[INFO] fetching crate lalrproc 0.0.7...
[INFO] documenting lalrproc-0.0.7 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate lalrproc 0.0.7 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate lalrproc 0.0.7 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 lalrproc 0.0.7
[INFO] finished tweaking crates.io crate lalrproc 0.0.7
[INFO] tweaked toml for crates.io crate lalrproc 0.0.7 written to /workspace/builds/worker-14/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] [stderr]     Blocking waiting for file lock on package cache
[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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] c0aef90dbb98c0e7e675de4d8e6c5b57bec9b85a9ea1c6f55c00accb845cfc3d
[INFO] running `Command { std: "docker" "start" "-a" "c0aef90dbb98c0e7e675de4d8e6c5b57bec9b85a9ea1c6f55c00accb845cfc3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c0aef90dbb98c0e7e675de4d8e6c5b57bec9b85a9ea1c6f55c00accb845cfc3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0aef90dbb98c0e7e675de4d8e6c5b57bec9b85a9ea1c6f55c00accb845cfc3d", kill_on_drop: false }`
[INFO] [stdout] c0aef90dbb98c0e7e675de4d8e6c5b57bec9b85a9ea1c6f55c00accb845cfc3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 581063854e07b0d4d1c1db5ab37ea3570eeed2706bffb76338a93440313aed22
[INFO] running `Command { std: "docker" "start" "-a" "581063854e07b0d4d1c1db5ab37ea3570eeed2706bffb76338a93440313aed22", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling regex-syntax v0.6.26
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling once_cell v1.12.0
[INFO] [stderr]    Compiling fixedbitset v0.4.1
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling pico-args v0.4.2
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling parking_lot v0.12.0
[INFO] [stderr]    Compiling term v0.7.0
[INFO] [stderr]    Compiling petgraph v0.6.2
[INFO] [stderr]    Compiling string_cache v0.8.4
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]    Compiling ascii-canvas v3.0.0
[INFO] [stderr]     Checking lalrpop-util v0.19.8
[INFO] [stderr]    Compiling lalrpop v0.19.8
[INFO] [stderr]    Compiling lalrproc v0.0.7 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting lalrproc v0.0.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(proc_macro_diagnostic)]
[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 `lalrproc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name lalrproc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=174fbd947b9d106f -L dependency=/opt/rustwide/target/debug/deps --extern lalrpop_util=/opt/rustwide/target/debug/deps/liblalrpop_util-8e816f849b46813f.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.0.7` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "581063854e07b0d4d1c1db5ab37ea3570eeed2706bffb76338a93440313aed22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "581063854e07b0d4d1c1db5ab37ea3570eeed2706bffb76338a93440313aed22", kill_on_drop: false }`
[INFO] [stdout] 581063854e07b0d4d1c1db5ab37ea3570eeed2706bffb76338a93440313aed22