[INFO] cloning repository https://github.com/jiqiang/rustbyexample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jiqiang/rustbyexample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiqiang%2Frustbyexample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjiqiang%2Frustbyexample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 98538804fe40f9c9945fd7f8f27ff8f718c2a973
[INFO] documenting jiqiang/rustbyexample 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%2Fjiqiang%2Frustbyexample" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jiqiang/rustbyexample 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/jiqiang/rustbyexample
[INFO] finished tweaking git repo https://github.com/jiqiang/rustbyexample
[INFO] tweaked toml for git repo https://github.com/jiqiang/rustbyexample written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/jiqiang/rustbyexample 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] [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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] c050a38952275d11de26b6305a8ace085fe6d41613152001a6e9452561b69a91
[INFO] running `Command { std: "docker" "start" "-a" "c050a38952275d11de26b6305a8ace085fe6d41613152001a6e9452561b69a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c050a38952275d11de26b6305a8ace085fe6d41613152001a6e9452561b69a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c050a38952275d11de26b6305a8ace085fe6d41613152001a6e9452561b69a91", kill_on_drop: false }`
[INFO] [stdout] c050a38952275d11de26b6305a8ace085fe6d41613152001a6e9452561b69a91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 86ac87b7e8536502554059ee25b768d4000f6488b35b05db5ff3774caf57d9f2
[INFO] running `Command { std: "docker" "start" "-a" "86ac87b7e8536502554059ee25b768d4000f6488b35b05db5ff3774caf57d9f2", kill_on_drop: false }`
[INFO] [stderr]  Documenting rustbyexample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rustbyexample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:113:16
[INFO] [stdout]     |
[INFO] [stdout] 113 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 113 - type Job = Box<FnBox + Send + 'static>;
[INFO] [stdout] 113 + type Job = Box<dyn FnBox + Send + 'static>;
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]  --> src/bin/match.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |         n @ 1...12 => println!("{} is between 1 and 12", n),
[INFO] [stdout]   |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]  --> src/bin/match.rs:9:15
[INFO] [stdout]   |
[INFO] [stdout] 9 |         n @ 13...19 => println!("{} is between 13 and 19", n),
[INFO] [stdout]   |               ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name enum_linked_list src/bin/enum_linked_list.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=099d0c7f3c11fd13 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.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 `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name iteration src/bin/iteration.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=ac8e481f87e13aba -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name closures_type_anonymity src/bin/closures_type_anonymity.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=cafd18803c72291a -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name enum_c_like src/bin/enum_c_like.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=01039f5e03f9f8ba -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name closures_iterator_any src/bin/closures_iterator_any.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=9814862399cdae24 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name match src/bin/match.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=fb731d1b0e98c9c4 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name closures src/bin/closures.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=f1af7eeec2295ac7 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name collections src/bin/collections.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=d199e03459630ab4 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name reference src/bin/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=0470aa90eb3002db -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name binary_search src/bin/binary_search.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=50da5d43c1a07637 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name enum src/bin/enum.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=d31291c47552521b -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name mutability src/bin/mutability.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=cc6f10a00cf63011 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name blog src/bin/blog.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=24241c234a104874 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name declare_first src/bin/declare_first.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=b7023833b53bbfdb -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name web_server src/bin/web_server.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=1b2530f86a03bf91 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name minigrep src/bin/minigrep.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=11bac64f566083ae -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name traits src/bin/traits.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=96ebe7f04fae0a55 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name formatted_print src/bin/formatted_print.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=f971c5a8c4a39820 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name constants src/bin/constants.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=ae0cba62a4e233f5 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name gui src/bin/gui.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=68253dd28fcc39ae -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name generic src/bin/generic.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=070dc69f5353bbf3 -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `rustbyexample`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name boxes src/bin/boxes.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=c0204135e5f7afab -L dependency=/opt/rustwide/target/debug/deps --extern rustbyexample=/opt/rustwide/target/debug/deps/librustbyexample-5a1a6ff5ec15456f.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "86ac87b7e8536502554059ee25b768d4000f6488b35b05db5ff3774caf57d9f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86ac87b7e8536502554059ee25b768d4000f6488b35b05db5ff3774caf57d9f2", kill_on_drop: false }`
[INFO] [stdout] 86ac87b7e8536502554059ee25b768d4000f6488b35b05db5ff3774caf57d9f2