[INFO] fetching crate diff_fmt 0.1.0...
[INFO] documenting diff_fmt-0.1.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate diff_fmt 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate diff_fmt 0.1.0 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate diff_fmt 0.1.0
[INFO] finished tweaking crates.io crate diff_fmt 0.1.0
[INFO] tweaked toml for crates.io crate diff_fmt 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redox_termios v0.1.3
[INFO] [stderr]   Downloaded termion v1.5.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 676cb638256c74c3b2090a1c18195dbc18078ee16d717ab2a3ab1d5f13574b61
[INFO] running `Command { std: "docker" "start" "-a" "676cb638256c74c3b2090a1c18195dbc18078ee16d717ab2a3ab1d5f13574b61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "676cb638256c74c3b2090a1c18195dbc18078ee16d717ab2a3ab1d5f13574b61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "676cb638256c74c3b2090a1c18195dbc18078ee16d717ab2a3ab1d5f13574b61", kill_on_drop: false }`
[INFO] [stdout] 676cb638256c74c3b2090a1c18195dbc18078ee16d717ab2a3ab1d5f13574b61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 740fa495c2bf4ee5d286ddba978722f8f1953381d192aade3124c92faad3c5d5
[INFO] running `Command { std: "docker" "start" "-a" "740fa495c2bf4ee5d286ddba978722f8f1953381d192aade3124c92faad3c5d5", kill_on_drop: false }`
[INFO] [stderr]     Checking numtoa v0.1.0
[INFO] [stderr]     Checking termion v1.5.6
[INFO] [stderr]  Documenting diff_fmt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `rt` in `fmt`
[INFO] [stdout]   --> src/lib.rs:38:44
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn clone_args(f: &Formatter) -> [std::fmt::rt::v1::Argument; 1] {
[INFO] [stdout]    |                                            ^^ could not find `rt` in `fmt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:39:19
[INFO] [stdout]    |
[INFO] [stdout] 39 |     [::core::fmt::rt::v1::Argument {
[INFO] [stdout]    |                   ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:40:32
[INFO] [stdout]    |
[INFO] [stdout] 40 |         position: ::core::fmt::rt::v1::Position::At(0usize),
[INFO] [stdout]    |                                ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:41:30
[INFO] [stdout]    |
[INFO] [stdout] 41 |         format: ::core::fmt::rt::v1::FormatSpec {
[INFO] [stdout]    |                              ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:45:53
[INFO] [stdout]    |
[INFO] [stdout] 45 |                     Alignment::Left => ::core::fmt::rt::v1::Alignment::Left,
[INFO] [stdout]    |                                                     ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:46:54
[INFO] [stdout]    |
[INFO] [stdout] 46 |                     Alignment::Right => ::core::fmt::rt::v1::Alignment::Right,
[INFO] [stdout]    |                                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:47:55
[INFO] [stdout]    |
[INFO] [stdout] 47 |                     Alignment::Center => ::core::fmt::rt::v1::Alignment::Center,
[INFO] [stdout]    |                                                       ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:49:38
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 None => ::core::fmt::rt::v1::Alignment::Unknown
[INFO] [stdout]    |                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:53:41
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 Some(p) => ::core::fmt::rt::v1::Count::Is(p),
[INFO] [stdout]    |                                         ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:54:38
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 None => ::core::fmt::rt::v1::Count::Implied,
[INFO] [stdout]    |                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:57:41
[INFO] [stdout]    |
[INFO] [stdout] 57 |                 Some(w) => ::core::fmt::rt::v1::Count::Is(w),
[INFO] [stdout]    |                                         ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `rt` is private
[INFO] [stdout]   --> src/lib.rs:58:38
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 None => ::core::fmt::rt::v1::Count::Implied,
[INFO] [stdout]    |                                      ^^ private module
[INFO] [stdout]    |
[INFO] [stdout] note: the module `rt` is defined here
[INFO] [stdout]   --> /rustc/82e1608dfa6e0b5569232559e3d385fea5a93112/library/core/src/fmt/mod.rs:21:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(prelude_import)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(print_internals)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![feature(fmt_internals)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `prelude_import` is internal to the compiler or standard library
[INFO] [stdout]   --> src/lib.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(prelude_import)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: using it is strongly discouraged
[INFO] [stdout]    = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 15 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0554, E0603.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `diff_fmt`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type lib --crate-name diff_fmt src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=2b20f30ca35522c3 -L dependency=/opt/rustwide/target/debug/deps --extern termion=/opt/rustwide/target/debug/deps/libtermion-da764bfee009837d.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "740fa495c2bf4ee5d286ddba978722f8f1953381d192aade3124c92faad3c5d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "740fa495c2bf4ee5d286ddba978722f8f1953381d192aade3124c92faad3c5d5", kill_on_drop: false }`
[INFO] [stdout] 740fa495c2bf4ee5d286ddba978722f8f1953381d192aade3124c92faad3c5d5
