[INFO] fetching crate solitaire-core 0.0.1...
[INFO] documenting solitaire-core-0.0.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate solitaire-core 0.0.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate solitaire-core 0.0.1 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 solitaire-core 0.0.1
[INFO] finished tweaking crates.io crate solitaire-core 0.0.1
[INFO] tweaked toml for crates.io crate solitaire-core 0.0.1 written to /workspace/builds/worker-4-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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded built v0.3.2
[INFO] [stderr]   Downloaded git2 v0.10.2
[INFO] [stderr]   Downloaded libgit2-sys v0.9.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 8d2618952f0cf8754258fc88f8075c1abc4790718645bd31b2417598c0a791c9
[INFO] running `Command { std: "docker" "start" "-a" "8d2618952f0cf8754258fc88f8075c1abc4790718645bd31b2417598c0a791c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d2618952f0cf8754258fc88f8075c1abc4790718645bd31b2417598c0a791c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d2618952f0cf8754258fc88f8075c1abc4790718645bd31b2417598c0a791c9", kill_on_drop: false }`
[INFO] [stdout] 8d2618952f0cf8754258fc88f8075c1abc4790718645bd31b2417598c0a791c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 2d5e35020c2e1e813bdbab6c0ccacdd273584fd8dd557803d3e80e7fc92a691f
[INFO] running `Command { std: "docker" "start" "-a" "2d5e35020c2e1e813bdbab6c0ccacdd273584fd8dd557803d3e80e7fc92a691f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling percent-encoding v2.2.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling unicode-bidi v0.3.13
[INFO] [stderr]    Compiling form_urlencoded v1.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling jobserver v0.1.26
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.56
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling idna v0.3.0
[INFO] [stderr]    Compiling anyhow v1.0.71
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]    Compiling libz-sys v1.1.9
[INFO] [stderr]    Compiling libgit2-sys v0.9.2
[INFO] [stderr]    Compiling url v2.3.1
[INFO] [stderr]    Compiling chrono v0.4.24
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling git2 v0.10.2
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling toml v0.5.11
[INFO] [stderr]    Compiling built v0.3.2
[INFO] [stderr]    Compiling solitaire-core v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting solitaire-core v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_expect_none)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(fn_traits)]
[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:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(unboxed_closures)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `solitaire-core`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name solitaire_core src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8e74999aab72ac2a -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-3570d1a0a25354c2.rmeta --extern bincode=/opt/rustwide/target/debug/deps/libbincode-fa6e8547bf6b80d5.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-e1bcbf4a58b4fffe.so --extern serde=/opt/rustwide/target/debug/deps/libserde-1c6faa7f85a346b1.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-33c3c956dc0203d7.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-ac1911d2420e519a.rmeta --cap-lints=warn --crate-version 0.0.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2d5e35020c2e1e813bdbab6c0ccacdd273584fd8dd557803d3e80e7fc92a691f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d5e35020c2e1e813bdbab6c0ccacdd273584fd8dd557803d3e80e7fc92a691f", kill_on_drop: false }`
[INFO] [stdout] 2d5e35020c2e1e813bdbab6c0ccacdd273584fd8dd557803d3e80e7fc92a691f
