[INFO] fetching crate syn-test-suite 0.0.0+test...
[INFO] documenting syn-test-suite-0.0.0+test against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate syn-test-suite 0.0.0+test into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate syn-test-suite 0.0.0+test on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syn-test-suite 0.0.0+test
[INFO] finished tweaking crates.io crate syn-test-suite 0.0.0+test
[INFO] tweaked toml for crates.io crate syn-test-suite 0.0.0+test written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 090d628cdcf81b71d33a1cf961a33899da9633f97d91289c063135109c8a46fe
[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" "090d628cdcf81b71d33a1cf961a33899da9633f97d91289c063135109c8a46fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "090d628cdcf81b71d33a1cf961a33899da9633f97d91289c063135109c8a46fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "090d628cdcf81b71d33a1cf961a33899da9633f97d91289c063135109c8a46fe", kill_on_drop: false }`
[INFO] [stdout] 090d628cdcf81b71d33a1cf961a33899da9633f97d91289c063135109c8a46fe
[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-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f0fd7636d51a08e1519e619be0c31d28cd028a9a929bae45834c4b02bd0bb48
[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" "5f0fd7636d51a08e1519e619be0c31d28cd028a9a929bae45834c4b02bd0bb48", kill_on_drop: false }`
[INFO] [stderr]  Documenting syn-test-suite v0.0.0+test (/opt/rustwide/workdir)
[INFO] [stdout] error: expected item, found `@`
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | @
[INFO] [stdout]   | ^ expected item
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `syn-test-suite`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name syn_test_suite 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 --cap-lints=warn --crate-version 0.0.0+test` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "5f0fd7636d51a08e1519e619be0c31d28cd028a9a929bae45834c4b02bd0bb48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f0fd7636d51a08e1519e619be0c31d28cd028a9a929bae45834c4b02bd0bb48", kill_on_drop: false }`
[INFO] [stdout] 5f0fd7636d51a08e1519e619be0c31d28cd028a9a929bae45834c4b02bd0bb48