[INFO] fetching crate nightfall 0.1.8...
[INFO] documenting nightfall-0.1.8 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate nightfall 0.1.8 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate nightfall 0.1.8 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded barrage v0.2.1
[INFO] [stderr]   Downloaded spinny v0.2.2
[INFO] [stderr]   Downloaded psutil v3.2.2
[INFO] [stderr]   Downloaded darwin-libproc-sys v0.1.2
[INFO] [stderr]   Downloaded err-derive v0.3.1
[INFO] [stderr]   Downloaded catty v0.1.4
[INFO] [stderr]   Downloaded spin v0.7.1
[INFO] [stderr]   Downloaded xtra v0.5.1
[INFO] [stderr]   Downloaded darwin-libproc v0.1.2
[INFO] [stderr]   Downloaded xtra_proc v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f7ea4926c328b72f635dbb0017020ac5140a3533b2c50fcc5b9356228b0e294d
[INFO] running `Command { std: "docker" "start" "-a" "f7ea4926c328b72f635dbb0017020ac5140a3533b2c50fcc5b9356228b0e294d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7ea4926c328b72f635dbb0017020ac5140a3533b2c50fcc5b9356228b0e294d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7ea4926c328b72f635dbb0017020ac5140a3533b2c50fcc5b9356228b0e294d", kill_on_drop: false }`
[INFO] [stdout] f7ea4926c328b72f635dbb0017020ac5140a3533b2c50fcc5b9356228b0e294d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3c11464fe9cb62566a5e0f0dc439acad37ed23df2d10bf9fb87e5df6f9999974
[INFO] running `Command { std: "docker" "start" "-a" "3c11464fe9cb62566a5e0f0dc439acad37ed23df2d10bf9fb87e5df6f9999974", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling platforms v2.0.0
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking spin v0.7.1
[INFO] [stderr]     Checking pollster v0.2.5
[INFO] [stderr]     Checking unescape v0.1.0
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking log v0.4.17
[INFO] [stderr]     Checking catty v0.1.4
[INFO] [stderr]     Checking spin v0.9.3
[INFO] [stderr]     Checking spinny v0.2.2
[INFO] [stderr]     Checking barrage v0.2.1
[INFO] [stderr]    Compiling err-derive v0.3.1
[INFO] [stderr]     Checking mio v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking nix v0.20.2
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]    Compiling xtra_proc v0.1.0
[INFO] [stderr]     Checking tokio v1.18.2
[INFO] [stderr]     Checking pin-project v1.0.10
[INFO] [stderr]     Checking flume v0.10.12
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking psutil v3.2.2
[INFO] [stderr]     Checking xtra v0.5.1
[INFO] [stderr]     Checking tokio-stream v0.1.8
[INFO] [stderr]     Checking serde_json v1.0.81
[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: 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 `nightfall`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `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=d7aef0e58404d4f4 -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-8ebf2e0bc4105a3e.so --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-dcce77079dd8fe1e.rmeta --extern err_derive=/opt/rustwide/target/debug/deps/liberr_derive-2cb50a2f4a2fc751.so --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-1479f2b7adeaa2b6.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-517551ce66822954.rmeta --extern psutil=/opt/rustwide/target/debug/deps/libpsutil-5ad3f9617b709cdb.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-311e13e6ee1f9772.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-13a5c0cb043f772a.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-2ba9365f9dbc4a99.rmeta --extern slog=/opt/rustwide/target/debug/deps/libslog-940b331028295da8.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-4833d2feacb2b566.rmeta --extern tokio_stream=/opt/rustwide/target/debug/deps/libtokio_stream-e3669b5d30790c4a.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-be110a03c834b533.rmeta --extern xtra=/opt/rustwide/target/debug/deps/libxtra-1e912946640bbb58.rmeta --extern xtra_proc=/opt/rustwide/target/debug/deps/libxtra_proc-cb41b30a8883693a.so --cap-lints=warn --crate-version 0.1.8` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "3c11464fe9cb62566a5e0f0dc439acad37ed23df2d10bf9fb87e5df6f9999974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c11464fe9cb62566a5e0f0dc439acad37ed23df2d10bf9fb87e5df6f9999974", kill_on_drop: false }`
[INFO] [stdout] 3c11464fe9cb62566a5e0f0dc439acad37ed23df2d10bf9fb87e5df6f9999974