[INFO] cloning repository https://github.com/yarrow/slightly-smaller-setop-for-question
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yarrow/slightly-smaller-setop-for-question" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyarrow%2Fslightly-smaller-setop-for-question", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyarrow%2Fslightly-smaller-setop-for-question'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4230686b714bd32da42d35f6af8d140c7ab8bcf
[INFO] documenting yarrow/slightly-smaller-setop-for-question 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%2Fyarrow%2Fslightly-smaller-setop-for-question" "/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/yarrow/slightly-smaller-setop-for-question 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/yarrow/slightly-smaller-setop-for-question
[INFO] finished tweaking git repo https://github.com/yarrow/slightly-smaller-setop-for-question
[INFO] tweaked toml for git repo https://github.com/yarrow/slightly-smaller-setop-for-question written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/yarrow/slightly-smaller-setop-for-question 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 quote v0.6.8
[INFO] [stderr]   Downloaded cfg-if v0.1.5
[INFO] [stderr]   Downloaded proc-macro2 v0.4.20
[INFO] [stderr]   Downloaded indexmap v1.0.1
[INFO] [stderr]   Downloaded syn v0.15.11
[INFO] [stderr]   Downloaded rental v0.5.2
[INFO] [stderr]   Downloaded rental-impl v0.5.2
[INFO] [stderr]   Downloaded memchr v2.1.0
[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] 2a48b14a657e0a4da6764da91083146bd706d7c6f7bdc0e7e5b5da47320390c5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2a48b14a657e0a4da6764da91083146bd706d7c6f7bdc0e7e5b5da47320390c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a48b14a657e0a4da6764da91083146bd706d7c6f7bdc0e7e5b5da47320390c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a48b14a657e0a4da6764da91083146bd706d7c6f7bdc0e7e5b5da47320390c5", kill_on_drop: false }`
[INFO] [stdout] 2a48b14a657e0a4da6764da91083146bd706d7c6f7bdc0e7e5b5da47320390c5
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1be3bb65e36828b429199e7cb5c2933e26cbfca329bf7890aa6fa3240f84dd9f
[INFO] running `Command { std: "docker" "start" "-a" "1be3bb65e36828b429199e7cb5c2933e26cbfca329bf7890aa6fa3240f84dd9f", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking indexmap v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.15.11
[INFO] [stderr]    Compiling rental-impl v0.5.2
[INFO] [stderr]     Checking rental v0.5.2
[INFO] [stderr]  Documenting minimal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.90s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rental v0.5.2
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 6`
[INFO] running `Command { std: "docker" "inspect" "1be3bb65e36828b429199e7cb5c2933e26cbfca329bf7890aa6fa3240f84dd9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1be3bb65e36828b429199e7cb5c2933e26cbfca329bf7890aa6fa3240f84dd9f", kill_on_drop: false }`
[INFO] [stdout] 1be3bb65e36828b429199e7cb5c2933e26cbfca329bf7890aa6fa3240f84dd9f