[INFO] fetching crate lalrpop-lambda 0.6.1...
[INFO] documenting lalrpop-lambda-0.6.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate lalrpop-lambda 0.6.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate lalrpop-lambda 0.6.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lalrpop-lambda 0.6.1
[INFO] finished tweaking crates.io crate lalrpop-lambda 0.6.1
[INFO] tweaked toml for crates.io crate lalrpop-lambda 0.6.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate lalrpop-lambda 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stderr]  Downloading crates ...
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[INFO] [stderr]   Downloaded rayon v1.0.3
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[INFO] [stderr]   Downloaded lalrpop v0.17.0
[INFO] [stderr]   Downloaded rayon-core v1.4.1
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.45
[INFO] [stderr]   Downloaded lalrpop-util v0.17.0
[INFO] [stderr]   Downloaded bumpalo v2.4.3
[INFO] [stderr]   Downloaded ena v0.13.0
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c481c2ba9038ff5977bc312f639920b44817860c79127eff69a3807e93d27ed2
[INFO] running `Command { std: "docker" "start" "-a" "c481c2ba9038ff5977bc312f639920b44817860c79127eff69a3807e93d27ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c481c2ba9038ff5977bc312f639920b44817860c79127eff69a3807e93d27ed2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c481c2ba9038ff5977bc312f639920b44817860c79127eff69a3807e93d27ed2", kill_on_drop: false }`
[INFO] [stdout] c481c2ba9038ff5977bc312f639920b44817860c79127eff69a3807e93d27ed2
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ef9dacb1aafa6aa0ae58b51793f88031aa3fc5f672ab7ef5ccce5857eeedc01
[INFO] running `Command { std: "docker" "start" "-a" "1ef9dacb1aafa6aa0ae58b51793f88031aa3fc5f672ab7ef5ccce5857eeedc01", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling typenum v1.10.0
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[INFO] [stderr]    Compiling serde v1.0.92
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[INFO] [stderr]    Compiling regex v1.1.7
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[INFO] [stderr]    Compiling lalrpop-util v0.17.0
[INFO] [stderr]    Compiling wasm-bindgen v0.2.45
[INFO] [stderr]    Compiling regex v0.2.11
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[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling bit-set v0.5.1
[INFO] [stderr]    Compiling ena v0.13.0
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
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[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.45
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.45
[INFO] [stderr]    Compiling serde_derive v1.0.92
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.45
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.0
[INFO] [stderr]    Compiling lalrpop-lambda v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting lalrpop-lambda v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | / #![feature(non_ascii_idents,
[INFO] [stdout] 43 | |            box_syntax,
[INFO] [stdout] 44 | |            box_patterns,
[INFO] [stdout] 45 | |            fn_traits,
[INFO] [stdout] 46 | |            unboxed_closures)]
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `non_ascii_idents` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [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 `lalrpop-lambda`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type rlib --crate-type cdylib --crate-name lalrpop_lambda src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="wasm"' --cfg 'feature="wasm-bindgen"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern lalrpop_util=/opt/rustwide/target/debug/deps/liblalrpop_util-23c872c35f1d66d8.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-eaf7ba3323c21665.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-41c332e4dea41446.rmeta --cap-lints=warn --crate-version 0.6.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "1ef9dacb1aafa6aa0ae58b51793f88031aa3fc5f672ab7ef5ccce5857eeedc01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ef9dacb1aafa6aa0ae58b51793f88031aa3fc5f672ab7ef5ccce5857eeedc01", kill_on_drop: false }`
[INFO] [stdout] 1ef9dacb1aafa6aa0ae58b51793f88031aa3fc5f672ab7ef5ccce5857eeedc01
