[INFO] fetching crate dynagrad 0.4.1...
[INFO] documenting dynagrad-0.4.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate dynagrad 0.4.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate dynagrad 0.4.1 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 dynagrad 0.4.1
[INFO] finished tweaking crates.io crate dynagrad 0.4.1
[INFO] tweaked toml for crates.io crate dynagrad 0.4.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate dynagrad 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-14/source/examples/simple.rs
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0efcdb45ac9797f85f8ac447d55a6cbe17cb604492db5d92651fea8718516a42
[INFO] running `Command { std: "docker" "start" "-a" "0efcdb45ac9797f85f8ac447d55a6cbe17cb604492db5d92651fea8718516a42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0efcdb45ac9797f85f8ac447d55a6cbe17cb604492db5d92651fea8718516a42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0efcdb45ac9797f85f8ac447d55a6cbe17cb604492db5d92651fea8718516a42", kill_on_drop: false }`
[INFO] [stdout] 0efcdb45ac9797f85f8ac447d55a6cbe17cb604492db5d92651fea8718516a42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] be14ef083488d3221ebbb7a28e104c59e72f59895ba8ca5317aa36add1a69a0e
[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" "be14ef083488d3221ebbb7a28e104c59e72f59895ba8ca5317aa36add1a69a0e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/examples/simple.rs
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling ndarray v0.12.1
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking either v1.5.2
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]     Checking gnuplot v0.0.32
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking dynagrad v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting dynagrad v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(weak_into_raw)]
[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 `dynagrad`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name dynagrad 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 --extern gnuplot=/opt/rustwide/target/debug/deps/libgnuplot-0d5f9e3144d30e50.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-f7dbd11a2149f3ea.rmeta --extern ndarray=/opt/rustwide/target/debug/deps/libndarray-06d572603586cad0.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-7a07008a1bbc3640.rmeta --cap-lints=warn --crate-version 0.4.1` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(weak_into_raw)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `as_raw` found for struct `std::rc::Weak<_>` in the current scope
[INFO] [stdout]   --> src/core.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |         (Weak::as_raw(&p) as usize).hash(state);
[INFO] [stdout]    |                ^^^^^^ function or associated item not found in `std::rc::Weak<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "be14ef083488d3221ebbb7a28e104c59e72f59895ba8ca5317aa36add1a69a0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be14ef083488d3221ebbb7a28e104c59e72f59895ba8ca5317aa36add1a69a0e", kill_on_drop: false }`
[INFO] [stdout] be14ef083488d3221ebbb7a28e104c59e72f59895ba8ca5317aa36add1a69a0e