[INFO] fetching crate haru 0.29.5...
[INFO] documenting haru-0.29.5 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate haru 0.29.5 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate haru 0.29.5 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 haru 0.29.5
[INFO] finished tweaking crates.io crate haru 0.29.5
[INFO] tweaked toml for crates.io crate haru 0.29.5 written to /workspace/builds/worker-5/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded haru-decorator v0.21.0
[INFO] [stderr]   Downloaded libffi-sys v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 6f1e1186307dd4fb295c811d6c862cd1105ea3175e36836f180f7a76ac7fe742
[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" "6f1e1186307dd4fb295c811d6c862cd1105ea3175e36836f180f7a76ac7fe742", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f1e1186307dd4fb295c811d6c862cd1105ea3175e36836f180f7a76ac7fe742", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f1e1186307dd4fb295c811d6c862cd1105ea3175e36836f180f7a76ac7fe742", kill_on_drop: false }`
[INFO] [stdout] 6f1e1186307dd4fb295c811d6c862cd1105ea3175e36836f180f7a76ac7fe742
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5385f633057c6fabea6cce67dee2ec812d70907c116cbc9fff70f14af708766c
[INFO] running `Command { std: "docker" "start" "-a" "5385f633057c6fabea6cce67dee2ec812d70907c116cbc9fff70f14af708766c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking hashbrown v0.4.0
[INFO] [stderr]    Compiling peg v0.5.7
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling haru-decorator v0.21.0
[INFO] [stderr]     Checking rustyline v4.1.0
[INFO] [stderr]    Compiling haru v0.29.5 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting haru v0.29.5 (/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(vec_remove_item)]
[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:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(alloc_layout_extra)]
[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:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(ptr_offset_from)]
[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:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(core_intrinsics)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 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 `haru`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name haru src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern ansi_term=/opt/rustwide/target/debug/deps/libansi_term-2b8e18b803626c5c.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-b31c81520e08f43a.rmeta --extern decorator=/opt/rustwide/target/debug/deps/libdecorator-812b4b7e080f69cb.so --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-f19a55fe67e7b434.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-b01e5f49cd1b74e8.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-c56fa8ba555cac9b.so --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-b5dbcc2daa2e7df6.rmeta --extern rustyline=/opt/rustwide/target/debug/deps/librustyline-58bff9ef471989e6.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-f1af86579b1650db.rmeta --cap-lints=warn --crate-version 0.29.5` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "5385f633057c6fabea6cce67dee2ec812d70907c116cbc9fff70f14af708766c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5385f633057c6fabea6cce67dee2ec812d70907c116cbc9fff70f14af708766c", kill_on_drop: false }`
[INFO] [stdout] 5385f633057c6fabea6cce67dee2ec812d70907c116cbc9fff70f14af708766c