[INFO] cloning repository https://github.com/recursive-bloom/bloom-rpc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/recursive-bloom/bloom-rpc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frecursive-bloom%2Fbloom-rpc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frecursive-bloom%2Fbloom-rpc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc74f83f410a96c806f42bfa5572c7d04f31353c
[INFO] documenting recursive-bloom/bloom-rpc against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frecursive-bloom%2Fbloom-rpc" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/recursive-bloom/bloom-rpc 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 git repo https://github.com/recursive-bloom/bloom-rpc
[INFO] finished tweaking git repo https://github.com/recursive-bloom/bloom-rpc
[INFO] tweaked toml for git repo https://github.com/recursive-bloom/bloom-rpc written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/recursive-bloom/bloom-rpc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/tomusdrw/rust-web3`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded jsonrpc-derive v14.2.1
[INFO] [stderr]   Downloaded jsonrpc-server-utils v14.2.0
[INFO] [stderr]   Downloaded jsonrpc-http-server v14.2.0
[INFO] [stderr]   Downloaded soketto v0.4.1
[INFO] [stderr]   Downloaded parity-scale-codec v1.3.4
[INFO] [stderr]   Downloaded tracing-core v0.1.13
[INFO] [stderr]   Downloaded uint v0.8.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] cb3dd2fd6055a37c3fa2e5a2c119a109901457286230130c7357b021fad0a44b
[INFO] running `Command { std: "docker" "start" "-a" "cb3dd2fd6055a37c3fa2e5a2c119a109901457286230130c7357b021fad0a44b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb3dd2fd6055a37c3fa2e5a2c119a109901457286230130c7357b021fad0a44b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb3dd2fd6055a37c3fa2e5a2c119a109901457286230130c7357b021fad0a44b", kill_on_drop: false }`
[INFO] [stdout] cb3dd2fd6055a37c3fa2e5a2c119a109901457286230130c7357b021fad0a44b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] bdbf4e0371aa187d477ac3737547ec4beb4b4d5c31d267dde16590b5ea585628
[INFO] running `Command { std: "docker" "start" "-a" "bdbf4e0371aa187d477ac3737547ec4beb4b4d5c31d267dde16590b5ea585628", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling log v0.4.11
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[INFO] [stderr]    Compiling cc v1.0.41
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[INFO] [stderr]     Checking byte-slice-cast v0.3.5
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[INFO] [stderr]     Checking tracing-core v0.1.13
[INFO] [stderr]     Checking getrandom v0.1.14
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[INFO] [stderr]     Checking parking_lot_core v0.7.2
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[INFO] [stderr]    Compiling openssl-sys v0.9.58
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[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling derive_more v0.99.9
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[INFO] [stderr]     Checking parity-scale-codec v1.3.4
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking impl-serde v0.3.1
[INFO] [stderr]     Checking ethbloom v0.9.2
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]     Checking jsonrpc-core v14.2.0
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stderr]     Checking jsonrpc-server-utils v14.2.0
[INFO] [stderr]    Compiling proc-macro-crate v0.1.5
[INFO] [stderr]     Checking jsonrpc-http-server v14.2.0
[INFO] [stderr]    Compiling jsonrpc-derive v14.2.1
[INFO] [stderr]     Checking impl-codec v0.4.2
[INFO] [stderr]     Checking primitive-types v0.7.2
[INFO] [stderr]     Checking ethereum-types v0.9.2
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking ethabi v12.0.0
[INFO] [stderr]     Checking web3 v0.13.0 (https://github.com/tomusdrw/rust-web3#513fce3e)
[INFO] [stderr]  Documenting eth-rpc v0.1.0 (/opt/rustwide/workdir/eth-rpc)
[INFO] [stderr]  Documenting bloom-rpc v0.1.0 (/opt/rustwide/workdir/rpc-server)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> rpc-server/src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(str_strip)]
[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 `bloom-rpc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name bloom_rpc rpc-server/src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=0c79848cf06a3e4e -L dependency=/opt/rustwide/target/debug/deps --extern ansi_term=/opt/rustwide/target/debug/deps/libansi_term-667029c6de371069.rmeta --extern ethereum_types=/opt/rustwide/target/debug/deps/libethereum_types-f54dd7dfd788904f.rmeta --extern jsonrpc_core=/opt/rustwide/target/debug/deps/libjsonrpc_core-4dedd258bdcfa79e.rmeta --extern jsonrpc_derive=/opt/rustwide/target/debug/deps/libjsonrpc_derive-05e69561a753376a.so --extern jsonrpc_http_server=/opt/rustwide/target/debug/deps/libjsonrpc_http_server-49f562851890a730.rmeta --extern rustc_hex=/opt/rustwide/target/debug/deps/librustc_hex-f1522e6acbb3d4d2.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-592a50c4f486585b.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-f481cbf91e6bdcd6.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-e6802c2ceb3ceb0c.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "bdbf4e0371aa187d477ac3737547ec4beb4b4d5c31d267dde16590b5ea585628", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdbf4e0371aa187d477ac3737547ec4beb4b4d5c31d267dde16590b5ea585628", kill_on_drop: false }`
[INFO] [stdout] bdbf4e0371aa187d477ac3737547ec4beb4b4d5c31d267dde16590b5ea585628