[INFO] fetching crate incrust 0.2.15...
[INFO] documenting incrust-0.2.15 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate incrust 0.2.15 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate incrust 0.2.15 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 incrust 0.2.15
[INFO] finished tweaking crates.io crate incrust 0.2.15
[INFO] tweaked toml for crates.io crate incrust 0.2.15 written to /workspace/builds/worker-7-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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded marksman_escape v0.1.2
[INFO] [stderr]   Downloaded maplit v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 7345d3dbbfbeec4a0e9468d017da5f987d5ee8f298dfbc8cb6dfacbae343a5fb
[INFO] running `Command { std: "docker" "start" "-a" "7345d3dbbfbeec4a0e9468d017da5f987d5ee8f298dfbc8cb6dfacbae343a5fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7345d3dbbfbeec4a0e9468d017da5f987d5ee8f298dfbc8cb6dfacbae343a5fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7345d3dbbfbeec4a0e9468d017da5f987d5ee8f298dfbc8cb6dfacbae343a5fb", kill_on_drop: false }`
[INFO] [stdout] 7345d3dbbfbeec4a0e9468d017da5f987d5ee8f298dfbc8cb6dfacbae343a5fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 927df780ae9941a4e89d4b491e0b7a42fdca4372feb70e2cbbf515beebfb1b2d
[INFO] running `Command { std: "docker" "start" "-a" "927df780ae9941a4e89d4b491e0b7a42fdca4372feb70e2cbbf515beebfb1b2d", kill_on_drop: false }`
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]     Checking marksman_escape v0.1.2
[INFO] [stderr]     Checking maplit v0.1.6
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]  Documenting incrust v0.2.15 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(associated_type_defaults)]
[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:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(box_syntax)]
[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:11:1
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]   --> src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | #![feature(specialization)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/parser/statements.rs:57:89
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn finish(begin: ExprStatement, inner: ParsedNodes, end: SimpleStatement) -> Option<(ParsedForStatement)> {
[INFO] [stdout]    |                                                                                         ^                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 57 -     fn finish(begin: ExprStatement, inner: ParsedNodes, end: SimpleStatement) -> Option<(ParsedForStatement)> {
[INFO] [stdout] 57 +     fn finish(begin: ExprStatement, inner: ParsedNodes, end: SimpleStatement) -> Option<ParsedForStatement> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0520]: `is_string` specializes an item from a parent `impl`, but that item is not marked `default`
[INFO] [stdout]   --> src/types/string.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     fn is_string(&self) -> bool {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot specialize default item `is_string`
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/types/defaults.rs:44:1
[INFO] [stdout]    |
[INFO] [stdout] 44 | impl <'r, T> AsString for T where T: for <'t> Type<'t> + 'r + Display {
[INFO] [stdout]    | --------------------------- parent `impl` is here
[INFO] [stdout]    |
[INFO] [stdout]    = note: to specialize, `is_string` in the parent `impl` must be marked `default`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0520, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0520`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `incrust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name incrust src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d9357c12dc8017e0 -L dependency=/opt/rustwide/target/debug/deps --extern log=/opt/rustwide/target/debug/deps/liblog-376fe3c7a6a66072.rmeta --extern maplit=/opt/rustwide/target/debug/deps/libmaplit-e1111111d46e2dcd.rmeta --extern marksman_escape=/opt/rustwide/target/debug/deps/libmarksman_escape-9b49c16c54ea6120.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-abda337a6f8311d8.rmeta --cap-lints=warn --crate-version 0.2.15` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "927df780ae9941a4e89d4b491e0b7a42fdca4372feb70e2cbbf515beebfb1b2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "927df780ae9941a4e89d4b491e0b7a42fdca4372feb70e2cbbf515beebfb1b2d", kill_on_drop: false }`
[INFO] [stdout] 927df780ae9941a4e89d4b491e0b7a42fdca4372feb70e2cbbf515beebfb1b2d
