[INFO] fetching crate d3ne 0.5.3...
[INFO] documenting d3ne-0.5.3 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate d3ne 0.5.3 into /workspace/builds/worker-35/source
[INFO] validating manifest of crates.io crate d3ne 0.5.3 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate d3ne 0.5.3
[INFO] finished tweaking crates.io crate d3ne 0.5.3
[INFO] tweaked toml for crates.io crate d3ne 0.5.3 written to /workspace/builds/worker-35/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05f49efb5376e9be38862b49eeb36891bf9b46de3a794ad9842c7dd84c06aad6
[INFO] running `Command { std: "docker" "start" "-a" "05f49efb5376e9be38862b49eeb36891bf9b46de3a794ad9842c7dd84c06aad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05f49efb5376e9be38862b49eeb36891bf9b46de3a794ad9842c7dd84c06aad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05f49efb5376e9be38862b49eeb36891bf9b46de3a794ad9842c7dd84c06aad6", kill_on_drop: false }`
[INFO] [stdout] 05f49efb5376e9be38862b49eeb36891bf9b46de3a794ad9842c7dd84c06aad6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-35/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cacbc5210048c31819687ca839c0f415a647e67fc491c47fa18d3326f8f16cb3
[INFO] running `Command { std: "docker" "start" "-a" "cacbc5210048c31819687ca839c0f415a647e67fc491c47fa18d3326f8f16cb3", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]  Documenting d3ne v0.5.3 (/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(unboxed_closures)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `d3ne`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name d3ne 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 --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-c71486e08dde7454.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a148e46ac9993373.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-478ef5e4f2dae739.rmeta --cap-lints=warn --crate-version 0.5.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "cacbc5210048c31819687ca839c0f415a647e67fc491c47fa18d3326f8f16cb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cacbc5210048c31819687ca839c0f415a647e67fc491c47fa18d3326f8f16cb3", kill_on_drop: false }`
[INFO] [stdout] cacbc5210048c31819687ca839c0f415a647e67fc491c47fa18d3326f8f16cb3
