[INFO] fetching crate bitmaptrie 2.0.0...
[INFO] documenting bitmaptrie-2.0.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate bitmaptrie 2.0.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate bitmaptrie 2.0.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bitmaptrie 2.0.0
[INFO] finished tweaking crates.io crate bitmaptrie 2.0.0
[INFO] tweaked toml for crates.io crate bitmaptrie 2.0.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 385c3a8fd5de82a69719adf12ff37f33a833ab7e7aa13ea26a1f9be1ac838fb5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "385c3a8fd5de82a69719adf12ff37f33a833ab7e7aa13ea26a1f9be1ac838fb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "385c3a8fd5de82a69719adf12ff37f33a833ab7e7aa13ea26a1f9be1ac838fb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "385c3a8fd5de82a69719adf12ff37f33a833ab7e7aa13ea26a1f9be1ac838fb5", kill_on_drop: false }`
[INFO] [stdout] 385c3a8fd5de82a69719adf12ff37f33a833ab7e7aa13ea26a1f9be1ac838fb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2ce6726364a852674c212d7e66a94a212dda2b9cc07d9da39bd7446d88947e72
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2ce6726364a852674c212d7e66a94a212dda2b9cc07d9da39bd7446d88947e72", kill_on_drop: false }`
[INFO] [stderr]  Documenting bitmaptrie v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `self::alloc::heap`
[INFO] [stdout]   --> src/comprawvec.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 | use self::alloc::heap::{allocate, reallocate, deallocate};
[INFO] [stdout]    |                  ^^^^ could not find `heap` in `alloc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:110:1
[INFO] [stdout]     |
[INFO] [stdout] 110 | #![feature(alloc)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:111:1
[INFO] [stdout]     |
[INFO] [stdout] 111 | #![feature(core_intrinsics)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:112:1
[INFO] [stdout]     |
[INFO] [stdout] 112 | #![feature(heap_api)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:113:1
[INFO] [stdout]     |
[INFO] [stdout] 113 | #![feature(unique)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `bitmaptrie`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name bitmaptrie src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 2.0.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "2ce6726364a852674c212d7e66a94a212dda2b9cc07d9da39bd7446d88947e72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ce6726364a852674c212d7e66a94a212dda2b9cc07d9da39bd7446d88947e72", kill_on_drop: false }`
[INFO] [stdout] 2ce6726364a852674c212d7e66a94a212dda2b9cc07d9da39bd7446d88947e72