[INFO] fetching crate crsp-base 0.2.0...
[INFO] documenting crsp-base-0.2.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate crsp-base 0.2.0 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate crsp-base 0.2.0 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 crsp-base 0.2.0
[INFO] finished tweaking crates.io crate crsp-base 0.2.0
[INFO] tweaked toml for crates.io crate crsp-base 0.2.0 written to /workspace/builds/worker-72/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-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] 09a16bb613e96eea3701bda5842b0ed9603c83408aee85891ee56ec83e0ea41d
[INFO] running `Command { std: "docker" "start" "-a" "09a16bb613e96eea3701bda5842b0ed9603c83408aee85891ee56ec83e0ea41d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09a16bb613e96eea3701bda5842b0ed9603c83408aee85891ee56ec83e0ea41d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09a16bb613e96eea3701bda5842b0ed9603c83408aee85891ee56ec83e0ea41d", kill_on_drop: false }`
[INFO] [stdout] 09a16bb613e96eea3701bda5842b0ed9603c83408aee85891ee56ec83e0ea41d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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] e7f599b9331a097fd83a8da3e66acde3b69f649813a112d5d985af0931fbbecc
[INFO] running `Command { std: "docker" "start" "-a" "e7f599b9331a097fd83a8da3e66acde3b69f649813a112d5d985af0931fbbecc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]     Checking spin_sleep v1.0.0
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking spinning_top v0.2.4
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking nanorand v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]    Compiling thiserror v1.0.26
[INFO] [stderr]    Compiling proc-macro-crate v1.0.0
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking flume v0.10.8
[INFO] [stderr]    Compiling num_enum_derive v0.5.3
[INFO] [stderr]     Checking num_enum v0.5.3
[INFO] [stderr]  Documenting crsp-base v0.2.0 (/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(variant_count, step_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `crsp-base`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name crsp_base 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 derive_more=/opt/rustwide/target/debug/deps/libderive_more-7f51f1d1f2b1f18a.so --extern flume=/opt/rustwide/target/debug/deps/libflume-5d79aec0d5d2adab.rmeta --extern num_enum=/opt/rustwide/target/debug/deps/libnum_enum-4ae2513de7d2fe51.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-56f1cf68cc488b68.rmeta --extern spin_sleep=/opt/rustwide/target/debug/deps/libspin_sleep-ca8744a04e0c3b8e.rmeta --extern static_assertions=/opt/rustwide/target/debug/deps/libstatic_assertions-140fe15ab40ccc28.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-e6f46b178d972a75.rmeta --extern tracing=/opt/rustwide/target/debug/deps/libtracing-b4f94ba70ba342f9.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e7f599b9331a097fd83a8da3e66acde3b69f649813a112d5d985af0931fbbecc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7f599b9331a097fd83a8da3e66acde3b69f649813a112d5d985af0931fbbecc", kill_on_drop: false }`
[INFO] [stdout] e7f599b9331a097fd83a8da3e66acde3b69f649813a112d5d985af0931fbbecc
