[INFO] fetching crate buffering_nocopy_macro 0.2.2...
[INFO] documenting buffering_nocopy_macro-0.2.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate buffering_nocopy_macro 0.2.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate buffering_nocopy_macro 0.2.2 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buffering_nocopy_macro 0.2.2
[INFO] finished tweaking crates.io crate buffering_nocopy_macro 0.2.2
[INFO] tweaked toml for crates.io crate buffering_nocopy_macro 0.2.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", 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] bfda166b3ed13cb6e9943df8b13039d26dd0e96f3680e3e965b2ad54642ed088
[INFO] running `Command { std: "docker" "start" "-a" "bfda166b3ed13cb6e9943df8b13039d26dd0e96f3680e3e965b2ad54642ed088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfda166b3ed13cb6e9943df8b13039d26dd0e96f3680e3e965b2ad54642ed088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfda166b3ed13cb6e9943df8b13039d26dd0e96f3680e3e965b2ad54642ed088", kill_on_drop: false }`
[INFO] [stdout] bfda166b3ed13cb6e9943df8b13039d26dd0e96f3680e3e965b2ad54642ed088
[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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "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] 36c70489347561cef111520093c8ecafb0d3afe2df3cb1920e2dfdd317752b29
[INFO] running `Command { std: "docker" "start" "-a" "36c70489347561cef111520093c8ecafb0d3afe2df3cb1920e2dfdd317752b29", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking proc-macro2 v1.0.39
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]  Documenting buffering_nocopy_macro v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `syn::export`
[INFO] [stdout]   --> src/lib.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     export::Span, Attribute, DeriveInput, Field, Ident, Lit, Meta, MetaList, MetaNameValue,
[INFO] [stdout]    |     ^^^^^^ could not find `export` in `syn`
[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 E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `buffering_nocopy_macro`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name buffering_nocopy_macro src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e8cc64c2ac2cb71d -L dependency=/opt/rustwide/target/debug/deps --extern quote=/opt/rustwide/target/debug/deps/libquote-9a84eb7803ab612a.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-0a9e1b9c1a926118.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.2.2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "36c70489347561cef111520093c8ecafb0d3afe2df3cb1920e2dfdd317752b29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36c70489347561cef111520093c8ecafb0d3afe2df3cb1920e2dfdd317752b29", kill_on_drop: false }`
[INFO] [stdout] 36c70489347561cef111520093c8ecafb0d3afe2df3cb1920e2dfdd317752b29