaec308472e