[INFO] fetching crate fs-verity 0.1.0...
[INFO] documenting fs-verity-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate fs-verity 0.1.0 into /workspace/builds/worker-78/source
[INFO] validating manifest of crates.io crate fs-verity 0.1.0 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 fs-verity 0.1.0
[INFO] finished tweaking crates.io crate fs-verity 0.1.0
[INFO] tweaked toml for crates.io crate fs-verity 0.1.0 written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate crates.io crate fs-verity 0.1.0 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 parse-display-derive v0.4.0
[INFO] [stderr]   Downloaded num_enum v0.5.1
[INFO] [stderr]   Downloaded num_enum_derive v0.5.1
[INFO] [stderr]   Downloaded derivative v2.1.1
[INFO] [stderr]   Downloaded parse-display v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 9dae7972e2f5fa4a211a4f24ef83a0809042d73d1a11e2b2e856ffcd62cb38d8
[INFO] running `Command { std: "docker" "start" "-a" "9dae7972e2f5fa4a211a4f24ef83a0809042d73d1a11e2b2e856ffcd62cb38d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9dae7972e2f5fa4a211a4f24ef83a0809042d73d1a11e2b2e856ffcd62cb38d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dae7972e2f5fa4a211a4f24ef83a0809042d73d1a11e2b2e856ffcd62cb38d8", kill_on_drop: false }`
[INFO] [stdout] 9dae7972e2f5fa4a211a4f24ef83a0809042d73d1a11e2b2e856ffcd62cb38d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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] 33a54a7bc284965e5acf6cfec627d9f737f14d487a273bc6806a92e8c0d880a2
[INFO] running `Command { std: "docker" "start" "-a" "33a54a7bc284965e5acf6cfec627d9f737f14d487a273bc6806a92e8c0d880a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling once_cell v1.5.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking cpuid-bool v0.1.2
[INFO] [stderr]     Checking hex v0.4.2
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking sha2 v0.9.2
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling derivative v2.1.1
[INFO] [stderr]    Compiling parse-display-derive v0.4.0
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]     Checking num_enum v0.5.1
[INFO] [stderr]     Checking parse-display v0.4.0
[INFO] [stderr]  Documenting fs-verity v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 | #![feature(str_split_once)]
[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 `fs-verity`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name fs_verity src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7460ac3b82de1ee0 -L dependency=/opt/rustwide/target/debug/deps --extern hex=/opt/rustwide/target/debug/deps/libhex-4abae1b12f6de210.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-81e91d490a4ff1aa.rmeta --extern num_enum=/opt/rustwide/target/debug/deps/libnum_enum-0466e0f39b302f4e.rmeta --extern parse_display=/opt/rustwide/target/debug/deps/libparse_display-1ac6b20cdf4b6394.rmeta --extern sha2=/opt/rustwide/target/debug/deps/libsha2-615e5b7704e748de.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "33a54a7bc284965e5acf6cfec627d9f737f14d487a273bc6806a92e8c0d880a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33a54a7bc284965e5acf6cfec627d9f737f14d487a273bc6806a92e8c0d880a2", kill_on_drop: false }`
[INFO] [stdout] 33a54a7bc284965e5acf6cfec627d9f737f14d487a273bc6806a92e8c0d880a2