[INFO] fetching crate uklid 0.3.0...
[INFO] documenting uklid-0.3.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate uklid 0.3.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate uklid 0.3.0 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 uklid 0.3.0
[INFO] finished tweaking crates.io crate uklid 0.3.0
[INFO] tweaked toml for crates.io crate uklid 0.3.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate uklid 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nix v0.21.2
[INFO] [stderr]   Downloaded assert_fs v1.0.7
[INFO] [stderr]   Downloaded chrono-humanize v0.2.1
[INFO] [stderr]   Downloaded conpty v0.3.0
[INFO] [stderr]   Downloaded expectrl v0.3.0
[INFO] [stderr]   Downloaded filesize v0.2.0
[INFO] [stderr]   Downloaded human_bytes v0.3.1
[INFO] [stderr]   Downloaded spinners v4.0.0
[INFO] [stderr]   Downloaded ptyprocess v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stdout] 14253f274da60f91e7fc2a96f17872d0bdcfb9f36063594761bf1c05a0e1e015
[INFO] running `Command { std: "docker" "start" "-a" "14253f274da60f91e7fc2a96f17872d0bdcfb9f36063594761bf1c05a0e1e015", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14253f274da60f91e7fc2a96f17872d0bdcfb9f36063594761bf1c05a0e1e015", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14253f274da60f91e7fc2a96f17872d0bdcfb9f36063594761bf1c05a0e1e015", kill_on_drop: false }`
[INFO] [stdout] 14253f274da60f91e7fc2a96f17872d0bdcfb9f36063594761bf1c05a0e1e015
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stdout] e5255194c784454d4d624ad1678a113005f66ec7f731f18403207917cd1302d5
[INFO] running `Command { std: "docker" "start" "-a" "e5255194c784454d4d624ad1678a113005f66ec7f731f18403207917cd1302d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.124
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]     Checking predicates-core v1.0.3
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking termtree v0.2.4
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking zeroize v1.5.4
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking human_bytes v0.3.1
[INFO] [stderr]     Checking filesize v0.2.0
[INFO] [stderr]     Checking fs_extra v1.2.0
[INFO] [stderr]     Checking home v0.5.3
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking predicates-tree v1.0.5
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking clap_lex v0.1.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking nix v0.21.2
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking nix v0.23.1
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking shellexpand v2.1.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking predicates v2.1.1
[INFO] [stderr]     Checking console v0.15.0
[INFO] [stderr]     Checking dialoguer v0.10.0
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking chrono-humanize v0.2.1
[INFO] [stderr]     Checking assert_cmd v2.0.4
[INFO] [stderr]     Checking globwalk v0.8.1
[INFO] [stderr]     Checking assert_fs v1.0.7
[INFO] [stderr]     Checking ptyprocess v0.3.0
[INFO] [stderr]     Checking expectrl v0.3.0
[INFO] [stderr]    Compiling strum_macros v0.24.0
[INFO] [stderr]    Compiling clap_derive v3.1.7
[INFO] [stderr]     Checking strum v0.24.0
[INFO] [stderr]     Checking spinners v4.0.0
[INFO] [stderr]     Checking clap v3.1.12
[INFO] [stderr]  Documenting uklid v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(path_try_exists)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `uklid`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name uklid src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6ada10c45f1415e0 -L dependency=/opt/rustwide/target/debug/deps --extern assert_cmd=/opt/rustwide/target/debug/deps/libassert_cmd-0b9d79fd4cda6499.rmeta --extern assert_fs=/opt/rustwide/target/debug/deps/libassert_fs-224a44e15f015bc0.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-a6e2429f8c7ef4f4.rmeta --extern chrono_humanize=/opt/rustwide/target/debug/deps/libchrono_humanize-5fa1c5c414c27c9a.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-1799c626999f42bb.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-a8b199d9e118fab1.rmeta --extern dialoguer=/opt/rustwide/target/debug/deps/libdialoguer-da677463a575929c.rmeta --extern expectrl=/opt/rustwide/target/debug/deps/libexpectrl-7dca2d0c773d91a8.rmeta --extern filesize=/opt/rustwide/target/debug/deps/libfilesize-703841461cbc8938.rmeta --extern fs_extra=/opt/rustwide/target/debug/deps/libfs_extra-ad4e2b3c81d724d4.rmeta --extern home=/opt/rustwide/target/debug/deps/libhome-a10293341ae37dcd.rmeta --extern human_bytes=/opt/rustwide/target/debug/deps/libhuman_bytes-03830fb882c42419.rmeta --extern predicates=/opt/rustwide/target/debug/deps/libpredicates-41051596cfddb926.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-cb768725e26a3b91.rmeta --extern shellexpand=/opt/rustwide/target/debug/deps/libshellexpand-89af68d1ef4d0186.rmeta --extern spinners=/opt/rustwide/target/debug/deps/libspinners-76f70a2617785777.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-aa60abb9fe6cfa5b.rmeta --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e5255194c784454d4d624ad1678a113005f66ec7f731f18403207917cd1302d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5255194c784454d4d624ad1678a113005f66ec7f731f18403207917cd1302d5", kill_on_drop: false }`
[INFO] [stdout] e5255194c784454d4d624ad1678a113005f66ec7f731f18403207917cd1302d5