[INFO] fetching crate muta-protocol 0.1.0-alpha.1...
[INFO] documenting muta-protocol-0.1.0-alpha.1 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate muta-protocol 0.1.0-alpha.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate muta-protocol 0.1.0-alpha.1 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate muta-protocol 0.1.0-alpha.1
[INFO] finished tweaking crates.io crate muta-protocol 0.1.0-alpha.1
[INFO] tweaked toml for crates.io crate muta-protocol 0.1.0-alpha.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crunchy v0.1.6
[INFO] [stderr]   Downloaded creep v0.1.1
[INFO] [stderr]   Downloaded ethereum-types v0.4.2
[INFO] [stderr]   Downloaded fixed-hash v0.5.2
[INFO] [stderr]   Downloaded uint v0.4.1
[INFO] [stderr]   Downloaded fixed-hash v0.2.5
[INFO] [stderr]   Downloaded hashbrown v0.3.1
[INFO] [stderr]   Downloaded ethbloom v0.5.3
[INFO] [stderr]   Downloaded ethereum-types-serialize v0.2.2
[INFO] [stderr]   Downloaded rlp v0.3.0
[INFO] [stderr]   Downloaded cita_trie v2.0.0
[INFO] [stderr]   Downloaded hasher v0.1.4
[INFO] [stderr]   Downloaded tiny-keccak v1.5.0
[INFO] [stderr]   Downloaded impl-serde v0.2.3
[INFO] [stderr]   Downloaded ethbloom v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e81b17faade181ace82ae00e01b818ff95d406038646d9f9ea43af639ed34b5
[INFO] running `Command { std: "docker" "start" "-a" "7e81b17faade181ace82ae00e01b818ff95d406038646d9f9ea43af639ed34b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e81b17faade181ace82ae00e01b818ff95d406038646d9f9ea43af639ed34b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e81b17faade181ace82ae00e01b818ff95d406038646d9f9ea43af639ed34b5", kill_on_drop: false }`
[INFO] [stdout] 7e81b17faade181ace82ae00e01b818ff95d406038646d9f9ea43af639ed34b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 521b8c293d3516d5ca24e2eb66fe354fa49da14c5aafccf196ff182fdae7ac20
[INFO] running `Command { std: "docker" "start" "-a" "521b8c293d3516d5ca24e2eb66fe354fa49da14c5aafccf196ff182fdae7ac20", kill_on_drop: false }`
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]    Compiling heapsize v0.4.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]     Checking lock_api v0.2.0
[INFO] [stderr]     Checking rlp v0.4.6
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking tiny-keccak v1.5.0
[INFO] [stderr]     Checking hashbrown v0.3.1
[INFO] [stderr]     Checking impl-rlp v0.2.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking fixed-hash v0.2.5
[INFO] [stderr]     Checking uint v0.4.1
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]    Compiling aho-corasick v1.0.1
[INFO] [stderr]     Checking hasher v0.1.4
[INFO] [stderr]     Checking creep v0.1.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking fixed-hash v0.5.2
[INFO] [stderr]    Compiling regex v1.8.1
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling derive_more v0.15.0
[INFO] [stderr]     Checking prost v0.6.1
[INFO] [stderr]     Checking serde v1.0.160
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking ethereum-types-serialize v0.2.2
[INFO] [stderr]     Checking impl-serde v0.2.3
[INFO] [stderr]     Checking serde_json v1.0.96
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking ethbloom v0.5.3
[INFO] [stderr]     Checking ethbloom v0.8.1
[INFO] [stderr]     Checking ethereum-types v0.4.2
[INFO] [stderr]     Checking rlp v0.3.0
[INFO] [stderr]     Checking cita_trie v2.0.0
[INFO] [stderr]  Documenting muta-protocol v0.1.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `muta-protocol`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name muta_protocol src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=be53da009b332e77 -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-aa6eea4426c29787.so --extern bincode=/opt/rustwide/target/debug/deps/libbincode-0226c0d4afd4d238.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-f66b59f6631a5df0.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-cce82a27a80d4f9f.rmeta --extern cita_trie=/opt/rustwide/target/debug/deps/libcita_trie-7dacf8a6abf8a305.rmeta --extern creep=/opt/rustwide/target/debug/deps/libcreep-c98c0b8972cbb6c7.rmeta --extern derive_more=/opt/rustwide/target/debug/deps/libderive_more-ab253e8d98cf8db2.so --extern ethbloom=/opt/rustwide/target/debug/deps/libethbloom-8c20dd90dc04f643.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-9ebd8262a1c6f52f.rmeta --extern hasher=/opt/rustwide/target/debug/deps/libhasher-c1eb0f9d92909d19.rmeta --extern hex=/opt/rustwide/target/debug/deps/libhex-1d0606a3fec394a0.rmeta --extern json=/opt/rustwide/target/debug/deps/libjson-807651f2eca983d2.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-9c7d51f549cf58b7.rmeta --extern num_bigint=/opt/rustwide/target/debug/deps/libnum_bigint-5f1b782b1e242340.rmeta --extern prost=/opt/rustwide/target/debug/deps/libprost-991977928799609d.rmeta --extern rlp=/opt/rustwide/target/debug/deps/librlp-64cf0c7bad91341e.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-0bc9d1a5d13f66c2.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-a9d17892bdab6ec5.rmeta --cap-lints=warn --crate-version 0.1.0-alpha.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "521b8c293d3516d5ca24e2eb66fe354fa49da14c5aafccf196ff182fdae7ac20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "521b8c293d3516d5ca24e2eb66fe354fa49da14c5aafccf196ff182fdae7ac20", kill_on_drop: false }`
[INFO] [stdout] 521b8c293d3516d5ca24e2eb66fe354fa49da14c5aafccf196ff182fdae7ac20
