[INFO] fetching crate scaled 0.0.3...
[INFO] documenting scaled-0.0.3 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate scaled 0.0.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate scaled 0.0.3 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] started tweaking crates.io crate scaled 0.0.3
[INFO] finished tweaking crates.io crate scaled 0.0.3
[INFO] tweaked toml for crates.io crate scaled 0.0.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate scaled 0.0.3 already has a lockfile, it will not be regenerated
[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 integer-sqrt v0.1.5
[INFO] [stderr]   Downloaded fixed-sqrt v0.2.4
[INFO] [stderr]   Downloaded euclid v0.22.1
[INFO] [stderr]   Downloaded fixed v1.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] f71121141875d74d45bad8f973eca5332f5da4add4957551480663fed631cbd6
[INFO] running `Command { std: "docker" "start" "-a" "f71121141875d74d45bad8f973eca5332f5da4add4957551480663fed631cbd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f71121141875d74d45bad8f973eca5332f5da4add4957551480663fed631cbd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f71121141875d74d45bad8f973eca5332f5da4add4957551480663fed631cbd6", kill_on_drop: false }`
[INFO] [stdout] f71121141875d74d45bad8f973eca5332f5da4add4957551480663fed631cbd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 171c5f2df91fd2a4f9bed6c0d66084c5c7618aba8763842a5a38d7d6135f8926
[INFO] running `Command { std: "docker" "start" "-a" "171c5f2df91fd2a4f9bed6c0d66084c5c7618aba8763842a5a38d7d6135f8926", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling fixed v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking integer-sqrt v0.1.5
[INFO] [stderr]     Checking euclid v0.22.1
[INFO] [stderr]     Checking fixed-sqrt v0.2.4
[INFO] [stderr]  Documenting scaled v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(associated_type_defaults)]
[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 `scaled`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name scaled src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f19ece3989613bea -L dependency=/opt/rustwide/target/debug/deps --extern euclid=/opt/rustwide/target/debug/deps/libeuclid-1b2dc80f456b9de9.rmeta --extern fixed=/opt/rustwide/target/debug/deps/libfixed-9b63e62afe28fe00.rmeta --extern fixed_sqrt=/opt/rustwide/target/debug/deps/libfixed_sqrt-e8ffba400aba69fb.rmeta --cap-lints=warn --crate-version 0.0.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "171c5f2df91fd2a4f9bed6c0d66084c5c7618aba8763842a5a38d7d6135f8926", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "171c5f2df91fd2a4f9bed6c0d66084c5c7618aba8763842a5a38d7d6135f8926", kill_on_drop: false }`
[INFO] [stdout] 171c5f2df91fd2a4f9bed6c0d66084c5c7618aba8763842a5a38d7d6135f8926