[INFO] fetching crate libwifi 0.3.0...
[INFO] documenting libwifi-0.3.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate libwifi 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate libwifi 0.3.0 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 libwifi 0.3.0
[INFO] finished tweaking crates.io crate libwifi 0.3.0
[INFO] tweaked toml for crates.io crate libwifi 0.3.0 written to /workspace/builds/worker-4/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libwifi_macros v0.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 8d64adbc6ffd45199334d870fef63f77e8fc5e917398b8b321fac70dd6cd82a8
[INFO] running `Command { std: "docker" "start" "-a" "8d64adbc6ffd45199334d870fef63f77e8fc5e917398b8b321fac70dd6cd82a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d64adbc6ffd45199334d870fef63f77e8fc5e917398b8b321fac70dd6cd82a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d64adbc6ffd45199334d870fef63f77e8fc5e917398b8b321fac70dd6cd82a8", kill_on_drop: false }`
[INFO] [stdout] 8d64adbc6ffd45199334d870fef63f77e8fc5e917398b8b321fac70dd6cd82a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 1734c25ab4a280554b35f06d399aa3d3e0dd300fe3596ddd2cd5dd7411d1fa71
[INFO] running `Command { std: "docker" "start" "-a" "1734c25ab4a280554b35f06d399aa3d3e0dd300fe3596ddd2cd5dd7411d1fa71", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking wyz v0.2.0
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking bitvec v0.19.6
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling libwifi_macros v0.0.1
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]  Documenting libwifi v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(destructuring_assignment)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `destructuring_assignment` has been stable since 1.59.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `libwifi`
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name libwifi src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4070b114a9dd41fe -L dependency=/opt/rustwide/target/debug/deps --extern libwifi_macros=/opt/rustwide/target/debug/deps/liblibwifi_macros-075dd757e040fc79.so --extern log=/opt/rustwide/target/debug/deps/liblog-11fcf639aa746c8b.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-a94a18f0eef39fbf.rmeta --extern strum_macros=/opt/rustwide/target/debug/deps/libstrum_macros-936b8a3867a937d9.so --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-8c55bfb6f5f41cd4.rmeta --cap-lints=warn --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1734c25ab4a280554b35f06d399aa3d3e0dd300fe3596ddd2cd5dd7411d1fa71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1734c25ab4a280554b35f06d399aa3d3e0dd300fe3596ddd2cd5dd7411d1fa71", kill_on_drop: false }`
[INFO] [stdout] 1734c25ab4a280554b35f06d399aa3d3e0dd300fe3596ddd2cd5dd7411d1fa71