[INFO] fetching crate zeronet_tracker 0.1.21...
[INFO] documenting zeronet_tracker-0.1.21 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate zeronet_tracker 0.1.21 into /workspace/builds/worker-24/source
[INFO] validating manifest of crates.io crate zeronet_tracker 0.1.21 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 zeronet_tracker 0.1.21
[INFO] finished tweaking crates.io crate zeronet_tracker 0.1.21
[INFO] tweaked toml for crates.io crate zeronet_tracker 0.1.21 written to /workspace/builds/worker-24/source/Cargo.toml
[INFO] crate crates.io crate zeronet_tracker 0.1.21 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]  Downloading crates ...
[INFO] [stderr]   Downloaded rocket_contrib v0.4.10
[INFO] [stderr]   Downloaded rocket_http v0.4.10
[INFO] [stderr]   Downloaded rocket_codegen v0.4.10
[INFO] [stderr]   Downloaded procfs v0.12.0
[INFO] [stderr]   Downloaded rusqlite v0.27.0
[INFO] [stderr]   Downloaded rusqlite_migration v1.0.0
[INFO] [stderr]   Downloaded nom v2.2.1
[INFO] [stderr]   Downloaded prometheus v0.13.1
[INFO] [stderr]   Downloaded maud_macros v0.23.0
[INFO] [stderr]   Downloaded zeronet_protocol v0.1.9
[INFO] [stderr]   Downloaded maud v0.23.0
[INFO] [stderr]   Downloaded rocket v0.4.10
[INFO] [stderr]   Downloaded zeronet_peerdb v0.1.2
[INFO] [stderr]   Downloaded koibumi-base32 v0.0.2
[INFO] [stderr]   Downloaded libsqlite3-sys v0.24.2
[INFO] [stderr]   Downloaded i2p v0.0.1
[INFO] [stderr]   Downloaded tor v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] 7df1496484257cf918a009f54a8581ff4d52b30f8ebb19a1db0b86c4a2cbedaf
[INFO] running `Command { std: "docker" "start" "-a" "7df1496484257cf918a009f54a8581ff4d52b30f8ebb19a1db0b86c4a2cbedaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7df1496484257cf918a009f54a8581ff4d52b30f8ebb19a1db0b86c4a2cbedaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7df1496484257cf918a009f54a8581ff4d52b30f8ebb19a1db0b86c4a2cbedaf", kill_on_drop: false }`
[INFO] [stdout] 7df1496484257cf918a009f54a8581ff4d52b30f8ebb19a1db0b86c4a2cbedaf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-24/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] b71dde0be682cb1a793eb5e834a5865708601d75928afddd7599ede7c2414ad2
[INFO] running `Command { std: "docker" "start" "-a" "b71dde0be682cb1a793eb5e834a5865708601d75928afddd7599ede7c2414ad2", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling semver v1.0.9
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling paste v1.0.7
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking os_str_bytes v6.0.1
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]     Checking koibumi-base32 v0.0.2
[INFO] [stderr]     Checking tokio v1.18.2
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking clap_lex v0.2.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking rmp v0.8.11
[INFO] [stderr]     Checking rustc_version v0.4.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rmpv v1.0.0
[INFO] [stderr]     Checking clap v3.1.18
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]    Compiling zeronet_tracker v0.1.21 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking futures-util v0.3.21
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking futures-executor v0.3.21
[INFO] [stderr]     Checking futures v0.3.21
[INFO] [stderr]     Checking serde_json v1.0.81
[INFO] [stderr]     Checking serde_bytes v0.11.6
[INFO] [stderr]     Checking rmp-serde v0.15.5
[INFO] [stderr]     Checking zeronet_protocol v0.1.9
[INFO] [stderr]     Checking zeronet_peerdb v0.1.2
[INFO] [stderr]  Documenting zeronet_tracker v0.1.21 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.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 `zeronet_tracker`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name zeronet_tracker src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=873c7d007ca1a14d -L dependency=/opt/rustwide/target/debug/deps --extern base64=/opt/rustwide/target/debug/deps/libbase64-8bcb81a96746c276.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-6248d1a210260e82.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-1879e3f77b1a96be.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-4c2b941844e2fcbb.rmeta --extern pretty_env_logger=/opt/rustwide/target/debug/deps/libpretty_env_logger-7d7f3cc6a1ee40c6.rmeta --extern rustc_version=/opt/rustwide/target/debug/deps/librustc_version-586e8f3cf2117e9d.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-d4d6a9fe7dda36ea.rmeta --extern serde_bytes=/opt/rustwide/target/debug/deps/libserde_bytes-2dfbc3f1e5175ddb.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-58508c1119073e30.rmeta --extern zeronet_peerdb=/opt/rustwide/target/debug/deps/libzeronet_peerdb-a4955c80fb604dd8.rmeta --extern zeronet_protocol=/opt/rustwide/target/debug/deps/libzeronet_protocol-e8fa377737fc4597.rmeta --cap-lints=warn --crate-version 0.1.21` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b71dde0be682cb1a793eb5e834a5865708601d75928afddd7599ede7c2414ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b71dde0be682cb1a793eb5e834a5865708601d75928afddd7599ede7c2414ad2", kill_on_drop: false }`
[INFO] [stdout] b71dde0be682cb1a793eb5e834a5865708601d75928afddd7599ede7c2414ad2