[INFO] cloning repository https://github.com/supersylphMKV/rust_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/supersylphMKV/rust_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsupersylphMKV%2Frust_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsupersylphMKV%2Frust_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90624d6bdda31273c3df66871d0eb2ab9a07ff56
[INFO] documenting supersylphMKV/rust_learn against 1.64.0 for beta-1.65-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsupersylphMKV%2Frust_learn" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/supersylphMKV/rust_learn on toolchain 1.64.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.64.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/supersylphMKV/rust_learn
[INFO] finished tweaking git repo https://github.com/supersylphMKV/rust_learn
[INFO] tweaked toml for git repo https://github.com/supersylphMKV/rust_learn written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/supersylphMKV/rust_learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.64.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+1.64.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7085d146964a94ee8e84e31db2f7a4e3b820f118c6d7e39c508b262ae1164668
[INFO] running `Command { std: "docker" "start" "-a" "7085d146964a94ee8e84e31db2f7a4e3b820f118c6d7e39c508b262ae1164668", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7085d146964a94ee8e84e31db2f7a4e3b820f118c6d7e39c508b262ae1164668", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7085d146964a94ee8e84e31db2f7a4e3b820f118c6d7e39c508b262ae1164668", kill_on_drop: false }`
[INFO] [stdout] 7085d146964a94ee8e84e31db2f7a4e3b820f118c6d7e39c508b262ae1164668
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+1.64.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcc8426a48490f6412d1d1ba001eb5e7ee83dc4b783498c5e48bf0964402363e
[INFO] running `Command { std: "docker" "start" "-a" "dcc8426a48490f6412d1d1ba001eb5e7ee83dc4b783498c5e48bf0964402363e", kill_on_drop: false }`
[INFO] [stderr]  Documenting step_1_4 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_4_cow)
[INFO] [stderr]  Documenting step_1_3 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_3_rc_cell)
[INFO] [stderr]  Documenting step_3_2 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_2_macro)
[INFO] [stderr]  Documenting step_3_12 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_12_web_db)
[INFO] [stderr]  Documenting step_3_11 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_11_async)
[INFO] [stderr]  Documenting step_2_1 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_1_type_safety)
[INFO] [stderr]  Documenting step_1_7 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_7_sized)
[INFO] [stderr]  Documenting step_1 v0.1.0 (/opt/rustwide/workdir/1_concepts)
[INFO] [stderr]  Documenting step_2 v0.1.0 (/opt/rustwide/workdir/2_idioms)
[INFO] [stderr]  Documenting step_1_5 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_5_convert_cast_deref)
[INFO] [stderr]  Documenting step_1_8 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_8_thread_safety)
[INFO] [stderr]  Documenting step_3_10 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_10_threads)
[INFO] [stderr]  Documenting step_2_2 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_2_mem_replace)
[INFO] [stderr]  Documenting step_3_9 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_9_cmd_env_conf)
[INFO] [stderr]  Documenting step_1_9 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_9_phantom)
[INFO] [stderr]  Documenting step_3_1 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_1_testing)
[INFO] [stderr] error: could not document `step_1_4`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_1_4 1_concepts/1_4_cow/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=c7b4530a18c93a84 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not document `step_2_1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_2_1 2_idioms/2_1_type_safety/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=16772b809bec47b6 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "dcc8426a48490f6412d1d1ba001eb5e7ee83dc4b783498c5e48bf0964402363e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcc8426a48490f6412d1d1ba001eb5e7ee83dc4b783498c5e48bf0964402363e", kill_on_drop: false }`
[INFO] [stdout] dcc8426a48490f6412d1d1ba001eb5e7ee83dc4b783498c5e48bf0964402363e