[INFO] fetching crate zekin_data_structure 1.0.0...
[INFO] documenting zekin_data_structure-1.0.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate zekin_data_structure 1.0.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate zekin_data_structure 1.0.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zekin_data_structure 1.0.0
[INFO] finished tweaking crates.io crate zekin_data_structure 1.0.0
[INFO] tweaked toml for crates.io crate zekin_data_structure 1.0.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b91c14d76edbf23247708357bf003a140c67118a8980792ce1e4f139d7c4093
[INFO] running `Command { std: "docker" "start" "-a" "7b91c14d76edbf23247708357bf003a140c67118a8980792ce1e4f139d7c4093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b91c14d76edbf23247708357bf003a140c67118a8980792ce1e4f139d7c4093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b91c14d76edbf23247708357bf003a140c67118a8980792ce1e4f139d7c4093", kill_on_drop: false }`
[INFO] [stdout] 7b91c14d76edbf23247708357bf003a140c67118a8980792ce1e4f139d7c4093
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1259f4523c554c35a0847ed91b3906712a41a26f5203408329111d9c25127c2e
[INFO] running `Command { std: "docker" "start" "-a" "1259f4523c554c35a0847ed91b3906712a41a26f5203408329111d9c25127c2e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling wasm-bindgen v0.2.80
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.80
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.30
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.80
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.80
[INFO] [stderr]    Compiling getset v0.1.2
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.80
[INFO] [stderr]     Checking js-sys v0.3.57
[INFO] [stderr]     Checking console_error_panic_hook v0.1.7
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.30
[INFO] [stderr]     Checking wasm-bindgen-test v0.3.30
[INFO] [stderr]  Documenting zekin_data_structure v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(get_mut_unchecked)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `zekin_data_structure`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type cdylib --crate-type rlib --crate-name zekin_data_structure src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f4f13653c05b4d0f -L dependency=/opt/rustwide/target/debug/deps --extern float_cmp=/opt/rustwide/target/debug/deps/libfloat_cmp-a7e0f33ca25dcf34.rmeta --extern getset=/opt/rustwide/target/debug/deps/libgetset-d26ad4115c2810af.so --extern itertools=/opt/rustwide/target/debug/deps/libitertools-878b88b4202074c2.rmeta --extern js_sys=/opt/rustwide/target/debug/deps/libjs_sys-0731441526825d10.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-3913d27e4fd23b6c.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-6d5efcb1351b4036.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-6931cc0452dac942.rmeta --extern wasm_bindgen_test=/opt/rustwide/target/debug/deps/libwasm_bindgen_test-c1d826bff0a9fe43.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1259f4523c554c35a0847ed91b3906712a41a26f5203408329111d9c25127c2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1259f4523c554c35a0847ed91b3906712a41a26f5203408329111d9c25127c2e", kill_on_drop: false }`
[INFO] [stdout] 1259f4523c554c35a0847ed91b3906712a41a26f5203408329111d9c25127c2e