[INFO] fetching crate enum_coder 0.0.0...
[INFO] documenting enum_coder-0.0.0 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate enum_coder 0.0.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate enum_coder 0.0.0 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 enum_coder 0.0.0
[INFO] finished tweaking crates.io crate enum_coder 0.0.0
[INFO] tweaked toml for crates.io crate enum_coder 0.0.0 written to /workspace/builds/worker-15/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] dc55b798a7c5248310372e12462230502f6a65ed037c699d524de8a92c27a4d7
[INFO] running `Command { std: "docker" "start" "-a" "dc55b798a7c5248310372e12462230502f6a65ed037c699d524de8a92c27a4d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc55b798a7c5248310372e12462230502f6a65ed037c699d524de8a92c27a4d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc55b798a7c5248310372e12462230502f6a65ed037c699d524de8a92c27a4d7", kill_on_drop: false }`
[INFO] [stdout] dc55b798a7c5248310372e12462230502f6a65ed037c699d524de8a92c27a4d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 242bfe9be40b7c7ae1a13794a9b9b10686b87bfba876d34527f623663f02f050
[INFO] running `Command { std: "docker" "start" "-a" "242bfe9be40b7c7ae1a13794a9b9b10686b87bfba876d34527f623663f02f050", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]  Documenting enum_coder v0.0.0 (/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(proc_macro_def_site, bind_by_move_pattern_guards)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `bind_by_move_pattern_guards` has been stable since 1.39.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `enum_coder`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type proc-macro --crate-name enum_coder 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 quote=/opt/rustwide/target/debug/deps/libquote-e19abcb5bb1d65c5.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-838515a04c722354.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "242bfe9be40b7c7ae1a13794a9b9b10686b87bfba876d34527f623663f02f050", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "242bfe9be40b7c7ae1a13794a9b9b10686b87bfba876d34527f623663f02f050", kill_on_drop: false }`
[INFO] [stdout] 242bfe9be40b7c7ae1a13794a9b9b10686b87bfba876d34527f623663f02f050
