[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 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FsupersylphMKV%2Frust_learn" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/supersylphMKV/rust_learn on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-11/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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6dbbd7d84ee8de08e350301d7e5dcf02ae72b2c297bb777a179c6fca2a110251
[INFO] running `Command { std: "docker" "start" "-a" "6dbbd7d84ee8de08e350301d7e5dcf02ae72b2c297bb777a179c6fca2a110251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6dbbd7d84ee8de08e350301d7e5dcf02ae72b2c297bb777a179c6fca2a110251", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dbbd7d84ee8de08e350301d7e5dcf02ae72b2c297bb777a179c6fca2a110251", kill_on_drop: false }`
[INFO] [stdout] 6dbbd7d84ee8de08e350301d7e5dcf02ae72b2c297bb777a179c6fca2a110251
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdf6ec8a62c6797ee7b910de212d96b1b1d7297981b5c52a01572f9f0b372bdd
[INFO] running `Command { std: "docker" "start" "-a" "fdf6ec8a62c6797ee7b910de212d96b1b1d7297981b5c52a01572f9f0b372bdd", kill_on_drop: false }`
[INFO] [stderr]  Documenting step_3_6 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_6_serde)
[INFO] [stderr]  Documenting step_2_1 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_1_type_safety)
[INFO] [stderr]  Documenting step_2 v0.1.0 (/opt/rustwide/workdir/2_idioms)
[INFO] [stderr]  Documenting step_1_6 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_6_dispatch)
[INFO] [stderr]  Documenting step_2_3 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_3_bound_impl)
[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_3_9 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_9_cmd_env_conf)
[INFO] [stderr]  Documenting step_1_7 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_7_sized)
[INFO] [stderr]  Documenting step_3_11 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_11_async)
[INFO] [stderr]  Documenting step_3_8 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_8_log)
[INFO] [stderr]  Documenting step_3_7 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_7_rand_crypto)
[INFO] [stderr]  Documenting step_3_5 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_5_collections)
[INFO] [stderr]  Documenting step_1_5 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_5_convert_cast_deref)
[INFO] [stderr]  Documenting step_3_1 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_1_testing)
[INFO] [stderr]  Documenting step_1_3 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_3_rc_cell)
[INFO] [stderr]  Documenting step_3_4 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_4_regex_parsing)
[INFO] [stderr]  Documenting step_3_3 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_3_date_time)
[INFO] [stderr]  Documenting step_3_2 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_2_macro)
[INFO] [stderr]  Documenting step_2_4 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_4_generic_in_type_out)
[INFO] [stderr]  Documenting step_3_12 v0.1.0 (/opt/rustwide/workdir/3_ecosystem/3_12_web_db)
[INFO] [stderr]  Documenting step_3 v0.1.0 (/opt/rustwide/workdir/3_ecosystem)
[INFO] [stderr]  Documenting step_1_4 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_4_cow)
[INFO] [stderr]  Documenting step_1_9 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_9_phantom)
[INFO] [stderr]  Documenting step_1_2 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_2_box_pin)
[INFO] [stderr]  Documenting step_1_1 v0.1.0 (/opt/rustwide/workdir/1_concepts/1_1_default_clone_copy)
[INFO] [stderr]  Documenting step_1 v0.1.0 (/opt/rustwide/workdir/1_concepts)
[INFO] [stderr]  Documenting step_2_2 v0.1.0 (/opt/rustwide/workdir/2_idioms/2_2_mem_replace)
[INFO] [stderr] error: could not document `step_3_11`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_11 3_ecosystem/3_11_async/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=fc5d1d8f5af39874 -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`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_2 2_idioms/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c7aaa76549f85b35 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_1_8`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_1_8 1_concepts/1_8_thread_safety/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=3c2f6e4f1d4b452d -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_3_9`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_9 3_ecosystem/3_9_cmd_env_conf/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=973e1413587d0408 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_1_3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_1_3 1_concepts/1_3_rc_cell/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=cb879412d7fa2113 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_3_2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_2 3_ecosystem/3_2_macro/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9f3928eaa9f3123b -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_2_3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_2_3 2_idioms/2_3_bound_impl/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=20883eb94322cff2 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_3_7`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_7 3_ecosystem/3_7_rand_crypto/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=0a964b97eb5f6175 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_3_5`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_5 3_ecosystem/3_5_collections/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9329bca78c0e12b0 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_3_1`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_1 3_ecosystem/3_1_testing/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=28211738a5a08cc6 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_3_3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_3 3_ecosystem/3_3_date_time/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1c80152105b0cfcd -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_1_5`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_1_5 1_concepts/1_5_convert_cast_deref/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4feab50738e4a2d9 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_2_2`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_2_2 2_idioms/2_2_mem_replace/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f09d77b4db9c1ee6 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_1_7`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_1_7 1_concepts/1_7_sized/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e927ffa2eaead619 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_3_8`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_3_8 3_ecosystem/3_8_log/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=fa857545d6be4034 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_1_9`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_1_9 1_concepts/1_9_phantom/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f7a6d6b4e53786e7 -L dependency=/opt/rustwide/target/debug/deps --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `step_2_4`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name step_2_4 2_idioms/2_4_generic_in_type_out/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bcea69b9643e86fc -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" "fdf6ec8a62c6797ee7b910de212d96b1b1d7297981b5c52a01572f9f0b372bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf6ec8a62c6797ee7b910de212d96b1b1d7297981b5c52a01572f9f0b372bdd", kill_on_drop: false }`
[INFO] [stdout] fdf6ec8a62c6797ee7b910de212d96b1b1d7297981b5c52a01572f9f0b372bdd