[INFO] fetching crate datatest 0.8.0...
[INFO] documenting datatest-0.8.0 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate datatest 0.8.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate datatest 0.8.0 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] started tweaking crates.io crate datatest 0.8.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate datatest 0.8.0
[INFO] tweaked toml for crates.io crate datatest 0.8.0 written to /workspace/builds/worker-6-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 datatest-derive v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 25fed76d8712abdeb709b3b8aa985d01ca1fcf9ed210e46c942b4e0e0e5b4e7f
[INFO] running `Command { std: "docker" "start" "-a" "25fed76d8712abdeb709b3b8aa985d01ca1fcf9ed210e46c942b4e0e0e5b4e7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25fed76d8712abdeb709b3b8aa985d01ca1fcf9ed210e46c942b4e0e0e5b4e7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25fed76d8712abdeb709b3b8aa985d01ca1fcf9ed210e46c942b4e0e0e5b4e7f", kill_on_drop: false }`
[INFO] [stdout] 25fed76d8712abdeb709b3b8aa985d01ca1fcf9ed210e46c942b4e0e0e5b4e7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 68de3d40f79bb9b5f0cb5c23a4d466c7cf626902824e1a863bb22a1c664a57d9
[INFO] running `Command { std: "docker" "start" "-a" "68de3d40f79bb9b5f0cb5c23a4d466c7cf626902824e1a863bb22a1c664a57d9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking unsafe-libyaml v0.2.10
[INFO] [stderr]    Compiling datatest v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr] warning: datatest@0.8.0: attempting to compile datatest on stable without opting in to subvert_stable_guarantees feature; will fail
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling datatest-derive v0.8.0
[INFO] [stderr]    Compiling ctor v0.2.6
[INFO] [stderr]     Checking serde v1.0.195
[INFO] [stderr]     Checking serde_yaml v0.9.30
[INFO] [stderr]  Documenting datatest v0.8.0 (/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(test)]
[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(specialization)]
[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:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(unboxed_closures)]
[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:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(fn_traits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] The following warnings were emitted during compilation:
[INFO] [stderr] 
[INFO] [stderr] warning: datatest@0.8.0: attempting to compile datatest on stable without opting in to subvert_stable_guarantees feature; will fail
[INFO] [stderr] 
[INFO] [stderr] error: could not document `datatest`
[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 datatest src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="test_case_registration"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5050c8630dc984ae -L dependency=/opt/rustwide/target/debug/deps --extern ctor=/opt/rustwide/target/debug/deps/libctor-1f7e6e9c0b0dad00.so --extern datatest_derive=/opt/rustwide/target/debug/deps/libdatatest_derive-d8615b9a0003d021.so --extern regex=/opt/rustwide/target/debug/deps/libregex-32b9f870004ccabd.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-8407c28a5cae4f46.rmeta --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-f64cdb50d51b52aa.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-0098779221708706.rmeta --extern yaml_rust=/opt/rustwide/target/debug/deps/libyaml_rust-411458cd4ac76b95.rmeta --cap-lints=warn --crate-version 0.8.0 --cfg 'feature="rustc_is_stable"' --cfg 'feature="rustc_test_TestOpts_filters_vec"' --cfg 'feature="rustc_test_Ignore_messages"'` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "68de3d40f79bb9b5f0cb5c23a4d466c7cf626902824e1a863bb22a1c664a57d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68de3d40f79bb9b5f0cb5c23a4d466c7cf626902824e1a863bb22a1c664a57d9", kill_on_drop: false }`
[INFO] [stdout] 68de3d40f79bb9b5f0cb5c23a4d466c7cf626902824e1a863bb22a1c664a57d9
