[INFO] fetching crate cpclib-tokens 0.4.4...
[INFO] documenting cpclib-tokens-0.4.4 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate cpclib-tokens 0.4.4 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate cpclib-tokens 0.4.4 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 cpclib-tokens 0.4.4
[INFO] finished tweaking crates.io crate cpclib-tokens 0.4.4
[INFO] tweaked toml for crates.io crate cpclib-tokens 0.4.4 written to /workspace/builds/worker-10/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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] b3c4a6863b44e9188db76c4a97a6f771b35f43e34085a48e8e6ef726b4dc105a
[INFO] running `Command { std: "docker" "start" "-a" "b3c4a6863b44e9188db76c4a97a6f771b35f43e34085a48e8e6ef726b4dc105a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3c4a6863b44e9188db76c4a97a6f771b35f43e34085a48e8e6ef726b4dc105a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3c4a6863b44e9188db76c4a97a6f771b35f43e34085a48e8e6ef726b4dc105a", kill_on_drop: false }`
[INFO] [stdout] b3c4a6863b44e9188db76c4a97a6f771b35f43e34085a48e8e6ef726b4dc105a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] ff932b1ae47ded555942f3d3187cc93be6dec7a60ab97950cfa410428154931f
[INFO] running `Command { std: "docker" "start" "-a" "ff932b1ae47ded555942f3d3187cc93be6dec7a60ab97950cfa410428154931f", kill_on_drop: false }`
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]     Checking bitsets v0.1.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling remain v0.2.2
[INFO] [stderr]    Compiling delegate v0.5.2
[INFO] [stderr]    Compiling thiserror v1.0.26
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.5
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling tinyvec v1.3.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.19
[INFO] [stderr]    Compiling proc-macro-crate v1.0.0
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling num_enum_derive v0.5.3
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling cargo-lock v4.0.1
[INFO] [stderr]     Checking num_enum v0.5.3
[INFO] [stderr]    Compiling built v0.4.4
[INFO] [stderr]    Compiling cpclib-sna v0.4.4
[INFO] [stderr]    Compiling cpclib-tokens v0.4.4 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting cpclib-tokens v0.4.4 (/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(stmt_expr_attributes)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `cpclib-tokens`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name cpclib_tokens 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 bitsets=/opt/rustwide/target/debug/deps/libbitsets-322830b3a40420ff.rmeta --extern cfg_if=/opt/rustwide/target/debug/deps/libcfg_if-810dd9fbe1e28608.rmeta --extern cpclib_sna=/opt/rustwide/target/debug/deps/libcpclib_sna-b8a121bb0066b9f2.rmeta --extern delegate=/opt/rustwide/target/debug/deps/libdelegate-369ccbf032fda6cd.so --extern either=/opt/rustwide/target/debug/deps/libeither-c2989fcf2933251d.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-998e59f7b2e96b83.rmeta --extern matches=/opt/rustwide/target/debug/deps/libmatches-0bdd068591f2f27b.rmeta --extern num_enum=/opt/rustwide/target/debug/deps/libnum_enum-316fd3ebcc707171.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-a0be09445a5b8225.so --extern remain=/opt/rustwide/target/debug/deps/libremain-2ee1ed152daeec70.so --extern serde=/opt/rustwide/target/debug/deps/libserde-df1c680f233dbcab.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-1f20c4f5ff376b51.rmeta --extern strsim=/opt/rustwide/target/debug/deps/libstrsim-8357b30353f1c425.rmeta --cap-lints=warn --crate-version 0.4.4` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "ff932b1ae47ded555942f3d3187cc93be6dec7a60ab97950cfa410428154931f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff932b1ae47ded555942f3d3187cc93be6dec7a60ab97950cfa410428154931f", kill_on_drop: false }`
[INFO] [stdout] ff932b1ae47ded555942f3d3187cc93be6dec7a60ab97950cfa410428154931f
