[INFO] fetching crate valkyrie-error 0.1.0...
[INFO] documenting valkyrie-error-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate valkyrie-error 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate valkyrie-error 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 valkyrie-error 0.1.0
[INFO] finished tweaking crates.io crate valkyrie-error 0.1.0
[INFO] tweaked toml for crates.io crate valkyrie-error 0.1.0 written to /workspace/builds/worker-3/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] [stderr]     Blocking waiting for file lock on package cache
[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 type-uuid-derive v0.1.2
[INFO] [stderr]   Downloaded type-uuid v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 27d79318b08317b1bb1b74d7a6239d30ea57acdd10fff6a7250c2b9fddfcd7ff
[INFO] running `Command { std: "docker" "start" "-a" "27d79318b08317b1bb1b74d7a6239d30ea57acdd10fff6a7250c2b9fddfcd7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27d79318b08317b1bb1b74d7a6239d30ea57acdd10fff6a7250c2b9fddfcd7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27d79318b08317b1bb1b74d7a6239d30ea57acdd10fff6a7250c2b9fddfcd7ff", kill_on_drop: false }`
[INFO] [stdout] 27d79318b08317b1bb1b74d7a6239d30ea57acdd10fff6a7250c2b9fddfcd7ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 4a5a31aa7996bc58bd68e365a3e15f90062d9c635b6b45ab12b39ec68cb08393
[INFO] running `Command { std: "docker" "start" "-a" "4a5a31aa7996bc58bd68e365a3e15f90062d9c635b6b45ab12b39ec68cb08393", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling rayon-core v1.9.3
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling rayon v1.5.3
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num-complex v0.4.1
[INFO] [stderr]    Compiling type-uuid-derive v0.1.2
[INFO] [stderr]     Checking bigdecimal v0.3.0
[INFO] [stderr]     Checking type-uuid v0.1.2
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]  Documenting valkyrie-error 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:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait_v2)]
[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 `valkyrie-error`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name valkyrie_error src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9e008ab80a28798d -L dependency=/opt/rustwide/target/debug/deps --extern bigdecimal=/opt/rustwide/target/debug/deps/libbigdecimal-f53dfbd8bea4f3df.rmeta --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-22d7f70832a3b85e.rmeta --extern indexmap=/opt/rustwide/target/debug/deps/libindexmap-5310a864417c27ab.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-74f83ab77af4050a.rmeta --extern type_uuid=/opt/rustwide/target/debug/deps/libtype_uuid-f722178566ec04f4.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "4a5a31aa7996bc58bd68e365a3e15f90062d9c635b6b45ab12b39ec68cb08393", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a5a31aa7996bc58bd68e365a3e15f90062d9c635b6b45ab12b39ec68cb08393", kill_on_drop: false }`
[INFO] [stdout] 4a5a31aa7996bc58bd68e365a3e15f90062d9c635b6b45ab12b39ec68cb08393