[INFO] cloning repository https://github.com/alszczep/japanese-words-generator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alszczep/japanese-words-generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falszczep%2Fjapanese-words-generator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falszczep%2Fjapanese-words-generator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4822ca25673e47ecee41c92510b7c4a7a3f9cac0
[INFO] documenting alszczep/japanese-words-generator against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falszczep%2Fjapanese-words-generator" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alszczep/japanese-words-generator on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-0-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/alszczep/japanese-words-generator
[INFO] finished tweaking git repo https://github.com/alszczep/japanese-words-generator
[INFO] tweaked toml for git repo https://github.com/alszczep/japanese-words-generator written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/alszczep/japanese-words-generator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3fd0a6c66c4e6a63f13655f638395e5031d3365c4d2cbbdc0858862dd719baa1
[INFO] running `Command { std: "docker" "start" "-a" "3fd0a6c66c4e6a63f13655f638395e5031d3365c4d2cbbdc0858862dd719baa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fd0a6c66c4e6a63f13655f638395e5031d3365c4d2cbbdc0858862dd719baa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fd0a6c66c4e6a63f13655f638395e5031d3365c4d2cbbdc0858862dd719baa1", kill_on_drop: false }`
[INFO] [stdout] 3fd0a6c66c4e6a63f13655f638395e5031d3365c4d2cbbdc0858862dd719baa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7603fe9c746895a2ada507fccc2d8ab36b52bdf5181f9eafee28daa01cd79ea4
[INFO] running `Command { std: "docker" "start" "-a" "7603fe9c746895a2ada507fccc2d8ab36b52bdf5181f9eafee28daa01cd79ea4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]     Checking linked-hash-map v0.5.6
[INFO] [stderr]     Checking ryu v1.0.12
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking directories v4.0.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.38
[INFO] [stderr]     Checking serde_yaml v0.8.26
[INFO] [stderr]     Checking confy v0.5.1
[INFO] [stderr]  Documenting japanese-words-generator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[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, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `japanese-words-generator`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type bin --crate-name japanese_words_generator src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=3c20d681ca27409f -L dependency=/opt/rustwide/target/debug/deps --extern confy=/opt/rustwide/target/debug/deps/libconfy-59e13a6da804360f.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-cdff42f96b188393.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-ba873f51150b2e59.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-e1af5d5f0fa8ac20.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-0a7ffa1c806eb960.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7603fe9c746895a2ada507fccc2d8ab36b52bdf5181f9eafee28daa01cd79ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7603fe9c746895a2ada507fccc2d8ab36b52bdf5181f9eafee28daa01cd79ea4", kill_on_drop: false }`
[INFO] [stdout] 7603fe9c746895a2ada507fccc2d8ab36b52bdf5181f9eafee28daa01cd79ea4
