[INFO] cloning repository https://github.com/desbma/firstname-chooser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/desbma/firstname-chooser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesbma%2Ffirstname-chooser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdesbma%2Ffirstname-chooser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6244ed9fa884527b08ee56013ae351e22270ffd1
[INFO] documenting desbma/firstname-chooser 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%2Fdesbma%2Ffirstname-chooser" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/desbma/firstname-chooser 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/desbma/firstname-chooser
[INFO] finished tweaking git repo https://github.com/desbma/firstname-chooser
[INFO] tweaked toml for git repo https://github.com/desbma/firstname-chooser written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/desbma/firstname-chooser 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simple_logger v1.12.1
[INFO] [stderr]   Downloaded async-compression v0.3.8
[INFO] [stderr]   Downloaded arg_enum_proc_macro v0.3.1
[INFO] [stderr]   Downloaded dialoguer v0.8.0
[INFO] [stderr]   Downloaded decorum v0.3.1
[INFO] [stderr]   Downloaded zip v0.5.13
[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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87288133b16af63a46d75f0c1472e491e55fd14e0c4a04c5240e0f888ef7f64b
[INFO] running `Command { std: "docker" "start" "-a" "87288133b16af63a46d75f0c1472e491e55fd14e0c4a04c5240e0f888ef7f64b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87288133b16af63a46d75f0c1472e491e55fd14e0c4a04c5240e0f888ef7f64b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87288133b16af63a46d75f0c1472e491e55fd14e0c4a04c5240e0f888ef7f64b", kill_on_drop: false }`
[INFO] [stdout] 87288133b16af63a46d75f0c1472e491e55fd14e0c4a04c5240e0f888ef7f64b
[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: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] cef8b55f435caf9a26d9c83556d2e04a55d75c4f479b8fcbf04bb8ea57236a46
[INFO] running `Command { std: "docker" "start" "-a" "cef8b55f435caf9a26d9c83556d2e04a55d75c4f479b8fcbf04bb8ea57236a46", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling openssl v0.10.35
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling native-tls v0.2.7
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking futures-io v0.3.16
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[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking openssl-probe v0.1.4
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[INFO] [stderr]    Compiling crossbeam-queue v0.3.2
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[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking number_prefix v0.3.0
[INFO] [stderr]     Checking unicode-segmentation v1.8.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking zeroize v1.4.1
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[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking unidecode v0.3.0
[INFO] [stderr]    Compiling tokio v1.9.0
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[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling futures-util v0.3.16
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[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking tracing-core v0.1.18
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[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking foreign-types v0.3.2
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[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]     Checking rand_chacha v0.3.1
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[INFO] [stderr]     Checking dialoguer v0.8.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking bzip2 v0.4.3
[INFO] [stderr]     Checking crossbeam v0.8.1
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking async-compression v0.3.8
[INFO] [stderr]     Checking h2 v0.3.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]    Compiling arg_enum_proc_macro v0.3.1
[INFO] [stderr]     Checking hyper v0.14.11
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking zip v0.5.13
[INFO] [stderr]     Checking structopt v0.3.22
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking decorum v0.3.1
[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]  Documenting firstname-chooser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `firstname-chooser`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name firstname_chooser src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=225b6cb4060166b0 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-d63c37c8cbabae71.rmeta --extern arg_enum_proc_macro=/opt/rustwide/target/debug/deps/libarg_enum_proc_macro-5644837d3f6b47b5.so --extern console=/opt/rustwide/target/debug/deps/libconsole-f91bd811252a45a7.rmeta --extern crossbeam=/opt/rustwide/target/debug/deps/libcrossbeam-80d11c7a4b4493a4.rmeta --extern csv=/opt/rustwide/target/debug/deps/libcsv-7af615c259c61356.rmeta --extern decorum=/opt/rustwide/target/debug/deps/libdecorum-8e2d47eee1057937.rmeta --extern dialoguer=/opt/rustwide/target/debug/deps/libdialoguer-72af8cec7b414ca5.rmeta --extern heck=/opt/rustwide/target/debug/deps/libheck-374d77c3ce24d356.rmeta --extern indicatif=/opt/rustwide/target/debug/deps/libindicatif-74b6cdd1ac49ebad.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-768244cffa2ddad5.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-68d7e05ce8904cdd.rmeta --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-1717e129a25f0cc3.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-d80236683885ced5.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-ea9a54b5fb786416.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a2422c4a4740687b.rmeta --extern simple_logger=/opt/rustwide/target/debug/deps/libsimple_logger-a89a76eaa83172b6.rmeta --extern strsim=/opt/rustwide/target/debug/deps/libstrsim-b9e935b4092685ab.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-f86846a69a60e9db.rmeta --extern unidecode=/opt/rustwide/target/debug/deps/libunidecode-bfdb8be5e2d80033.rmeta --extern xdg=/opt/rustwide/target/debug/deps/libxdg-86784343da83fa59.rmeta --extern zip=/opt/rustwide/target/debug/deps/libzip-0f4768b7f2212198.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[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] running `Command { std: "docker" "inspect" "cef8b55f435caf9a26d9c83556d2e04a55d75c4f479b8fcbf04bb8ea57236a46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cef8b55f435caf9a26d9c83556d2e04a55d75c4f479b8fcbf04bb8ea57236a46", kill_on_drop: false }`
[INFO] [stdout] cef8b55f435caf9a26d9c83556d2e04a55d75c4f479b8fcbf04bb8ea57236a46