[INFO] fetching crate lsm 0.1.0...
[INFO] documenting lsm-0.1.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate lsm 0.1.0 into /workspace/builds/worker-67/source
[INFO] validating manifest of crates.io crate lsm 0.1.0 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 lsm 0.1.0
[INFO] finished tweaking crates.io crate lsm 0.1.0
[INFO] tweaked toml for crates.io crate lsm 0.1.0 written to /workspace/builds/worker-67/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-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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] 0009cbc6d1fb9d88df962e90d93f7813a481c40545ab2ddbf5831fa5788981c2
[INFO] running `Command { std: "docker" "start" "-a" "0009cbc6d1fb9d88df962e90d93f7813a481c40545ab2ddbf5831fa5788981c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0009cbc6d1fb9d88df962e90d93f7813a481c40545ab2ddbf5831fa5788981c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0009cbc6d1fb9d88df962e90d93f7813a481c40545ab2ddbf5831fa5788981c2", kill_on_drop: false }`
[INFO] [stdout] 0009cbc6d1fb9d88df962e90d93f7813a481c40545ab2ddbf5831fa5788981c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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] 5f7c3637174604ce92a0ba7059d73be38541be0cfa8a2ba36c3c8321de0dd7b0
[INFO] running `Command { std: "docker" "start" "-a" "5f7c3637174604ce92a0ba7059d73be38541be0cfa8a2ba36c3c8321de0dd7b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling snap v1.0.5
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking lru v0.6.6
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]     Checking futures-util v0.3.16
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking serde v1.0.127
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]  Documenting lsm v0.1.0 (/opt/rustwide/workdir)
[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(map_first_last) ]
[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:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![ feature(trait_alias) ]
[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:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![ feature(async_stream) ]
[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:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![ feature(write_all_vectored) ]
[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:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![ feature(array_methods) ]
[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:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![ feature(get_mut_unchecked) ]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 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 `lsm`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name lsm src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="snap"' --cfg 'feature="snappy-compression"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bincode=/opt/rustwide/target/debug/deps/libbincode-96c2408f8431531b.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-a7d9618abda1ca5d.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f8abb66ffc16068c.rmeta --extern lru=/opt/rustwide/target/debug/deps/liblru-bd5cbe410037aaa4.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-07537f67e3fa3d99.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-4ab2fd0aefd2fc60.rmeta --extern serde_bytes=/opt/rustwide/target/debug/deps/libserde_bytes-b193d2c721300d6f.rmeta --extern snap=/opt/rustwide/target/debug/deps/libsnap-9c912d248615d752.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-3cd702391f7d30a2.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5f7c3637174604ce92a0ba7059d73be38541be0cfa8a2ba36c3c8321de0dd7b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f7c3637174604ce92a0ba7059d73be38541be0cfa8a2ba36c3c8321de0dd7b0", kill_on_drop: false }`
[INFO] [stdout] 5f7c3637174604ce92a0ba7059d73be38541be0cfa8a2ba36c3c8321de0dd7b0
