[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 1.61.0 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 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/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" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7b7e307503ea98502d4ea30a8edb348bac91e989885bb5d036c25164164c6b69
[INFO] running `Command { std: "docker" "start" "-a" "7b7e307503ea98502d4ea30a8edb348bac91e989885bb5d036c25164164c6b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7b7e307503ea98502d4ea30a8edb348bac91e989885bb5d036c25164164c6b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b7e307503ea98502d4ea30a8edb348bac91e989885bb5d036c25164164c6b69", kill_on_drop: false }`
[INFO] [stdout] 7b7e307503ea98502d4ea30a8edb348bac91e989885bb5d036c25164164c6b69
[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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6da5f9fbd642f7dbeef08947209e7a034c1c45da1c974e5f3471323a5390da65
[INFO] running `Command { std: "docker" "start" "-a" "6da5f9fbd642f7dbeef08947209e7a034c1c45da1c974e5f3471323a5390da65", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Checking rust_prog_lang v0.1.0 (/opt/rustwide/workdir)
[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] [stderr]  Documenting rust_prog_lang v0.1.0 (/opt/rustwide/workdir)
[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: 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: 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: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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 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 -C metadata=5ea0dfb6e592f98c -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 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 -C metadata=0c5066798a676391 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=4633ccee73eae277 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 8_string_literal_slices src/bin/chap4/8_string_literal_slices.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=69c2c5f622e59221 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_vec_immut_ref src/bin/chap8/2_vec_immut_ref.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9fa3f71ef524a5a2 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=989db78e2eb94208 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_drop_samples src/bin/chap15/2_drop_samples.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=a52d0512b46b283a -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=21d5019cbb15f69b -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=e388c636ab28e955 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=ab80705eda1866e8 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=70aeb6598225ffc9 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=db4c2825bbf924a2 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_enum_sample src/bin/chap6/3_enum_sample.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=cbc418ec6b378219 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=1953c1a13230534d -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_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 -C metadata=5e3243e4bc6224fb -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=5d518654f040af05 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_rc_samples src/bin/chap15/3_rc_samples.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=91e44a712803d8f3 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_closure_samples src/bin/chap13/3_closure_samples.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f56cde3558eaaa2a -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=bd5db94562201277 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_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 -C metadata=d3b8eedc19f5f9e4 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=4c45f08d9818b0fa -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=fb564a01b0be1bae -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=fe99a63e235eefa9 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=6cb37070d1b04849 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_propagating_error src/bin/chap9/4_propagating_error.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=dbc1fa0110ec9473 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_mut_immut_references src/bin/chap4/5_mut_immut_references.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=591661faf18b8227 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=a4b3e3814df3042d -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=5ef8f319f801bc95 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_create_own_iter_samples src/bin/chap13/6_create_own_iter_samples.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bf2912e3d70242a8 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=068e57309977d5ce -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=1c888b7fd1efd0b7 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=ff688ee41a2f46f1 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=a9f6328d9d1e6d26 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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_result_recoverable_samples src/bin/chap9/2_result_recoverable_samples.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6cb06bbce3f13683 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=de169fa694c8f3ef -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=cb8872f9d7d7c4bd -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=878719ad9aa07e78 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=10e6d6d5b0851865 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=19acf1e01ac741b5 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=6e9732d77c868280 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=ef5df44f831cdea0 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.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 -C metadata=2582bfd1a0617363 -L dependency=/opt/rustwide/target/debug/deps --extern rust_prog_lang=/opt/rustwide/target/debug/deps/librust_prog_lang-33ef6cc93217e0f3.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "6da5f9fbd642f7dbeef08947209e7a034c1c45da1c974e5f3471323a5390da65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6da5f9fbd642f7dbeef08947209e7a034c1c45da1c974e5f3471323a5390da65", kill_on_drop: false }`
[INFO] [stdout] 6da5f9fbd642f7dbeef08947209e7a034c1c45da1c974e5f3471323a5390da65