[INFO] fetching crate nightfall 0.1.8...
[INFO] documenting nightfall-0.1.8 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate nightfall 0.1.8 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate nightfall 0.1.8 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 nightfall 0.1.8
[INFO] finished tweaking crates.io crate nightfall 0.1.8
[INFO] tweaked toml for crates.io crate nightfall 0.1.8 written to /workspace/builds/worker-1-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 concurrent-queue v1.2.4
[INFO] [stderr]   Downloaded unescape v0.1.0
[INFO] [stderr]   Downloaded cache-padded v1.3.0
[INFO] [stderr]   Downloaded darwin-libproc v0.1.2
[INFO] [stderr]   Downloaded barrage v0.2.3
[INFO] [stderr]   Downloaded platforms v2.0.0
[INFO] [stderr]   Downloaded err-derive v0.3.1
[INFO] [stderr]   Downloaded darwin-libproc-sys v0.1.2
[INFO] [stderr]   Downloaded psutil v3.3.0
[INFO] [stderr]   Downloaded nix v0.20.2
[INFO] [stderr]   Downloaded catty v0.1.5
[INFO] [stderr]   Downloaded xtra_proc v0.1.0
[INFO] [stderr]   Downloaded xtra v0.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 4c4d0efd5506c1153c3b3d521fa2d0aab2c1d52e0668a2c29c1074d838ed5200
[INFO] running `Command { std: "docker" "start" "-a" "4c4d0efd5506c1153c3b3d521fa2d0aab2c1d52e0668a2c29c1074d838ed5200", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c4d0efd5506c1153c3b3d521fa2d0aab2c1d52e0668a2c29c1074d838ed5200", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c4d0efd5506c1153c3b3d521fa2d0aab2c1d52e0668a2c29c1074d838ed5200", kill_on_drop: false }`
[INFO] [stdout] 4c4d0efd5506c1153c3b3d521fa2d0aab2c1d52e0668a2c29c1074d838ed5200
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 8368681e17b4f4c66d566f837dad52b8baad399c3f4d8d159ef30455dde76e63
[INFO] running `Command { std: "docker" "start" "-a" "8368681e17b4f4c66d566f837dad52b8baad399c3f4d8d159ef30455dde76e63", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]    Compiling platforms v2.0.0
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking cache-padded v1.3.0
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling err-derive v0.3.1
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking concurrent-queue v1.2.4
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking catty v0.1.5
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking barrage v0.2.3
[INFO] [stderr]     Checking pollster v0.2.5
[INFO] [stderr]     Checking unescape v0.1.0
[INFO] [stderr]     Checking glob v0.3.1
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking nix v0.20.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.195
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]     Checking tokio v1.35.1
[INFO] [stderr]     Checking pin-project v1.1.3
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling xtra_proc v0.1.0
[INFO] [stderr]     Checking xtra v0.5.2
[INFO] [stderr]     Checking psutil v3.3.0
[INFO] [stderr]     Checking serde v1.0.195
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking serde_json v1.0.111
[INFO] [stderr]  Documenting nightfall v0.1.8 (/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(assert_matches, result_flattening, hash_drain_filter)]
[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:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(assert_matches, result_flattening, hash_drain_filter)]
[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:2:47
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(assert_matches, result_flattening, hash_drain_filter)]
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `hash_drain_filter`
[INFO] [stdout]  --> src/lib.rs:2:47
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(assert_matches, result_flattening, hash_drain_filter)]
[INFO] [stdout]   |                                               ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `nightfall`
[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 nightfall src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=98600a38fc0de2cb -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-725ffe9fd02a1e56.so --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-1b06147f67f93fdc.rmeta --extern err_derive=/opt/rustwide/target/debug/deps/liberr_derive-7fffbe3e141ba6de.so --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-e7445b4e8703c20b.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-ddcc3570134c2523.rmeta --extern psutil=/opt/rustwide/target/debug/deps/libpsutil-c12acf751684fac7.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-f12fcc055fb2bfeb.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-bf8432dc1376079f.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-7e5a118ac7482342.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-300a76947a1680a9.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-b6d3ca3bb53afcca.rmeta --extern tokio_stream=/opt/rustwide/target/debug/deps/libtokio_stream-e310ccc57c152bb5.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-beff92880a28712f.rmeta --extern xtra=/opt/rustwide/target/debug/deps/libxtra-4f9a1676925f4334.rmeta --extern xtra_proc=/opt/rustwide/target/debug/deps/libxtra_proc-e921ded3651ec000.so --cap-lints=warn --crate-version 0.1.8` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8368681e17b4f4c66d566f837dad52b8baad399c3f4d8d159ef30455dde76e63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8368681e17b4f4c66d566f837dad52b8baad399c3f4d8d159ef30455dde76e63", kill_on_drop: false }`
[INFO] [stdout] 8368681e17b4f4c66d566f837dad52b8baad399c3f4d8d159ef30455dde76e63
