[INFO] fetching crate jvm-serializable 0.0.3...
[INFO] documenting jvm-serializable-0.0.3 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate jvm-serializable 0.0.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate jvm-serializable 0.0.3 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jvm-serializable 0.0.3
[INFO] finished tweaking crates.io crate jvm-serializable 0.0.3
[INFO] tweaked toml for crates.io crate jvm-serializable 0.0.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e35a5ec7d953b81a37653d7cbbc2bf955f33170fa61577aa55f8161e5d96b66f
[INFO] running `Command { std: "docker" "start" "-a" "e35a5ec7d953b81a37653d7cbbc2bf955f33170fa61577aa55f8161e5d96b66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e35a5ec7d953b81a37653d7cbbc2bf955f33170fa61577aa55f8161e5d96b66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e35a5ec7d953b81a37653d7cbbc2bf955f33170fa61577aa55f8161e5d96b66f", kill_on_drop: false }`
[INFO] [stdout] e35a5ec7d953b81a37653d7cbbc2bf955f33170fa61577aa55f8161e5d96b66f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1afca53bf718511e4f669134be6351ae7db3ba109841603c266dadd5fb39732
[INFO] running `Command { std: "docker" "start" "-a" "f1afca53bf718511e4f669134be6351ae7db3ba109841603c266dadd5fb39732", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking serde_derive_internals v0.25.0
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]    Compiling jvm-macro v0.0.1
[INFO] [stderr]  Documenting jvm-serializable v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_name_of_val)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(core_intrinsics)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(get_mut_unchecked)]
[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 `jvm-serializable`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name jvm_serializable src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f364bbbd8960a66e -L dependency=/opt/rustwide/target/debug/deps --extern bincode=/opt/rustwide/target/debug/deps/libbincode-e63bb09d1c92d397.rmeta --extern jvm_macro=/opt/rustwide/target/debug/deps/libjvm_macro-3664bfa24b5e1a0b.so --extern serde=/opt/rustwide/target/debug/deps/libserde-3913d27e4fd23b6c.rmeta --extern serde_derive_internals=/opt/rustwide/target/debug/deps/libserde_derive_internals-3bc94547a4ceac41.rmeta --cap-lints=warn --crate-version 0.0.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f1afca53bf718511e4f669134be6351ae7db3ba109841603c266dadd5fb39732", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1afca53bf718511e4f669134be6351ae7db3ba109841603c266dadd5fb39732", kill_on_drop: false }`
[INFO] [stdout] f1afca53bf718511e4f669134be6351ae7db3ba109841603c266dadd5fb39732