[INFO] fetching crate polymorph-allocator 1.2.0...
[INFO] documenting polymorph-allocator-1.2.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate polymorph-allocator 1.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate polymorph-allocator 1.2.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polymorph-allocator 1.2.0
[INFO] finished tweaking crates.io crate polymorph-allocator 1.2.0
[INFO] tweaked toml for crates.io crate polymorph-allocator 1.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cee776706c8f3d256fd97a4e93b3ef08dcdabc377f30bb73dd65a30d958d6b8e
[INFO] running `Command { std: "docker" "start" "-a" "cee776706c8f3d256fd97a4e93b3ef08dcdabc377f30bb73dd65a30d958d6b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cee776706c8f3d256fd97a4e93b3ef08dcdabc377f30bb73dd65a30d958d6b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cee776706c8f3d256fd97a4e93b3ef08dcdabc377f30bb73dd65a30d958d6b8e", kill_on_drop: false }`
[INFO] [stdout] cee776706c8f3d256fd97a4e93b3ef08dcdabc377f30bb73dd65a30d958d6b8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b7c43756f5e345a3c4ce79f8042985456f13bd0dca30a9f62c2958f9f9ba168
[INFO] running `Command { std: "docker" "start" "-a" "2b7c43756f5e345a3c4ce79f8042985456f13bd0dca30a9f62c2958f9f9ba168", kill_on_drop: false }`
[INFO] [stderr]  Documenting polymorph-allocator v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(const_fn)]
[INFO] [stdout]   |            ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[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 E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `polymorph-allocator`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type lib --crate-name polymorph_allocator src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4ad3e6637bae2ef1 -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-c0bd97bdb7c1fbd1.rmeta --extern spin=/opt/rustwide/target/debug/deps/libspin-49697cc1536a8d2b.rmeta --cap-lints=warn --crate-version 1.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2b7c43756f5e345a3c4ce79f8042985456f13bd0dca30a9f62c2958f9f9ba168", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b7c43756f5e345a3c4ce79f8042985456f13bd0dca30a9f62c2958f9f9ba168", kill_on_drop: false }`
[INFO] [stdout] 2b7c43756f5e345a3c4ce79f8042985456f13bd0dca30a9f62c2958f9f9ba168
