[INFO] fetching crate umm-malloc 0.3.1...
[INFO] documenting umm-malloc-0.3.1 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate umm-malloc 0.3.1 into /workspace/builds/worker-24/source
[INFO] validating manifest of crates.io crate umm-malloc 0.3.1 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 umm-malloc 0.3.1
[INFO] finished tweaking crates.io crate umm-malloc 0.3.1
[INFO] tweaked toml for crates.io crate umm-malloc 0.3.1 written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate crates.io crate umm-malloc 0.3.1 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cortex-m-rt-macros v0.7.0
[INFO] [stderr]   Downloaded umm-malloc-sys v0.3.1
[INFO] [stderr]   Downloaded cortex-m-rt v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] [stdout] bf69f593c4419b5c38f6d54266f20eb2955ffa83eb362c6681927db67b83d034
[INFO] running `Command { std: "docker" "start" "-a" "bf69f593c4419b5c38f6d54266f20eb2955ffa83eb362c6681927db67b83d034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf69f593c4419b5c38f6d54266f20eb2955ffa83eb362c6681927db67b83d034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf69f593c4419b5c38f6d54266f20eb2955ffa83eb362c6681927db67b83d034", kill_on_drop: false }`
[INFO] [stdout] bf69f593c4419b5c38f6d54266f20eb2955ffa83eb362c6681927db67b83d034
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] [stdout] d286bb02225e76494509ddb8318942ff9c179ab34d18010a5d074263a9d68316
[INFO] running `Command { std: "docker" "start" "-a" "d286bb02225e76494509ddb8318942ff9c179ab34d18010a5d074263a9d68316", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling umm-malloc-sys v0.3.1
[INFO] [stderr]  Documenting umm-malloc v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: A critical section cargo feature must be enabled
[INFO] [stdout]    --> src/lib.rs:129:1
[INFO] [stdout]     |
[INFO] [stdout] 129 | compile_error!("A critical section cargo feature must be enabled");
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `umm-malloc`
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name umm_malloc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=07a4f82a1d8187aa -L dependency=/opt/rustwide/target/debug/deps --extern umm_malloc_sys=/opt/rustwide/target/debug/deps/libumm_malloc_sys-93c9a42202597a03.rmeta --cap-lints=warn --crate-version 0.3.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d286bb02225e76494509ddb8318942ff9c179ab34d18010a5d074263a9d68316", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d286bb02225e76494509ddb8318942ff9c179ab34d18010a5d074263a9d68316", kill_on_drop: false }`
[INFO] [stdout] d286bb02225e76494509ddb8318942ff9c179ab34d18010a5d074263a9d68316