[INFO] cloning repository https://github.com/tokiwadai/rust_prog_lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tokiwadai/rust_prog_lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftokiwadai%2Frust_prog_lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftokiwadai%2Frust_prog_lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 34d19f5d2570b49f3aac99664021021050edada3
[INFO] documenting tokiwadai/rust_prog_lang against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftokiwadai%2Frust_prog_lang" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tokiwadai/rust_prog_lang 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 git repo https://github.com/tokiwadai/rust_prog_lang
[INFO] finished tweaking git repo https://github.com/tokiwadai/rust_prog_lang
[INFO] tweaked toml for git repo https://github.com/tokiwadai/rust_prog_lang written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/tokiwadai/rust_prog_lang already has a lockfile, it will not be regenerated
[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-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] ab7db96152ecbf3262c435ee8c06fcf6f67994247de8756930dfa1f41beb1f96
[INFO] running `Command { std: "docker" "start" "-a" "ab7db96152ecbf3262c435ee8c06fcf6f67994247de8756930dfa1f41beb1f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab7db96152ecbf3262c435ee8c06fcf6f67994247de8756930dfa1f41beb1f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab7db96152ecbf3262c435ee8c06fcf6f67994247de8756930dfa1f41beb1f96", kill_on_drop: false }`
[INFO] [stdout] ab7db96152ecbf3262c435ee8c06fcf6f67994247de8756930dfa1f41beb1f96
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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] 04806cd41b6129c886307b2dc702904786dcd11d057920bb8f37512ffa7d1c18
[INFO] running `Command { std: "docker" "start" "-a" "04806cd41b6129c886307b2dc702904786dcd11d057920bb8f37512ffa7d1c18", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_prog_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting rust_prog_lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `order1`
[INFO] [stdout]   --> src/lib.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let order1 = back_of_house::Appetizer::Soup;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order2`
[INFO] [stdout]   --> src/lib.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let order2 = back_of_house::Appetizer::Salad;
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_order2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `serve_order`
[INFO] [stdout]   --> src/lib.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn serve_order() {}
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `seat_at_table`
[INFO] [stdout]  --> src/front_of_house/hosting.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn seat_at_table() {}
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `take_order`
[INFO] [stdout]  --> src/front_of_house.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn take_order() {}
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `serve_order`
[INFO] [stdout]  --> src/front_of_house.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn serve_order() {}
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `take_payment`
[INFO] [stdout]  --> src/front_of_house.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn take_payment() {}
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `seasonal_fruit`
[INFO] [stdout]   --> src/lib.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |         seasonal_fruit: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `cook_order`
[INFO] [stdout]   --> src/lib.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 |     fn cook_order() {}
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `fix_incorrect_order`
[INFO] [stdout]   --> src/lib.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn fix_incorrect_order() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_vec_sample src/bin/chap8/1_vec_sample.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=8bbe89ba4e5c9c7f -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --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 `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 4_string_samples src/bin/chap8/4_string_samples.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=590f674d40f0bb92 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 2_trait_samples src/bin/chap10/2_trait_samples.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=d33c20696e7c6df1 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_variable_scope src/bin/chap4/1_variable_scope.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=0b7d926e056d426f -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 5_rc_refcell_samples src/bin/chap15/5_rc_refcell_samples.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=4ab1018eb6e355b6 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 3_variable_ownership src/bin/chap4/3_variable_ownership.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=4fa0771de5cc9e15 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_panic_samples src/bin/chap9/1_panic_samples.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=ee152331c513d97c -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stdout] warning: type `List_Box` should have an upper camel case name
[INFO] [stdout]  --> src/bin/chap15/3_rc_samples.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum List_Box {
[INFO] [stdout]   |      ^^^^^^^^ help: convert the identifier to upper camel case: `ListBox`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 6_mutex_samples src/bin/chap16/6_mutex_samples.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=043f80fcf200fa4c -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_generic_samples src/bin/chap10/1_generic_samples.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=5427da7d9478efd0 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 6_ref_cycle_samples src/bin/chap15/6_ref_cycle_samples.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=c1a33755cf93448a -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 4_iterator_samples src/bin/chap13/4_iterator_samples.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=7b4cc79de63b5455 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_enum_sample src/bin/chap6/1_enum_sample.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=a0180b8d34f479f0 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 3_vec_iter src/bin/chap8/3_vec_iter.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=51115f69c2b190d5 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 5_closure_iter_samples src/bin/chap13/5_closure_iter_samples.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=a52cff1d49a57ee3 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 7_rc_weak_samples src/bin/chap15/7_rc_weak_samples.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=20a9eb62be23fe4a -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 6_lifetime_generic_samples src/bin/chap10/6_lifetime_generic_samples.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=555d4acf05cf3aa6 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 7_string_slices src/bin/chap4/7_string_slices.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=c6e4f0e9632d07df -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_struct_sample src/bin/chap5/1_struct_sample.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=d809c0c3cf6e26f6 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 2_struct_rect_sample src/bin/chap5/2_struct_rect_sample.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=2fe824b1c8795b0c -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_test_samples src/bin/chap11/1_test_samples.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=be50e3b674dd8f52 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 5_channel_thread_samples src/bin/chap16/5_channel_thread_samples.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=6f482f3eb595197c -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 2_thread_samples src/bin/chap16/2_thread_samples.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=7f86f3bca6e37bcf -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 5_enum_option src/bin/chap6/5_enum_option.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=b04ba063ba432c36 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 4_reference_borrowing src/bin/chap4/4_reference_borrowing.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=6460895c61df5696 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 3_generic_trait_samples src/bin/chap10/3_generic_trait_samples.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=aee5079861243523 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 5_hashmap_samples src/bin/chap8/5_hashmap_samples.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=34cd20797a5c0202 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 2_variable_move src/bin/chap4/2_variable_move.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=b6f4654475e94c35 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 6_dangle_reference src/bin/chap4/6_dangle_reference.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=abe5c4589b1b397b -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name test2 src/bin/test2.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=d90810af63186bce -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 3_thread_samples src/bin/chap16/3_thread_samples.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=36eae683d1ebd5da -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 2_closure_samples src/bin/chap13/2_closure_samples.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=5d8ae871f129760d -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_thread_samples src/bin/chap16/1_thread_samples.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=3123f459f4861df1 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 3_result_matching_samples src/bin/chap9/3_result_matching_samples.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=b88fd355b62727d5 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_box_samples src/bin/chap15/1_box_samples.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=7ff25c3175fa784d -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 1_closure_samples src/bin/chap13/1_closure_samples.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=2483238e951ef38b -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 4_generic_trait_samples src/bin/chap10/4_generic_trait_samples.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=5772b9ba31199f4e -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 6_enum_if_let src/bin/chap6/6_enum_if_let.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=455efab993fc9094 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 2_enum_sample src/bin/chap6/2_enum_sample.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=a4f70abe9c9bb58f -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name test src/bin/test.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=d20dc6ab82eb71ac -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 4_refcell_samples src/bin/chap15/4_refcell_samples.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=2f89944d2a53d453 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rust_prog_lang`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name 4_enum_sample src/bin/chap6/4_enum_sample.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=547906c4c9e77677 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-9538f7fedc720664.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "04806cd41b6129c886307b2dc702904786dcd11d057920bb8f37512ffa7d1c18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04806cd41b6129c886307b2dc702904786dcd11d057920bb8f37512ffa7d1c18", kill_on_drop: false }`
[INFO] [stdout] 04806cd41b6129c886307b2dc702904786dcd11d057920bb8f37512ffa7d1c18