[INFO] fetching crate mdbx-proc 0.1.1...
[INFO] documenting mdbx-proc-0.1.1 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate mdbx-proc 0.1.1 into /workspace/builds/worker-22/source
[INFO] validating manifest of crates.io crate mdbx-proc 0.1.1 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 mdbx-proc 0.1.1
[INFO] finished tweaking crates.io crate mdbx-proc 0.1.1
[INFO] tweaked toml for crates.io crate mdbx-proc 0.1.1 written to /workspace/builds/worker-22/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-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] [stdout] 6d5cc21ce75bc6d1c519bd3f8448d23e728e8650c783b5002764536ccdda08a1
[INFO] running `Command { std: "docker" "start" "-a" "6d5cc21ce75bc6d1c519bd3f8448d23e728e8650c783b5002764536ccdda08a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d5cc21ce75bc6d1c519bd3f8448d23e728e8650c783b5002764536ccdda08a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d5cc21ce75bc6d1c519bd3f8448d23e728e8650c783b5002764536ccdda08a1", kill_on_drop: false }`
[INFO] [stdout] 6d5cc21ce75bc6d1c519bd3f8448d23e728e8650c783b5002764536ccdda08a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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] [stdout] 4ca35299d8e949f60ffeefdc35edc613b6bae7574fe679d5c55ca860f320a473
[INFO] running `Command { std: "docker" "start" "-a" "4ca35299d8e949f60ffeefdc35edc613b6bae7574fe679d5c55ca860f320a473", kill_on_drop: false }`
[INFO] [stderr]  Documenting mdbx-proc v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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 `mdbx-proc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type proc-macro --crate-name mdbx_proc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c9e8c8f4fc5f593a -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "4ca35299d8e949f60ffeefdc35edc613b6bae7574fe679d5c55ca860f320a473", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ca35299d8e949f60ffeefdc35edc613b6bae7574fe679d5c55ca860f320a473", kill_on_drop: false }`
[INFO] [stdout] 4ca35299d8e949f60ffeefdc35edc613b6bae7574fe679d5c55ca860f320a473