[INFO] fetching crate css-modules-macros 0.5.2...
[INFO] documenting css-modules-macros-0.5.2 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate css-modules-macros 0.5.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate css-modules-macros 0.5.2 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate css-modules-macros 0.5.2
[INFO] finished tweaking crates.io crate css-modules-macros 0.5.2
[INFO] tweaked toml for crates.io crate css-modules-macros 0.5.2 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8ceaa969218b06c52d0c5f71acfcba63dda89c98569b7aa82bb42e7d34fa4ce
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a8ceaa969218b06c52d0c5f71acfcba63dda89c98569b7aa82bb42e7d34fa4ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8ceaa969218b06c52d0c5f71acfcba63dda89c98569b7aa82bb42e7d34fa4ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8ceaa969218b06c52d0c5f71acfcba63dda89c98569b7aa82bb42e7d34fa4ce", kill_on_drop: false }`
[INFO] [stdout] a8ceaa969218b06c52d0c5f71acfcba63dda89c98569b7aa82bb42e7d34fa4ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 09e1536519b3aced5b9d5f6d8655bde12ab863f3d32a70bee2c8f2202a2d308f
[INFO] running `Command { std: "docker" "start" "-a" "09e1536519b3aced5b9d5f6d8655bde12ab863f3d32a70bee2c8f2202a2d308f", kill_on_drop: false }`
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]  Documenting css-modules-macros v0.5.2 (/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_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `css-modules-macros`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name css_modules_macros 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-db4661b06a455c01.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-0f9380ae1a92c2fd.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.5.2` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "09e1536519b3aced5b9d5f6d8655bde12ab863f3d32a70bee2c8f2202a2d308f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09e1536519b3aced5b9d5f6d8655bde12ab863f3d32a70bee2c8f2202a2d308f", kill_on_drop: false }`
[INFO] [stdout] 09e1536519b3aced5b9d5f6d8655bde12ab863f3d32a70bee2c8f2202a2d308f
