[INFO] fetching crate jvm-serializable 0.0.3...
[INFO] documenting jvm-serializable-0.0.3 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate jvm-serializable 0.0.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate jvm-serializable 0.0.3 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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 jvm-macro v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15030fa1d7b9391417984c7fcd39b7884d2643b4726ac5093301610d7f207782
[INFO] running `Command { std: "docker" "start" "-a" "15030fa1d7b9391417984c7fcd39b7884d2643b4726ac5093301610d7f207782", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15030fa1d7b9391417984c7fcd39b7884d2643b4726ac5093301610d7f207782", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15030fa1d7b9391417984c7fcd39b7884d2643b4726ac5093301610d7f207782", kill_on_drop: false }`
[INFO] [stdout] 15030fa1d7b9391417984c7fcd39b7884d2643b4726ac5093301610d7f207782
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b089dc237de1642061a78da6082a4f958d26f93cc7b35cea4975402b31cc55ae
[INFO] running `Command { std: "docker" "start" "-a" "b089dc237de1642061a78da6082a4f958d26f93cc7b35cea4975402b31cc55ae", kill_on_drop: false }`
[INFO] [stderr]     Checking syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde_derive_internals v0.25.0
[INFO] [stderr]     Checking serde v1.0.127
[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:1:1
[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:2:1
[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:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(get_mut_unchecked)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bincode=/opt/rustwide/target/debug/deps/libbincode-5bc42d8bcdeb6a0d.rmeta --extern jvm_macro=/opt/rustwide/target/debug/deps/libjvm_macro-6931118d21ca0fd2.so --extern serde=/opt/rustwide/target/debug/deps/libserde-999d402033338fe1.rmeta --extern serde_derive_internals=/opt/rustwide/target/debug/deps/libserde_derive_internals-881a1ac6b7ee4209.rmeta --cap-lints=warn --crate-version 0.0.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b089dc237de1642061a78da6082a4f958d26f93cc7b35cea4975402b31cc55ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b089dc237de1642061a78da6082a4f958d26f93cc7b35cea4975402b31cc55ae", kill_on_drop: false }`
[INFO] [stdout] b089dc237de1642061a78da6082a4f958d26f93cc7b35cea4975402b31cc55ae
