[INFO] fetching crate include-flate-codegen 0.1.4...
[INFO] documenting include-flate-codegen-0.1.4 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate include-flate-codegen 0.1.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate include-flate-codegen 0.1.4 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate include-flate-codegen 0.1.4
[INFO] finished tweaking crates.io crate include-flate-codegen 0.1.4
[INFO] tweaked toml for crates.io crate include-flate-codegen 0.1.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+beta-2022-05-20" "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] 6a337099727a05d863e3cd7a9b98858b5081a506a59e95bad54f617df1b90dc4
[INFO] running `Command { std: "docker" "start" "-a" "6a337099727a05d863e3cd7a9b98858b5081a506a59e95bad54f617df1b90dc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a337099727a05d863e3cd7a9b98858b5081a506a59e95bad54f617df1b90dc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a337099727a05d863e3cd7a9b98858b5081a506a59e95bad54f617df1b90dc4", kill_on_drop: false }`
[INFO] [stdout] 6a337099727a05d863e3cd7a9b98858b5081a506a59e95bad54f617df1b90dc4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ecb012a73988e84b167e31652f144a0d071dc03dbb90edfbab5a3b48cf3201f
[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" "8ecb012a73988e84b167e31652f144a0d071dc03dbb90edfbab5a3b48cf3201f", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking rle-decode-fast v1.0.3
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]     Checking syn v1.0.95
[INFO] [stderr]     Checking crc32fast v1.3.2
[INFO] [stderr]     Checking libflate_lz77 v1.1.0
[INFO] [stderr]     Checking libflate v1.2.0
[INFO] [stderr]  Documenting include-flate-codegen v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:16:46
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![cfg_attr(not(feature = "stable"), feature(proc_macro_span))]
[INFO] [stdout]    |                                              ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `include-flate-codegen`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name include_flate_codegen src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=be5ed3a5cc4f6f93 -L dependency=/opt/rustwide/target/debug/deps --extern libflate=/opt/rustwide/target/debug/deps/liblibflate-8e4cafc75a8ea640.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-412f8ac4638e7e9b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-c3252a44ced4e42f.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-1d7c93ee4c37619e.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8ecb012a73988e84b167e31652f144a0d071dc03dbb90edfbab5a3b48cf3201f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ecb012a73988e84b167e31652f144a0d071dc03dbb90edfbab5a3b48cf3201f", kill_on_drop: false }`
[INFO] [stdout] 8ecb012a73988e84b167e31652f144a0d071dc03dbb90edfbab5a3b48cf3201f