[INFO] cloning repository https://github.com/Spanfile/The-Caretaker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Spanfile/The-Caretaker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpanfile%2FThe-Caretaker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSpanfile%2FThe-Caretaker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 80a2d986703bd436b45bc59a6658d8394d873b94
[INFO] documenting Spanfile/The-Caretaker 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%2FSpanfile%2FThe-Caretaker" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Spanfile/The-Caretaker 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/Spanfile/The-Caretaker
[INFO] finished tweaking git repo https://github.com/Spanfile/The-Caretaker
[INFO] tweaked toml for git repo https://github.com/Spanfile/The-Caretaker written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/Spanfile/The-Caretaker 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]  Downloading crates ...
[INFO] [stderr]   Downloaded envy v0.4.2
[INFO] [stderr]   Downloaded enum_dispatch v0.3.7
[INFO] [stderr]   Downloaded diesel-derive-enum v1.1.1
[INFO] [stderr]   Downloaded dynfmt v0.1.5
[INFO] [stderr]   Downloaded nilsimsa v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] f25c164ed54468e4655670cd51c4e0cc8addf5985def6ccada1d8546b735955e
[INFO] running `Command { std: "docker" "start" "-a" "f25c164ed54468e4655670cd51c4e0cc8addf5985def6ccada1d8546b735955e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f25c164ed54468e4655670cd51c4e0cc8addf5985def6ccada1d8546b735955e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f25c164ed54468e4655670cd51c4e0cc8addf5985def6ccada1d8546b735955e", kill_on_drop: false }`
[INFO] [stdout] f25c164ed54468e4655670cd51c4e0cc8addf5985def6ccada1d8546b735955e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] e0e20259c683fcd3584f13dbee6761c45c21d8f5756202611ca5f6e1b8fe4f7e
[INFO] running `Command { std: "docker" "start" "-a" "e0e20259c683fcd3584f13dbee6761c45c21d8f5756202611ca5f6e1b8fe4f7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]    Compiling futures-core v0.3.16
[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-channel v0.3.16
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]     Checking unicode-bidi v0.3.6
[INFO] [stderr]     Checking cpufeatures v0.1.5
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling erased-serde v0.3.16
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking ipnet v2.3.1
[INFO] [stderr]    Compiling serenity v0.10.9
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]     Checking typemap_rev v0.1.5
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking dotenv v0.15.0
[INFO] [stderr]    Compiling tokio v1.10.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking nilsimsa v0.2.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/nilsimsa-0.2.0/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![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 compile `nilsimsa` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e0e20259c683fcd3584f13dbee6761c45c21d8f5756202611ca5f6e1b8fe4f7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0e20259c683fcd3584f13dbee6761c45c21d8f5756202611ca5f6e1b8fe4f7e", kill_on_drop: false }`
[INFO] [stdout] e0e20259c683fcd3584f13dbee6761c45c21d8f5756202611ca5f6e1b8fe4f7e