[INFO] fetching crate ast2str-derive 0.4.1...
[INFO] documenting ast2str-derive-0.4.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate ast2str-derive 0.4.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate ast2str-derive 0.4.1 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ast2str-derive 0.4.1
[INFO] finished tweaking crates.io crate ast2str-derive 0.4.1
[INFO] tweaked toml for crates.io crate ast2str-derive 0.4.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80b20bbf14272d7292a59f1d92750c34c4cb454a0744db219ec239bff32c81d2
[INFO] running `Command { std: "docker" "start" "-a" "80b20bbf14272d7292a59f1d92750c34c4cb454a0744db219ec239bff32c81d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80b20bbf14272d7292a59f1d92750c34c4cb454a0744db219ec239bff32c81d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80b20bbf14272d7292a59f1d92750c34c4cb454a0744db219ec239bff32c81d2", kill_on_drop: false }`
[INFO] [stdout] 80b20bbf14272d7292a59f1d92750c34c4cb454a0744db219ec239bff32c81d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 595c01f101d3e76c847780f1ff3065fcadd7d7f775f58ca6686ba138fd0bc478
[INFO] running `Command { std: "docker" "start" "-a" "595c01f101d3e76c847780f1ff3065fcadd7d7f775f58ca6686ba138fd0bc478", kill_on_drop: false }`
[INFO] [stderr]  Documenting ast2str-derive v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder`
[INFO] [stdout]   --> src/gen.rs:13:62
[INFO] [stdout]    |
[INFO] [stdout] 13 | /// The possible field attributes that get translated into [`TreeBuilder`] methods.
[INFO] [stdout]    |                                                              ^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout]    = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder::field`
[INFO] [stdout]   --> src/gen.rs:17:52
[INFO] [stdout]    |
[INFO] [stdout] 17 |     /// No configuration supplied. Translates to [`TreeBuilder::field`].
[INFO] [stdout]    |                                                    ^^^^^^^^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder::quoted`
[INFO] [stdout]   --> src/gen.rs:29:63
[INFO] [stdout]    |
[INFO] [stdout] 29 |     /// Wraps the field name with backtickts. Translates to [`TreeBuilder::quoted`].
[INFO] [stdout]    |                                                               ^^^^^^^^^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder::display`
[INFO] [stdout]   --> src/gen.rs:32:72
[INFO] [stdout]    |
[INFO] [stdout] 32 |     /// Formats the field using [`std::fmt::Display`]. Translates to [`TreeBuilder::display`].
[INFO] [stdout]    |                                                                        ^^^^^^^^^^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder::debug`
[INFO] [stdout]   --> src/gen.rs:35:70
[INFO] [stdout]    |
[INFO] [stdout] 35 |     /// Formats the field using [`std::fmt::Debug`]. Translates to [`TreeBuilder::debug`].
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder::display`
[INFO] [stdout]   --> src/gen.rs:38:69
[INFO] [stdout]    |
[INFO] [stdout] 38 |     /// Formats the field using the given callback. Translates to [`TreeBuilder::display`].
[INFO] [stdout]    |                                                                     ^^^^^^^^^^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder`
[INFO] [stdout]   --> src/gen.rs:52:21
[INFO] [stdout]    |
[INFO] [stdout] 52 | /// Generates the [`TreeBuilder`] methods needed to stringify the fields.
[INFO] [stdout]    |                     ^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `TreeBuilder`
[INFO] [stdout]    --> src/gen.rs:193:63
[INFO] [stdout]     |
[INFO] [stdout] 193 | /// Collects the field annotations required to generate the [`TreeBuilder`] API calls.
[INFO] [stdout]     |                                                               ^^^^^^^^^^^ no item named `TreeBuilder` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this URL is not a hyperlink
[INFO] [stdout]    --> src/lib.rs:174:49
[INFO] [stdout]     |
[INFO] [stdout] 174 | ...as adapted from snafu (https://github.com/shepmaster/snafu/blob/main/snafu-derive/src/lib.rs#L1126) by Jake Goulding.
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use an automatic link instead: `<https://github.com/shepmaster/snafu/blob/main/snafu-derive/src/lib.rs#L1126>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: bare URLs are not automatically turned into clickable links
[INFO] [stdout]     = note: `#[warn(rustdoc::bare_urls)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ast2str-derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name ast2str_derive src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bfda3f63776d451d -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-b4428f0723261f03.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-25938768891e3290.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-72effca52e7ddeb7.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.4.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "595c01f101d3e76c847780f1ff3065fcadd7d7f775f58ca6686ba138fd0bc478", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "595c01f101d3e76c847780f1ff3065fcadd7d7f775f58ca6686ba138fd0bc478", kill_on_drop: false }`
[INFO] [stdout] 595c01f101d3e76c847780f1ff3065fcadd7d7f775f58ca6686ba138fd0bc478
